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contesting the Group 4 Sports Car category at the 1969 1000 km Nürburgring]] The Group 4 racing class referred to regulations for cars in sportscar racing, GT racing and rallying
Rallying

Rallying is a form of motor competition that takes place on public or private roads with modified production or specially built road-legal cars....
, as regulated by the FIA
Fédération Internationale de l'Automobile

The F?d?ration Internationale de l'Automobile, commonly referred to as the FIA, is a non-profit association established as the Association Internationale des Automobile Clubs Reconnus on June 20, 1904 to represent the interests of motoring organisations and motor car users....
. The Group 4 class was replaced by Group B
Group B

The Group B referred to a set of regulations introduced in 1982 for competition vehicles in sportscar racing and rally racing regulated by the F?d?ration Internationale de l'Automobile....
 for the 1983 season.

r to 1966, the FIA’s Group 4 classification applied to Sports Cars which were in compliance with FIA Appendix C regulations.






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contesting the Group 4 Sports Car category at the 1969 1000 km Nürburgring]] The Group 4 racing class referred to regulations for cars in sportscar racing, GT racing and rallying
Rallying

Rallying is a form of motor competition that takes place on public or private roads with modified production or specially built road-legal cars....
, as regulated by the FIA
Fédération Internationale de l'Automobile

The F?d?ration Internationale de l'Automobile, commonly referred to as the FIA, is a non-profit association established as the Association Internationale des Automobile Clubs Reconnus on June 20, 1904 to represent the interests of motoring organisations and motor car users....
. The Group 4 class was replaced by Group B
Group B

The Group B referred to a set of regulations introduced in 1982 for competition vehicles in sportscar racing and rally racing regulated by the F?d?ration Internationale de l'Automobile....
 for the 1983 season.

Production requirements

Prior to 1966, the FIA’s Group 4 classification applied to Sports Cars which were in compliance with FIA Appendix C regulations. It also included recognised Series Touring Cars, Improved Touring Cars and Grand Touring Cars which had been modified beyond the respective Group 1, Group 2 or Group 3 regulations under which they had been homologated. In 1966, an overhaul of FIA categories saw Group 4 Sports Cars redefined such that they were now subject to a minimum production requirement of 50 units in 12 consecutive months and had to be fitted with all equipment necessary for use on public roads. A 5000cc engine capacity limit was applied for 1968 and the minimum production requirment was reduced to 25 units for the 1969 season.

For 1969, Appendix J of the FIA International Sporting Code defined groups for Touring cars
Touring car racing

Touring car racing is a general term for a number of distinct auto racing competitions in heavily-modified street cars. It is notably popular in United Kingdom, Germany, Scandinavia, and Australia....
, Grand Touring cars and Sports cars
Sports car

A sports car is a term used to describe a class of automobile. The exact definition varies, but generally it is used to refer to a low to ground, light weight vehicle with a powerful engine....
 as follows: (numbers between brackets are required minimum production in 12 consecutive months).

  • Group 1: series-production touring cars (5,000)
  • Group 2: special touring cars (1,000)
  • Group 3: grand touring cars (500)
  • Group 4: sports cars (25)
  • Group 5: special touring cars
  • Group 6: prototype-sports cars
    Group 6 (racing)

    Group 6 was the official designation applied by the F?d?ration Internationale de l'Automobile to two motor racing classifications, the Prototype-Sports Car category from 1966 to 1971 and the Two-Seater Racing Cars class from 1976 to 1982....


For 1970, the limited production sports car category was renamed from Group 4 to Group 5
Group 5 (racing)

Group 5 was an FIA motor racing classification which was applied to four distinct categories during the years 1966 to 1982. Initially Group 5 regulations defined a Special Touring Car category and from 1970 to 1971 the classification was applied to limited production Sports Cars restricted to 5 litre engine capacity....
  and, in the same year , Group 4 became the class for special grand touring cars with minimum production of 500 in 12 consecutive months

For 1971, the relevant FIA classifications were as follows:
  • Group 1: series-production touring cars (5,000)
  • Group 2: touring cars (1,000)
  • Group 3: series-production grand touring cars (1,000)
  • Group 4: special grand touring cars (500)
  • Group 5: sports cars
    Group 5 (racing)

    Group 5 was an FIA motor racing classification which was applied to four distinct categories during the years 1966 to 1982. Initially Group 5 regulations defined a Special Touring Car category and from 1970 to 1971 the classification was applied to limited production Sports Cars restricted to 5 litre engine capacity....
     (25)
  • Group 6: prototype-sports cars


In 1976, the Group 4 production requirement was reduced to 400 in 24 months.

Racing