The FIA introduced the Group A touring car regulations in 1982. Group A required that 2500 vehicles had to be produced in a 12 month period, for specific parts to be homologated, and that a special 'Evolution' of just 500 vehicles could be produced separate of the initial 2500.
Group A was first introduced in 1983, in the British Saloon Car Championship (1983-90), but then quickly spread to Germany (1984-92), Australia (1985-92), Japan (1985-93), and New Zealand (1984-92). Additionally was the European Touring Car Championship, held from 1983-88, and the World Touring Car Championship, which took place in 1987.
It was broken into three classes, based on engine size: 0-1,600cc, 1,601-2,500cc, and over 2,500cc. Weight formula's were used based on the production vehicle.
More than 60 different vehicle models were homologated for Group A, although as manufacturers sought to produce evolution models specifically for the formula, the racing became dominated by a single marque. The Ford Sierra RS500 dominated from 1988, the Nissan Skyline R32 from 1990.
But regardless, Group A produced some exciting racing, and some memorable cars. The 1984-86 period was possibly the most competitive, with Ford Sierra (XR4i), Volvo (240T), Jaguar (XJS), Rover (Vitesse), BMW (635CSi), and Holden (Commodore) all enjoying race winning success in the various countries the formula was used during this period, and no single marque appeared to dominate.
With all the Group A photos and stories appearing on The Roaring Season, this seems like a good time to start a thread dedicated to this formula.
Photo above courtesy Nigel Watts.