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The Audi S4 name was originally used for the high performance sport version of the Audi 100
Audi 100

The Audi 100 and Audi 200 are mid-sized automobiles from Audi , made between 1968 and 1994. The C3 model of the Audi 100 was sold in the United States as the Audi 5000 until 1988....
 car
Automobile

An automobile or motor car is a wheeled motor vehicle for transportation passengers, which also carries its own car engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally f...
 and has subsequently been used for similar versions of the Audi A4
Audi A4

The Audi A4 is a compact executive car produced by the Germany automaker Audi since 1994. The first generation A4 succeeded the Audi 80.It is available as a sedan or a station wagon ....
 series.

They are, or have been available as an Avant, Audi's name for an estate car
Station wagon

A station wagon in American English, Australian English, Canadian English and New Zealand English usage and an estate car in British English usage, is a passenger automobile with a car body style similar to a sedan but with the roofline following the full, sometimes extended rear cargo area, i.e. ending with a more vertical door...
, a saloon, and a Cabriolet (convertible
Convertible

A convertible is a type of automobile in which the roof can retract and fold away, converting it from an enclosed to an open-air vehicle. Many different car body styles are manufactured and marketed in convertible form....
) version.

Like most Audi S cars
Audi S and RS models

Audi S and RS models are a range of high performance orientated automobile, of certain Audi model ranges, from the Germany automotive industry company, Audi AG....
, the S4 is only available with Audi's quattro four-wheel drive
Four-wheel drive

Four-wheel drive, 4WD, 4x4 , or AWD is a four-wheeled vehicle with a Powertrain that allows all four wheels to receive torque from the engine simultaneously....
 (4WD) system, with the S4 utilising the Torsen
Torsen

Torsen is a type of limited slip differential used in automobiles. It was invented by United States of America Vernon Gleasman and manufactured by the Gleason Corporation....
-based permanent full-time 4WD.






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Encyclopedia


The Audi S4 name was originally used for the high performance sport version of the Audi 100
Audi 100

The Audi 100 and Audi 200 are mid-sized automobiles from Audi , made between 1968 and 1994. The C3 model of the Audi 100 was sold in the United States as the Audi 5000 until 1988....
 car
Automobile

An automobile or motor car is a wheeled motor vehicle for transportation passengers, which also carries its own car engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally f...
 and has subsequently been used for similar versions of the Audi A4
Audi A4

The Audi A4 is a compact executive car produced by the Germany automaker Audi since 1994. The first generation A4 succeeded the Audi 80.It is available as a sedan or a station wagon ....
 series.

They are, or have been available as an Avant, Audi's name for an estate car
Station wagon

A station wagon in American English, Australian English, Canadian English and New Zealand English usage and an estate car in British English usage, is a passenger automobile with a car body style similar to a sedan but with the roofline following the full, sometimes extended rear cargo area, i.e. ending with a more vertical door...
, a saloon, and a Cabriolet (convertible
Convertible

A convertible is a type of automobile in which the roof can retract and fold away, converting it from an enclosed to an open-air vehicle. Many different car body styles are manufactured and marketed in convertible form....
) version.

Like most Audi S cars
Audi S and RS models

Audi S and RS models are a range of high performance orientated automobile, of certain Audi model ranges, from the Germany automotive industry company, Audi AG....
, the S4 is only available with Audi's quattro four-wheel drive
Four-wheel drive

Four-wheel drive, 4WD, 4x4 , or AWD is a four-wheeled vehicle with a Powertrain that allows all four wheels to receive torque from the engine simultaneously....
 (4WD) system, with the S4 utilising the Torsen
Torsen

Torsen is a type of limited slip differential used in automobiles. It was invented by United States of America Vernon Gleasman and manufactured by the Gleason Corporation....
-based permanent full-time 4WD. The S4 has a larger more powerful engine
Internal combustion engine

The internal combustion engine is an engine in which the combustion of a fuel occurs in a combustion chamber inside and integral to the engine. In an internal combustion engine it is always the expansion of the high temperature and pressure gases that are produced by the combustion which apply force to the movable component of the engine, such as...
, larger uprated brakes, and high-performance suspension systems which are not shared with the remainder of the A4 range.

