JTS engine
Encyclopedia
The JTS engine is a gasoline direct injection
engine produced by Alfa Romeo
. It exists in two forms, straight-4
and V6, and was introduced into the Alfa lineup in 2002.
. The engine was based on the 2.0 Twin Spark
, replacing Twin Spark with direct injection, dubbed "Jet Thrust Stoichiometric". This improved power from 114 kW (155 PS) to 121 kW (165 PS), but more importantly, torque climbed from 187 Nm (137 ft.lbf) to 206 Nm (151 ft.lbf). In 2003, this engine was introduced to the GTV/Spider
coupé and roadster.
In spite of its benefits to power, torque and economy, the JTS was not used in the smaller 147 or the larger 166 , and much less in other models from the Fiat Group. This was allegedly because the JTS engine cost a lot more to produce than the Twin Spark.
Applications:
Applications:
With the arrival of 159 was also introduced 2.2 JTS, the engine block is sourced from GM (GM Family II L61).
Applications:
, but is instead a derivation of the GM High Feature engine
, built in Australia by GM Holden, modified by Alfa and capable of generating 191 kW (260 PS), a number matching the larger 3.6 L variant used by GM. Alfa's engine is equipped with cam-phasing (variable valve timing
) on both inlet and exhaust sides, thus the name "TwinPhaser". Camshafts are driven by chain. The 3.2 JTS engine has a 89 mm (3.5 in) bore and a 85.6 mm (3.4 in) stroke.
Applications:
Gasoline direct injection
In internal combustion engines, gasoline direct injection , also known as petrol direct injection or direct petrol injection, is a variant of fuel injection employed in modern two-stroke and four-stroke gasoline engines...
engine produced by Alfa Romeo
Alfa Romeo
Alfa Romeo Automobiles S.p.A. is an Italian manufacturer of cars. Founded as A.L.F.A. on June 24, 1910, in Milan, the company has been involved in car racing since 1911, and has a reputation for building expensive sports cars...
. It exists in two forms, straight-4
Straight-4
The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....
and V6, and was introduced into the Alfa lineup in 2002.
2.0
The JTS engine debuted in 2002 in the Alfa Romeo 156Alfa Romeo 156
The Alfa Romeo 156 is a compact executive car introduced by Italian automaker Alfa Romeo at the 1997 Frankfurt Motor Show as the replacement for the Alfa Romeo 155...
. The engine was based on the 2.0 Twin Spark
Alfa Romeo Twin Spark engine
Alfa Romeo Twin Spark technology was used first time in Alfa Romeo Grand Prix car in 1914. In the early 1960s it was used in their race cars to enable it to achieve a higher power output from its engines...
, replacing Twin Spark with direct injection, dubbed "Jet Thrust Stoichiometric". This improved power from 114 kW (155 PS) to 121 kW (165 PS), but more importantly, torque climbed from 187 Nm (137 ft.lbf) to 206 Nm (151 ft.lbf). In 2003, this engine was introduced to the GTV/Spider
Alfa Romeo GTV & Spider
The Alfa Romeo GTV and Alfa Romeo Spider were two sports cars produced by the Italian manufacturer Alfa Romeo from 1995 to 2006....
coupé and roadster.
In spite of its benefits to power, torque and economy, the JTS was not used in the smaller 147 or the larger 166 , and much less in other models from the Fiat Group. This was allegedly because the JTS engine cost a lot more to produce than the Twin Spark.
- Displacement: 1970 cc
- Power: 121 kW @6400 rpm
- Torque: 206 newton metre @3250 rpm
Applications:
- 2002-2005 Alfa Romeo 156Alfa Romeo 156The Alfa Romeo 156 is a compact executive car introduced by Italian automaker Alfa Romeo at the 1997 Frankfurt Motor Show as the replacement for the Alfa Romeo 155...
- 2003-2005 Alfa Romeo GTVAlfa Romeo GTV & SpiderThe Alfa Romeo GTV and Alfa Romeo Spider were two sports cars produced by the Italian manufacturer Alfa Romeo from 1995 to 2006....
- 2003-2005 Alfa Romeo SpiderAlfa Romeo GTV & SpiderThe Alfa Romeo GTV and Alfa Romeo Spider were two sports cars produced by the Italian manufacturer Alfa Romeo from 1995 to 2006....
- 2004–present Alfa Romeo GTAlfa Romeo GTThe Alfa Romeo GT is a sports car produced by the Italian automaker Alfa Romeo between 2003 and 2010. A total of 80,832 units were produced. The GT was introduced in March 2003 Geneva Motor Show and it came for sale in Italian markets January 2004...
