Group 4 (motorsport)

[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.

With larger engines than the prototypes, the Group 4 cars were now in contention for outright race wins.

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.

Notable cars included the Ford Escort RS1800, Fiat 131 Abarth, Lancia Stratos HF and the Audi Quattro.

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