C4 (Typ 4A, 1992-1994)


Audi was reconfiguring its model range during the early 1990s, and introduced the original S4 (Typ 4A) in 1992, as the performance version of the restyled Audi 100 (C4)
Audi 100

The Audi 100 and Audi 200 are mid-sized automobiles from Audi , made between 1968 and 1994. The C3 model of the Audi 100 was sold in the United States as the Audi 5000 until 1988....
 saloon. Despite being based on the Volkswagen Group C4 platform, and sharing its basic structure with the 100, the S4 effectively took the place of the Audi 200 quattro turbo, which had been discontinued the year before. Being the first S4 model from Audi, it is commonly referred to as the Ur-S4, derrived from the German augmentive word - Ursprünglich (meaning: original).

Following Audi's decision in discontinuing the 100 nameplate, it re-badged the car as the Audi A6
Audi A6

The Audi A6 is an executive car car produced by the Germany automaker Audi. It is available in sedan and station wagon body styles. The second and third generation A6 were also used as the basis for the Audi allroad quattro and A6 allroad quattro models respectively....
 in 1994, and the S4 became the S6, although the only real changes to the model were minor cosmetic updates, and the addition of a more powerful limited edition S6 Plus model using the V8 engine
V8 engine

A V8 engine is a V engine with eight cylinder s mounted on the crankcase in two banks of four cylinders, in most cases set at a right angle to each other but sometimes at a narrower angle, with all eight pistons driving a common crankshaft....
. After the first generation A6 was replaced in 1997 by an updated version based on C5 chassis, the S4 and S6 became distinctly separate from one another.

C4 powertrain

The S4 was sold worldwide with a turbocharged
Turbocharger

A turbocharger, or turbo, is a gas compressor used for forced induction of an internal combustion engine. Like a supercharger, the purpose of a turbocharger is to increase the mass of air entering the engine to create more power....
 version of Audi's 2.2 litre (2226 cc), 20-valve inline-5
Straight-5

The straight-5 or inline-5 is an internal combustion engine with five Cylinder aligned in one row, sharing a single engine block and crankcase....
 engine developing and of torque. Bosch
Robert Bosch GmbH

Robert Bosch Gesellschaft mit beschr?nkter Haftung is a German diversified technology-based corporation which was started in 1886 by Robert Bosch in Stuttgart, Germany....
 Motronic
Motronic

Motronic is the trade name given to a range of digital engine-management systems developed by Robert Bosch GmbH....
 engine control unit
Engine Control Unit

An engine control unit is an electronic control unit which controls various aspects of an internal combustion engine's operation. The simplest ECUs control only the quantity of fuel injected into each cylinder each engine cycle....
 took care of all functions of the engine management.

A 4.2 litre V8 engine
V8 engine

A V8 engine is a V engine with eight cylinder s mounted on the crankcase in two banks of four cylinders, in most cases set at a right angle to each other but sometimes at a narrower angle, with all eight pistons driving a common crankshaft....
 became available to Europe
Europe

Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
an customers as an option.

Standard gearbox was a manual transmission
Manual transmission

A manual transmission is a type of Transmission used in automotive applications. It generally utilizes a driver-operated clutch operated by a pedal or lever, for regulating torque transfer from the engine to the transmission, and a gear-shift either operated by hand or by foot ....
 (five and six-speed in Europe, five-speed only in North America
North America

North America is the northern continent of the Americas, situated in the Earth's northern hemisphere and almost totally in the western hemisphere....
), although a 4-speed automatic transmission
Automatic transmission

An automatic transmission is an automobile gearbox that can change gear ratios automatically as the vehicle moves, freeing the driver from having to shift gears manual transmission....
 was available as an option. Torsen
Torsen

Torsen is a type of limited slip differential used in automobiles. It was invented by United States of America Vernon Gleasman and manufactured by the Gleason Corporation....
-based (T-1) quattro permanent four-wheel drive was also standard.