1.9
It was only in 2005, with the arrival of the 159, that more variants of the JTS were produced. The 2.0 JTS gave way to a 1.9 L variant with 118 kW (160 PS) and a 2.2 L version with 136 kW (185 PS). The 1.9JTS and 2.2JTS form part of a new engine family and are completely different from the 2.0JTS. Both 1.9 L and 2.2 L have chain driven camshafts and variable valve timing on both inlet and exhaust camshafts. Both current 1.9 and 2.2 JTS engine blocks are supplied by GM to the Fiat group. Both models are mapped to either a six speed manual gearbox plus a reverse gear, or a Formula One inspired sequential gearbox also having six gears and reverse.- Displacement: 1859 cc
- Power: 118 kW @6500 rpm
- Torque: 190 newton metre @4500 rpm
Applications:
- 2005–present Alfa Romeo 159Alfa Romeo 159The Alfa Romeo 159 is a compact executive car produced by the Italian manufacturer Alfa Romeo between 2005 and 2011. The 159 was introduced in production form at the 2005 Geneva Motor Show as a replacement for the successful Alfa Romeo 156. The 159 uses the GM/Fiat Premium platform, shared with...
2.2
- Displacement: 2198 cc
- Power: 136 kW @6500 rpm
- Torque: 230 newton metre @4500 rpm
Applications:
- 2005–2010 Alfa Romeo 159Alfa Romeo 159The Alfa Romeo 159 is a compact executive car produced by the Italian manufacturer Alfa Romeo between 2005 and 2011. The 159 was introduced in production form at the 2005 Geneva Motor Show as a replacement for the successful Alfa Romeo 156. The 159 uses the GM/Fiat Premium platform, shared with...
- 2005–2010 Alfa Romeo BreraAlfa Romeo BreraThe Alfa Romeo Brera is a sports car produced by the Italian automaker Alfa Romeo between 2005 and 2010. The Spider roadster was produced between 2006 to 2010. Both cars were manufactured by Pininfarina. Only 12,488 units of Spider and 21,786 units of Brera were built. Production of both models...
- 2006–2010 Alfa Romeo SpiderAlfa Romeo BreraThe Alfa Romeo Brera is a sports car produced by the Italian automaker Alfa Romeo between 2005 and 2010. The Spider roadster was produced between 2006 to 2010. Both cars were manufactured by Pininfarina. Only 12,488 units of Spider and 21,786 units of Brera were built. Production of both models...
3.2
The JTS direct injection system was first used in a V6 engine in 2005 with the introduction of the Alfa 159 and Brera. This is not related to the Alfa Romeo V6 engineAlfa Romeo V6 engine
Alfa Romeos in-house V6 engine design made its initial début in 1979 in the Alfa 6. Introduced in 2.5 L guise, production engines would eventually range from 2.0 L to 3.2 L displacement. With modifications it is possible to increase engine displacement to...
, but is instead a derivation of the GM High Feature engine
GM High Feature engine
The 3600 LY7 are members of General Motors' new High Feature engine family of modern DOHC V6s. This new family of engines was introduced in 2004 with the Cadillac CTS. Holden sells the HFV6 under the name Alloytec. The High Feature moniker on the Holden produced engine is reserved for the twin...
, built in Australia by GM Holden, modified by Alfa and capable of generating 191 kW (260 PS), a number matching the larger 3.6 L variant used by GM. Alfa's engine is equipped with cam-phasing (variable valve timing
Variable valve timing
In internal combustion engines, variable valve timing , also known as Variable valve actuation , is a generalized term used to describe any mechanism or method that can alter the shape or timing of a valve lift event within an internal combustion engine...
) on both inlet and exhaust sides, thus the name "TwinPhaser". Camshafts are driven by chain. The 3.2 JTS engine has a 89 mm (3.5 in) bore and a 85.6 mm (3.4 in) stroke.
- Displacement: 3195 cc
- Power: 191 kW @6200 rpm
- Torque: 322 newton metre @3800 rpm
Applications:
- 2004 Alfa Romeo ViscontiAlfa Romeo ViscontiThe Alfa Romeo Visconti is a concept car made by Italian car manufacturer Alfa Romeo, designed by Giorgetto Giugiaro.The car was seen for the first time at the Geneva Motor Show in 2004. The car is a four door coupé and is almost long...
(concept car) - 2005–2010 Alfa Romeo 159Alfa Romeo 159The Alfa Romeo 159 is a compact executive car produced by the Italian manufacturer Alfa Romeo between 2005 and 2011. The 159 was introduced in production form at the 2005 Geneva Motor Show as a replacement for the successful Alfa Romeo 156. The 159 uses the GM/Fiat Premium platform, shared with...
- 2005–2010 Alfa Romeo BreraAlfa Romeo BreraThe Alfa Romeo Brera is a sports car produced by the Italian automaker Alfa Romeo between 2005 and 2010. The Spider roadster was produced between 2006 to 2010. Both cars were manufactured by Pininfarina. Only 12,488 units of Spider and 21,786 units of Brera were built. Production of both models...
- 2006–2010 Alfa Romeo SpiderAlfa Romeo BreraThe Alfa Romeo Brera is a sports car produced by the Italian automaker Alfa Romeo between 2005 and 2010. The Spider roadster was produced between 2006 to 2010. Both cars were manufactured by Pininfarina. Only 12,488 units of Spider and 21,786 units of Brera were built. Production of both models...