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Group 4 (motorsport)

(Redirected from Group 4 GT cars)

Group 4 referred to regulations for sportscars and grand touring (GT) cars used in racing and rallying, as regulated by the FIA. The group was introduced in 1954 and was replaced by Group B for the 1982 season.

A Ford GT40 contesting the Group 4 Sports Car category at the 1969 1000 km Nürburgring
A Group 4 Porsche 906
A Group 4 Alpine A110 1800
A Group 4 De Tomaso Pantera GTS
BMW M1 Procar, used in the M1 Procar Championship. These cars were designed and built to FIA Group 4 racing specifications.

Production requirements

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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.[1][2] 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 requirement was reduced to 25 units for the 1969 season.[3]

For 1969, Appendix J of the FIA International Sporting Code defined groups for Touring cars, Grand Touring cars and Sports cars as follows: (numbers between brackets are required minimum production in 12 consecutive months).[4]

  • Group 1: series-production touring cars (5,000)
  • Group 2: 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

For 1970, the limited production sports car category was renamed from Group 4 to Group 5[5] and, in the same year,[6] Group 4 became the class for special grand touring cars with minimum production of 500 in 12 consecutive months [7]

For 1971, the relevant FIA classifications were as follows:[7]

  • 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 (25)
  • Group 6: prototype-sports cars

In 1976, the Group 4 production requirement was reduced to 400 in 24 months.[8]

Sports car racing

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A Porsche 911 competing in the Group 4 Special Grand Touring Car category at the 1970 1000 km Nürburgring

In 1966 and 1967 the Group 4 Sports Cars played a supporting role to the Group 6 prototypes. While prototypes like the 7.0L Ford GT40 Mk II and the Mk IV raced for outright victories, the 4.7L GT40 Mk I entries were competing for Group 4 class wins.[9] Indeed, competitors in the two categories were competing for two different championships, the Group 6 cars for the International Championship for Sports-Prototypes and the Group 4 cars for the International Championship for Sports Cars. In 1968, the rules were changed, so that prototypes were limited to 3.0L, but Sports cars of up to 5.0L could still be entered. It was also announced that the minimum production figure for the Group 4 sports cars would be reduced to 25 cars for 1969. With larger engines than the prototypes, the Group 4 cars were now in contention for outright race wins. The Ford GT40 was the winner at Le Mans in both 1968 and 1969. Porsche began work on a production run of 25 cars for the Porsche 917. Ferrari, with some financial help from Fiat, produced the similar Ferrari 512.[10]

For the 1970 season, the Group 4 Sports car category was renamed and became Group 5 Sports Cars and Group 4 designation was applied to a new Special Grand Touring category. The new Group 4 was contested by production based cars such as the Ferrari 365 GTB/4 Daytona, Porsche 911 Carrera RS and the De Tomaso Pantera.

The Group 4 GT category was replaced by a new Group B GT class for 1983.[11]

Rallying

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Roberto Cambiaghi and Emanuele Sanfront on a Fiat 124 Abarth Rally at the Rally delle Regioni 1975 (valid for European Rally Championship)
 
Fiat Abarth 124 rally
 
A Group 4 De Tomaso Pantera and Lancia Stratos, pictured in 1973
 
Group 4 Lancia Stratos HF. The Stratos helped Lancia win the World Rally Championship in 1974, 1975 and 1976.
 
Fiat 131 Abarth Group 4 rally (1982)

The Group 4 regulations were also used as the basis for the World Rally Championships until they were replaced by the Group B regulations. In mid 1970s to early 1980s rallying, it was necessary to produce 400 identical cars for homologation as a Group 4 rally car. Notable cars included the Ford Escort RS1800, Fiat 131 Abarth, Lancia Stratos HF and the Audi Quattro.