The most common configuration 2.2 L 5-speed offered good acceleration for its day, achieving 100 km/h (62 mph) in just 6.2 seconds.

C4 brakes, wheels and tyres

Ventilated disc brake
Disc brake

The disc brake or disk brake is a device for slowing or stopping the rotation of a wheel. A brake disc , usually made of cast iron or ceramic composites , is connected to the wheel and/or the axle....
s were standard front and rear, with diameter discs up front, and diameter discs at the rear. Anti-lock braking system
Anti-lock braking system

An anti-lock braking system, or ABS is a safety system which prevents the wheels on a motor vehicle from locking while brake.A rotating road wheel allows the driver to maintain steering control under heavy braking by preventing a skid and allowing the wheel to continue interacting Traction with the road surface as directed by driver...
 (ABS) was also standard.

Standard wheel
Wheel

A wheel is a circular device that is capable of rotating on its axis, facilitating movement or transportation whilst supporting a load , or performing labour in machines....
s were 8Jx16 forged alloy wheel
Alloy wheel

Alloy wheels are automobile wheels which are made from an alloy of aluminium or magnesium metals ....
s with 225/50R16 tyre
Tire

Tires, or tyres , are ring-shaped parts, either pneumatic or solid , that fit around wheels to protect them and enhance their function....
s. An optional 7˝Jx15 alloy wheel, with 215/60R15 tyres was also available.

B5 (Typ 8D, 1997-2002)


The second generation S4 (Typ 8D), now correctly titled Audi S4 quattro debuted in 1997, as part of the facelifted B5 platform
Volkswagen B platform

The Volkswagen Group B platform is a mid-size car automobile platform from the Volkswagen Group. It has been used for coup?s, sedan , and station wagon, under the Volkswagen, Audi and ?koda Auto marques over the years....
 Audi A4
Audi A4

The Audi A4 is a compact executive car produced by the Germany automaker Audi since 1994. The first generation A4 succeeded the Audi 80.It is available as a sedan or a station wagon ....
 line-up, although it wasn't available in North America
North America

North America is the northern continent of the Americas, situated in the Earth's northern hemisphere and almost totally in the western hemisphere....
 until year 2000.

In addition to the saloon, an estate version, the Audi S4 Avant, was introduced into the lineup from 1998. Production of the B5 S4 ceased in 2001 although it was still sold together with the next B6 platform generation through 2002 in North America.

Several years after it was sold new, the B5 S4 remains a potent enthusiast car, and as featured in the December 2007 issue of Sport Compact Car magazine, a Torque Factory tuned S4 won a comparison test against several other extreme performance cars.

B5 Powertrain

The B5 S4 had a 2.7 litre (2671 cc) twin-turbo
Twin-turbo

Twin-turbo refers to a turbocharger internal combustion engine on which two turbochargers compress the intake charge. There are two commonly used twin turbo configurations; parallel twin-turbo, and sequential twin-turbo....
-charged 90° third-generation cast iron
Cast iron

Cast iron usually refers to Gray iron, but also identifies a large group of ferrous alloys, which solidify with a eutectic. The color of a fractured surface can be used to identify an alloy....
 V6 engine
V6 engine

A V6 engine is a V engine with six cylinder s mounted on the crankcase in two banks of three cylinders, usually set at either a right angle or an acute angle to each other, with all six pistons driving a common crankshaft....
 with two light-alloy cylinder head
Cylinder head

In an internal combustion engine, the cylinder head sits above the Cylinder and consists of a platform containing part of the combustion chamber and the location of the poppet valves and spark plugs....
s, 5 valves per cylinder
Multi-valve

In automotive engineering, an engine is referred to as multi-valve when each cylinder has more than two poppet valve. Such designs have been around since at least 1912 and perhaps earlier....
, twin double overhead camshafts
Overhead camshaft

Overhead camshaft, commonly abbreviated to OHC, valvetrain configurations place the engine camshaft within the cylinder heads, above the combustion chambers, and drive the poppet valve or tappets in a more direct manner compared to overhead valves and pushrods....
 and variable valve timing
Variable valve timing

Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift, duration or timing of the intake or exhaust Poppet valve to be changed while the engine is in operation....
 (code AGB), with two side-mounted intercooler
Intercooler

An intercooler, or charge air cooler, is an air-to-air or air-to-liquid heat exchanger used on Turbocharger and Supercharger internal combustion engines to improve their volumetric efficiency by increasing intake air charge density through Isochoric process cooling....
s, producing and . Engine management was by way of a Bosch Motronic ME 7.1 (7.0 in North America) engine control unit, and helped it meet the EU3-D emissions standard. For the North American market, the engine was slightly detuned to meet US emissions regulations, output was reduced to and .

As in the previous S4, a six-speed manual transmission (01E C90, gear ratio
Gear ratio

The gear ratio is the relationship between the number of teeth on two gears that are meshed or two sprockets connected with a common roller chain, or the circumferences of two pulleys connected with a drive belt ....
s- 1st: 3.500, 2nd: 1.889, 3rd: 1.231, 4th: 0.967, 5th: 0.806, 6th: 0.684) was standard equipment, as was the Torsen T-1 quattro permanent four-wheel drive system. Final drive ratio for the manual gearbox is 4.111. A five-speed tiptronic
Tiptronic

Tiptronic, is a type of discrete automatic transmission developed by Porsche, and used in its vehicles, and those of its licensees....
 automatic transmission became available for the first time as an option.

The S4 claims acceleration from 0 to in 5.6 seconds, and had an electronically-limited top speed of , making it both the quickest saloon/sedan in the Audi model line, and among the quickest saloon/sedans in the world at that time.

B5 brakes, wheels and tyres

The B5 S4 brake
Brake

A brake is a device for applying a force against the friction of the road, slowing or stopping the motion of a machine or vehicle, or alternatively a device to restrain it from starting to move again....
 system consisted of radially ventilated discs, in diameter by thick up front, and x at the rear. Two-piston HP2 brake calipers at the front (with four pads per caliper), with single-piston sliding brake calipers at the rear. Bosch ABS 5.3 anti-lock braking system (with electronic brakeforce distribution
Electronic brakeforce distribution

Electronic brakeforce distribution or EBD or EBFD is an automobile brake technology that automatically varies the amount of force applied to each of a vehicle's brakes, based on road conditions, speed, loading, etc....
 (EBD) and Electronic Differential Lock (EDL), and later with ESP or Electronic Stability Programme
Electronic Stability Control

Electronic stability control is a computerized technology that improves the safety of a car handling by detecting and preventing skids. When ESC detects loss of steering control, ESC automatically applies individual brakes to help "steer" the vehicle where the driver wants to go....
), coupled with a vacuum servo
Vacuum servo

A vacuum servo is a component used on motor vehicles in their brake system, to provide assistance to the driver by increasing the braking effort....
 completed the system.

Standard fitment alloy wheels were Avus die-cast
Die casting

Die casting is the process of forcing molten metal under high pressure into mold cavities . Most die castings are made from non-ferrous metals, specifically zinc, copper, aluminium, magnesium, lead, and tin based alloys, although ferrous metal die castings are possible....
 aluminium alloy
Aluminium alloy

Aluminium alloys are alloys of aluminium, often with copper, zinc, manganese, silicon, or magnesum. They are much lighter and more corrosion resistant than plain carbon steel, but not as corrosion resistant as pure aluminium....
, 7˝Jx17" in size, shod with 225/45ZR17 performance tyres.

Motorsport

A racing version of the car achieved great success in the SpeedVision World Challenge
SPEED World Challenge

The Speed World Challenge is an United States auto racing series that is sanctioned by the Sports Car Club of America. It consists of two classes: touring car racing and grand tourer....
 with Michael Galati taking the 2001 SpeedVision GT title in a Champion Racing
Champion Racing

Champion Racing is a sports car racing team based in Pompano Beach, Florida, United States. Founded in 1994 by Dave Maraj as the motorsport wing of the Champion Motors car dealership, the team has campaigned various Porsches and Audis in North American road racing series....
 S4, winning four races, and helping Audi to its first Manufacturers' Championship.