List of FIA Group 4 homologated cars

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No. Marque Model Type Start End
220   Shelby Cobra Roadster 427 January 2, 1966 January 2, 1966
221   Matra Djet 5S MB 8S January 1, 1965 January 1, 1965
222   Alpine A110 1300 February 1, 1966 February 1, 1966
223   Panhard 24 BA February 1, 1966 February 1, 1966
224   Ford GT40 February 2, 1966 February 2, 1966
225   Ferrari 250 LM Berlinetta February 1, 1966 February 1, 1966
227   Ford Taunus P5 Hardtop April 15, 1966 April 15, 1966
228   Tunex Diva GT April 16, 1966 April 16, 1966
229   Abarth 1300 OT April 15, 1966 April 15, 1966
230   Abarth 1000 OTR Coupé April 30, 1966 April 30, 1966
231   Saab Sonett II
234   Ferrari 275 GTB 4 April 1, 1967 April 1, 1967
235   Lamborghini 350 GT April 1, 1967 April 1, 1967
236   Lamborghini 400 GT 2+2 April 1, 1967 April 1, 1967
237   TVR MkIV 1800S July 1, 1967 July 1, 1967
238   Lotus Mark 47 January 1, 1969 January 1, 1969
239   Ferrari 308 GTB 4 April 1, 1967 April 1, 1967
240   Lola T70 Mk III February 1, 1968 February 1, 1968
241   Abarth 1000 SP March 1, 1969 March 1, 1969
242   Marcos 1300 GT March 1, 1968 March 1, 1968
242   Lamborghini Urraco P250 July 1, 1975 December 31, 1981
244   Chevron GT May 1, 1968 May 1, 1968
245   Lamborghini P400 Miura June 1, 1968 June 1, 1968
246   Alfa Romeo 33 Spider January 1, 1969 January 1, 1969
247   Ferrari 206 GT January 1, 1969 January 1, 1969
248   McLaren M6 GT August 20, 1968
249   Porsche 910 January 1, 1969 January 1, 1969
250   Porsche 917 May 1, 1969 May 1, 1969
251   De Tomaso Mangusta April 1, 1969 April 1, 1969
252   Abarth 2000 April 1, 1969 April 1, 1969
253   Ferrari 365 GTB 4 Daytona June 1, 1969 June 1, 1969
254   Ferrari 512 S July 1, 1969 April 1, 1970
255   Chevron B16 Cosworth January 2, 1970 January 2, 1970
624   Alpine A110 1600 January 1, 1970 December 31, 1970
625   Alfa Romeo GTA Sprint January 1, 1970 December 31, 1977
626   Porsche 914/6 March 1, 1970 October 1, 1971
627   Ferrari 246 GT January 1, 1971 February 1, 1973
628   Citroën SM Type SB April 1, 1971 July 1, 1971
629   Range Rover Classic April 1, 1971 January 1, 1972
630   Renault 12 Gordini R1173 October 1, 1971 January 1, 1972
632   De Tomaso Pantera January 1, 1972 July 1, 1972
633   Ferrari 365 GTB 4 January 1, 1972 December 31, 1979
634   Lotus Europa Twin Cam April 1, 1972 July 1, 1972
637   Porsche Carrera RS March 1, 1973 July 1, 1973
638   Renault 17 TS April 1, 1974 October 1, 1974
639   Maserati AM122 Merak May 1, 1974 December 31, 1981
646   Aston Martin V8 April 1, 1976 December 31, 1981
631   Alfa Romeo Montreal January 1, 1972 April 1, 1972
640   Lancia Stratos HF October 1, 1974 December 31, 1981
644   Opel Kadett C GT/E October 1, 1975 February 1, 1976
645   Porsche 911 Turbo January 1, 1976 January 1, 1977
647   Abarth 131 Rally April 1, 1976 December 31, 1981
648   Ferrari 308 GTB November 1, 1976 December 31, 1981
649   Vauxhall Chevette HS2300 November 1, 1976 December 31, 1981
650   Ford Escort RS April 2, 1977 January 1, 1982
651   Alpine A310 V6 April 1, 1977 January 1, 1978
652   Saab 99 Turbo Combi Coupé January 1, 1978 October 1, 1978
653   Lotus Esprit April 1, 1978 December 31, 1981
654   B.L. Triumph TR8 April 1, 1978 December 31, 1981
655   Panther Lima October 1, 1978 December 31, 1981
656   FSO Polonez 125 PN January 1, 1979 April 1, 1980
657   FSO Polonez January 1, 1979 April 1, 1980
658   Saab 99 Turbo Sedan February 1, 1979 April 1, 1979
659   Audi 80 1600 February 1, 1979 December 31, 1981
660   Porsche 924 Turbo February 1, 1979 April 1, 1979
661   Daimler-Benz 450 SLC 5.0 April 1, 1979 December 31, 1981
662   Chrysler Sunbeam Lotus April 1, 1979 January 1, 1980
663   Toyota Celica 2000GT Rally RA45 June 1, 1979 December 31, 1981
664   Renault Argentina 12 Alpine July 1, 1979 December 31, 1981
665   Morgan Plus 8 July 1, 1979 December 31, 1981
666   Opel Ascona 400 November 1, 1979 December 31, 1981
668   Alfa Romeo Alfetta Turbodelta February 1, 1980 December 31, 1981
669   Renault 5 Turbo September 1, 1980 April 1, 1981
670   BMW M1 December 1, 1980 December 31, 1981
671   Audi Quattro 2145 January 2, 1981 January 1, 1982
672   Porsche 924 Carrera GT January 1, 1981 December 31, 1981
673   Daimler-Benz 500 SL January 1, 1980 December 31, 1981
674   Alfa Romeo Alfetta GT 6 2.5 January 1, 1981 October 1, 1981
675   Mitsubishi Lancer 2000 Turbo A176A April 1, 1981 December 31, 1981
676   Talbot Matra Murena 2.2 August 1, 1981 December 31, 1981
677   Volkswagen Golf Mk I 16S December 1, 1981 December 31, 1981