The Audi Sport
Audi

AUDI AG, is a Germany car manufacturer which produces cars under the Audi brand, . The name Audi is based on a latin translation of the last name of the founder August "Horch", itself the German word for ?hear." Another explanation for the origin of the name is as an acronym for ?Auto Union Deutschland Ingolstadt."...
 specification Champion A4 chassis included a B5 RS4
Audi RS4

The Audi RS4 quattro is the top tier and highest performing version of the Audi A4 range of automobile. It is a sports car compact executive car produced by quattro GmbH, in limited numbers, for Germany automotive industry - Audi, part of the larger Volkswagen Group....
 engine, and Alcon racing brake calipers - 4-pot fronts and 2-pot rears.

Production Years/Numbers

  • 2000: 5672
  • 2001: 5998
  • 2002: 840


B6 (Typ 8E/8H, 2002-2005)


2004 Audi S4
The third generation S4 quattro (Typ 8E - saloon: 8E2, Avant: 8E5, and Cabriolet: 8H7) debuted in mid-2003. This was based on the latest Volkswagen Group B6 platform
Volkswagen B platform

The Volkswagen Group B platform is a mid-size car automobile platform from the Volkswagen Group. It has been used for coup?s, sedan , and station wagon, under the Volkswagen, Audi and ?koda Auto marques over the years....
 used by the Audi A4
Audi A4

The Audi A4 is a compact executive car produced by the Germany automaker Audi since 1994. The first generation A4 succeeded the Audi 80.It is available as a sedan or a station wagon ....
. Despite having moved to an entirely new platform, the S4's most publicised new feature was its 4.2 L V8 engine
V8 engine

A V8 engine is a V engine with eight cylinder s mounted on the crankcase in two banks of four cylinders, in most cases set at a right angle to each other but sometimes at a narrower angle, with all eight pistons driving a common crankshaft....
. It became available in three bodystyles: 4-door saloon, 5-door Avant (estate), and 2-door Cabriolet (convertible).

Top speed is electronically governed to . Official figures for the 0- sprint in the saloon with manual transmission are 5.6 seconds (Avant 5.8s, Cabriolet 5.9s), however, road tests conducted by American automotive magazines indicated that it could go from a standstill to in 5.1 seconds, and make it to (124 mph) in slightly over 20 seconds, although doing this led to fuel consumption dipping into single digits, considerably lower than the earlier models, leading to the addition of a $1,700 gas guzzler tax (combined 20.2 mpg) for the 6-speed manual sedan in the United States.

The B6 platform S4 was replaced by the B7 platform S4 in late-2005.

B6 Powertrain

Replacing the 2.7 litre biturbo V6 engine
V6 engine

A V6 engine is a V engine with six cylinder s mounted on the crankcase in two banks of three cylinders, usually set at either a right angle or an acute angle to each other, with all six pistons driving a common crankshaft....
 of the previous generation B5 S4, the B6 S4 gained an all aluminium alloy
Aluminium alloy

Aluminium alloys are alloys of aluminium, often with copper, zinc, manganese, silicon, or magnesum. They are much lighter and more corrosion resistant than plain carbon steel, but not as corrosion resistant as pure aluminium....
 4.2 litre (4163 cc), 40-valve V8 engine
V8 engine

A V8 engine is a V engine with eight cylinder s mounted on the crankcase in two banks of four cylinders, in most cases set at a right angle to each other but sometimes at a narrower angle, with all eight pistons driving a common crankshaft....
 with 2xdouble overhead camshaft (DOHC}
Overhead camshaft

Overhead camshaft, commonly abbreviated to OHC, valvetrain configurations place the engine camshaft within the cylinder heads, above the combustion chambers, and drive the poppet valve or tappets in a more direct manner compared to overhead valves and pushrods....
 (chain-driven, with variable inlet camshaft timing) (code BBK), based on the unit from the Audi A8
Audi A8

The Audi A8 is a full-size luxury vehicle built by the Germany automotive industry Audi, to replace the Audi V8 as its Flagship#Automotive. First brought to the market in 1994, most versions of the A8 have featured quattro permanent four-wheel drive as standard, as well as a multitronic or Tiptronic automatic transmission....
. It produced at 7000 rpm, and at 3500 rpm, making it more potent than the RS2 Avant
Audi RS2 Avant

The Audi RS2 Avant was a limited edition, high performance Audi station wagon, sold from 1994 to 1996. Collaboratively designed by Audi and Porsche, and built on Audi's Audi 80, it was the company's first "Audi S and RS models" vehicle, and the first of their high performance Avants; it used the most powerful and most thoroughly develo...
, and nearly as powerful as the B5 RS4
Audi RS4

The Audi RS4 quattro is the top tier and highest performing version of the Audi A4 range of automobile. It is a sports car compact executive car produced by quattro GmbH, in limited numbers, for Germany automotive industry - Audi, part of the larger Volkswagen Group....
. Engine management was by way of a Bosch Motronic ME 7.1.1 engine control unit, powering eight individual spark coils and quad-electrode spark plug
Spark plug

A spark plug is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed Particulate gasoline by means of an electric spark....
s. Ignition timing
Ignition timing

Ignition timing, in a spark ignition internal combustion engine, is the process of setting the time that a spark will occur in the combustion chamber relative to piston position and crankshaft angular velocity....
 is a mapped direct ignition, with cylinder-selective knock control with the aid of four knock sensors.

Like its predecessors, the model was standard with a Getrag
Getrag

Getrag is a leading manufacturer of automobile manual transmissions. The company was founded on 1 May, 1935 in Ludwigsburg, Germany by Hermann Hagenmeyer as the Getriebe- und Zahnradfabrik Hermann Hagenmeyer AG ....
 six-speed (M6S) manual transmission (code FVD) (gear ratio
Gear ratio

The gear ratio is the relationship between the number of teeth on two gears that are meshed or two sprockets connected with a common roller chain, or the circumferences of two pulleys connected with a drive belt ....
s - 1st: 3.667, 2nd: 2.050, 3rd: 1.462, 4th: 1.133, 5th: 0.919, 6th: 0.778), and Torsen
Torsen

Torsen is a type of limited slip differential used in automobiles. It was invented by United States of America Vernon Gleasman and manufactured by the Gleason Corporation....
 T-1 quattro permanent four wheel drive system. Final drive (code EXZ) ratios are 3.889, giving a top gear road speed to engine revs ratio of 24.4 mph to 1000 rpm. The tiptronic
Tiptronic

Tiptronic, is a type of discrete automatic transmission developed by Porsche, and used in its vehicles, and those of its licensees....
 automatic transmission
Automatic transmission

An automatic transmission is an automobile gearbox that can change gear ratios automatically as the vehicle moves, freeing the driver from having to shift gears manual transmission....
 (ratios - 1st: 4.171, 2nd: 2.340, 3rd: 1.521, 4th: 1.143, 5th: 0.867, 6th: 0.691, with a final drive ratio of 3.539) remained an option.

An unusual sight in the engine compartment was the addition of water cooling for the 190 Amp alternator.

B6 Brakes, wheels and tires

B6 S4 brakes consisted of radially ventilated discs front and rear, the fronts sized at in diameter by thick, and rears at x . Single-piston sliding brake calipers front and rear clamped the discs. A Bosch 5.7/ESP system (complete with anti-lock braking system (ABS), electronic brakeforce distribution (EBD), Emergency Brake Assist
Emergency Brake Assist

Emergency Brake Assist is a safety system in vehicles designed to ensure maximum braking power is used in an Emergency stop situation. By interpreting the speed and force with which the brake pedal is pushed, the system detects if the driver is trying to execute an emergency stop, and if the brake pedal is not fully applied, the system overr...
 (EBA), Electronic Differential Lock (EDL) and Anti-Slip Regulation (ASR) - also known as traction control system), coupled with a dual-rate tandem vacuum servo
Vacuum servo

A vacuum servo is a component used on motor vehicles in their brake system, to provide assistance to the driver by increasing the braking effort....
 provided the hydraulics.