In addition, cars were homologated for Group 4 as variants of Group 3 cars. Before 1976, this was possible using a "100-off rule":[12] clause bb of Art 260 of Appendix J to the FIA's International Sporting Code 1975 (invoked from Art 266). This rule only required production of 100 of a "bolt-on option kit" of parts, not the production of any modified cars as homologation specials, but was deleted after 1975 and approved components banned "Effective from the end of 1977".[13] Such an approval applies to the Group 4 16-valve TR7,[12] the multi-valve head (and other parts) from the Group 1 Dolomite Sprint being approved as "valid for Group 4" on 1 Oct. 1975 in amendment 1/1V to the Group 3 TR7 homologation papers and reapproved (following production of about 60 16-valve TR7 Sprints in 1977) on 1 Feb. 1978 in amendment 10/8v.[14]

Groups 1-9

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Categories and Groups of Appendix J 1954 - 1965
Categories 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965
I. Touring A. Touring
II. Sports II. Grand Touring B. Grand Touring
- C. Sports
Group 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965
Group 1 Normal series production
Group 2 "Grand Touring" series prod Modified series prod Modified series prod
Group 3 Special series production Grand Touring Cars
Group 4 Series production Normal GT series prod Sports Car
Group 5 International Modified GT series prod -
Group 6 - GT specials -
Source:[15][16]
Categories and Groups of Appendix J 1966 - 1981 (Production requirement)
Categories 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981
A. Production
B. Special B. Experimental Competition B. Racing Cars
C. Racing Cars -
Group 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981
Group 1 Series Touring (5000)
Group 2 Touring (1000) Special Touring (1000)
Group 3 Grand Touring (500) Series Grand Touring (1000)
Group 4 Sportscars (50/25) Special Grand Touring (500) Grand Touring (400)
Group 5 Special Touring Cars Sports cars (50) Sports cars Special cars derived from Groups 1-4
Group 6 Prototype sportscars - Two-seater racecars
Group 7 Two-seater racecars International formula
Group 8 Formula racing cars International formula Formula libre racing cars
Group 9 Formula libre racing cars -
Source:[15][16]
Note: Special may be replaced with Competition in some official documents.

See also

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References

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  1. ^ Article 252 of the FIA’s Appendix J regulations, 1962 Archived 2006-03-14 at the Wayback Machine Retrieved from www.fia.com on 11 February 2009
  2. ^ Article 252 of the FIA’s Appendix J regulations, 1965 Archived 2009-07-11 at the Wayback Machine Retrieved from www.fia.com on 11 February 2009
  3. ^ M.L. Twite, The World's Racing Cars, 1971, page 109
  4. ^ Appendix J 1969, Art. 251, Art. 252 Archived 2006-10-17 at the Wayback Machine on www.fia.com
  5. ^ János L Wimpffen, Time and Two Seats, 1999, page 710
  6. ^ M.L. Twite, The World's Racing Cars, 1971, page 99
  7. ^ a b Appendix J 1971, Art. 251, Art. 252 Archived 2005-03-02 at the Wayback Machine on www.fia.com
  8. ^ Appendix J 1976, Art. 251, Art. 252 Archived 2006-03-14 at the Wayback Machine on www.fia.com
  9. ^ Ford GT40 MkI 289 Archived 2007-01-02 at the Wayback Machine on QV500.com
  10. ^ 1970 Ferrari 512 S Archived 2006-12-29 at the Wayback Machine on QV500.com
  11. ^ János L Wimpffen, Time and Two Seats, 1999, page 1347
  12. ^ a b Robson G., The Works Triumphs: 50 Years in Motorsport, 1993, J H Haynes & Co Ltd, ISBN 978-0854299263.
  13. ^ Robson G., "Ford Escort RS1800" Rally Giants, page 16, Veloce Publishing Ltd, 2008, ISBN 1845841409, 9781845841409.
  14. ^ RAC TR7 Homologation papers number 3071.
  15. ^ a b "Regulations - Period Appendix J | FIA Historic Database". historicdb.fia.com. Retrieved 2022-05-19.
  16. ^ a b "APPENDIX K TO THE INTERNATIONAL SPORTING CODE" (PDF).
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