Standard alloy wheels were Avus-III die-cast
Die casting

Die casting is the process of forcing molten metal under high pressure into mold cavities . Most die castings are made from non-ferrous metals, specifically zinc, copper, aluminium, magnesium, lead, and tin based alloys, although ferrous metal die castings are possible....
 aluminium alloy, 8Jx18" ET45 in size, and shod with 235/40ZR18 95Y ExtraLoad high performance tyres, being either Continental
Continental AG

Continental Aktiengesellschaft , internally often called Conti for short, is a worldwide leading manufacturer of tires, brake systems, vehicle stability control systems, engine injection systems, tachographs and other parts for the automotive and transport industries....
 ContiSportContact2 or Michelin
Michelin

Michelin based in Clermont-Ferrand in the Auvergne r?gion of France, is primarily a tire manufacturer, currently the world's second largest....
 Pilot Sport PS2.

B6 Body and interior

Discrete lower door trims, along with the vertical-emphasis line grille, and solid aluminium alloy (later replaced with mock aluminium plastic) exterior mirrors, and S4 badging front and rear are all that visually distinguish the S4 from its related A4 brethren. Interior, fully electric Recaro
Recaro

RECARO GmbH & Co. KG, commonly known as Recaro, is a Germany company based in Kirchheim unter Teck in the vicinity of Stuttgart, known for their automobile bucket seats....
 seats, and carbon fibre trims, complete with S4 logos in the instrument panel complete the detail.

B7 (Typ 8E/8H, 2006-2008)


The Audi B7 platform S4 quattro, based on the B7 Audi A4
Audi A4

The Audi A4 is a compact executive car produced by the Germany automaker Audi since 1994. The first generation A4 succeeded the Audi 80.It is available as a sedan or a station wagon ....
, debuted in late 2005. Although Audi classifies it as a new car, the differences between it and the outgoing B6 S4 casually appear to be primarily cosmetic, and is still classified by the internal designation: Typ 8E (although with revised sub-designations - saloon: 8EC, Avant: 8ED, and Cabriolet: 8HE). It has the same 4.2 litre V8 engine as the B6 S4, producing at 7000 rpm, and at 3500 rpm.

There are a few mechanical changes, such as revised springs and dampers and an updated centre Torsen T-3 differential, featuring a default asymmetric 40:60 front-rear torque split on manual transmission quattro models, along with the later Bosch ESP 8.0 Electronic Stability Programme. The Avus-III wheels still available, with an option of an alternative 18 inch 7-spoke forged alloy wheel.

Bose
Bose

Bose may refer to:* Bose Corporation, an audio company* Bose-Einstein condensate, a state of matter predicted by Satyendra Bose and Albert Einstein...
 sound system is now standard, whereas it was optional on the B6 S4, and an enhanced optional DVD-ROM
DVD

DVD, also known as "Digital Versatile Disc" or "Digital Video Disc,"is a popular optical disc data storage device media format. Its main uses are video and data storage....
-based RNS-E satellite navigation system replaces the previous CD-ROM
CD-ROM

CD-ROM is a pre-pressed Compact Disc that contains Computer data storage accessible to, but not writable by, a computer. While the Compact Disc format was originally designed for music storage and playback, the 1985 Yellow Book standard developed by Sony and Philips adapted the format to hold any form of Binary file....
-based (RNS-D) option.

The new trapezoid
Trapezoid

In geometry, a trapezoid or trapezium is a quadrilateral with twoparallel sides. The term “trapezoid” is used in North America, while the term “trapezium” is prevalent in Britain....
al single-frame grille, bi-xenon
Xenon arc lamp

A xenon arc lamp is an Lighting source. Powered by electricity, it uses ionized xenon gas to produce a bright white light that closely mimics natural daylight....
 HID
High-intensity discharge lamp

A High-intensity discharge lamp is a type of electric light which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube....
 headlamps, L-shaped tail-lamps, quad exhaust tips, and discrete V8 badging below the side repeater indicators help distinguish the B7 from the previous B6 model.

Audi S4 25quattro

2006 Audi S4 25quattro
In 2005, Audi announced a limited edition run of 250 special edition S4 saloon cars, celebrating 25 years of quattro four wheel drive. This exclusive model was called the Audi S4 25quattro. Available only in the US, in Avus Silver, the exterior has unique front and rear bumpers, a carbon fibre
Carbon fiber

Carbon fiber or is a material consisting of extremely thin fibers about 0.005?0.010 mm in diameter and composed mostly of carbon atoms. The carbon atoms are bonded together in microscopic crystals that are more or less aligned parallel to the long axis of the fiber....
 boot lip spoiler and lower front splitter. 15-spoke DTM alloys, along with optional dealer-fitted Audi rings decals for the front doors complete the exterior makeover. Black and grey contrasting interior leathers, along with "quattro" embossed into the Recaro
Recaro

RECARO GmbH & Co. KG, commonly known as Recaro, is a Germany company based in Kirchheim unter Teck in the vicinity of Stuttgart, known for their automobile bucket seats....
 seats, together with an individually numbered exclusive quattro gear shift knob for the manual-only gearbox define the interior changes.

On the mechanical side, the S4 25quattro was the second Audi, after the B7 RS4 to be fitted with the latest Torsen T-3 asymmetric centre differential for its quattro permanent four-wheel drive system. Under normal grip conditions, this is set with a default rearwards torque distribution bias of 40:60 front to rear, and a maximum of 100% torque can automatically be apportioned to the rear axle (and up to 80% to the front) as conditions warrant. The final drive ratios are 3.889.

B8 (Typ 8K, 2009-)


The latest generation of the Audi S4 quattro (Typ 8K) will be based on the current Audi B8 A4
Audi A4

The Audi A4 is a compact executive car produced by the Germany automaker Audi since 1994. The first generation A4 succeeded the Audi 80.It is available as a sedan or a station wagon ....
, built on the Volkswagen Group MLB/MLP
Volkswagen B platform

The Volkswagen Group B platform is a mid-size car automobile platform from the Volkswagen Group. It has been used for coup?s, sedan , and station wagon, under the Volkswagen, Audi and ?koda Auto marques over the years....
 platform.

The B8 S4 will revert back to a smaller displacement engine with forced induction, utilising a 3.0 litre TFSI supercharged V6
V6 engine

A V6 engine is a V engine with six cylinder s mounted on the crankcase in two banks of three cylinders, usually set at either a right angle or an acute angle to each other, with all six pistons driving a common crankshaft....
 with Fuel Stratified Injection
Gasoline direct injection

Gasoline direct injection is a latest variant of fuel injection employed in modern two-stroke cycle and Four-stroke cycle stroke petrol engines....
, from the facelifted Audi A6
Audi A6

The Audi A6 is an executive car car produced by the Germany automaker Audi. It is available in sedan and station wagon body styles. The second and third generation A6 were also used as the basis for the Audi allroad quattro and A6 allroad quattro models respectively....
, and tuned to produce and and of torque. This engine is mated to either a 6-speed manual or a 7-speed S-Tronic
Direct-Shift Gearbox

Direct-Shift Gearbox ), or DSG, is a Volkswagen Group developed electronically controlled multiple-shaft twin-clutch gearbox manual gearbox - without a conventional clutch pedal, with full automatic, or semi-manual control....
 dual clutch transmission.

Acceleration from standstill to 100 km/h is claimed to take 5.1 seconds for the saloon, with the Avant one tenth of a second slower at 5.2 seconds. Top speed will be electronically limited to 250kmh (155mph).

See also

  • Audi Ur-S4 / Ur-S6
  • Audi S and RS models
    Audi S and RS models

    Audi S and RS models are a range of high performance orientated automobile, of certain Audi model ranges, from the Germany automotive industry company, Audi AG....


External links

  • international corporate portal