When FISA restructured the International Sporting Code's production car categories in 1982, Group A sat above Group N — for essentially standard production cars — and below the relatively unrestricted Group B. Group A required 5,000 identical production models to be built within 12 consecutive months before a car could be approved for competition, a threshold reduced to 2,500 from 1993. Evolution variants required an additional 500 units in some definitions. Once homologated, cars could continue competing for seven years after the model went out of production.
The regulations limited power outputs, restricted technology, and mandated production-derived bodyshells. Forced induction engines were subject to an equivalence factor. These constraints were intended to keep costs manageable and fields large, in contrast to the bespoke space-frame cars that had come to characterise Group B.
Australia negotiated a reduced homologation threshold of 1,000 base models with the Confederation of Australian Motor Sport due to the smaller domestic car market. Holden was the only Australian manufacturer to take advantage of this arrangement, homologating various V8 Commodore models through first Peter Brock's HDT Special Vehicles and later Holden Special Vehicles.
Group A became the sole top-level formula in the WRC from 1987, following the catastrophic 1986 season that ended Group B. The representative cars of the Group A WRC era included the Lancia Delta Integrale — which dominated the early years of the class — and later the Toyota Celica GT-Four, Subaru Impreza WRX, Ford Escort RS Cosworth, Mitsubishi Lancer Evolution, and Nissan Pulsar GTI-R.
Despite producing far less power than their Group B predecessors, Group A rally cars surpassed Group B times on many events by 1990, owing to superior handling and traction. The turbocharged, four-wheel-drive cars developed progressively through the late 1980s and 1990s as manufacturers pushed within the remaining technical freedom.
The formula ran in the WRC manufacturers' championship until 1997, when the FIA introduced the World Rally Car specification as the new top-level formula. Group A cars could continue to enter individual WRC rallies as late as 2018 and remain eligible in FIA regional rally championships. The last car to use Group A homologation in the WRC manufacturers' championship was the Mitsubishi Lancer Evolution VI.
Group A was used extensively in touring car racing across Europe, Australia, Asia, and New Zealand throughout the 1980s and into the early 1990s. In European competition, cars were divided into three displacement divisions: over 2,500 cc, 1,600–2,500 cc, and under 1,600 cc. Notable vehicles included the BMW M3, BMW 635 CSi, Ford Sierra Turbo, Jaguar XJS, Volvo 240 Turbo, Rover Vitesse, various Nissan Skylines including the twin-turbo GT-R, Toyota Corolla and Supra Turbo A, and multiple Holden Commodore variants.
The British Touring Car Championship ran under Group A from 1983 to 1990, the European Touring Car Championship from 1982 to 1988, the Deutsche Tourenwagen Meisterschaft from 1984 to 1992, and the Australian Touring Car Championship from 1985 to 1992. The Japanese Touring Car Championship ran Group A until 1994. When DTM and most national touring car series abandoned the formula in the early 1990s for dedicated two-litre supertouring regulations or proprietary class formulas, many displaced cars migrated to other series — redundant Nissan Skylines in particular found a second life in the JGTC alongside purpose-built GT cars.
Australia's Group A touring car programme had particular significance. The domestic formula was renamed Group 3A Touring Cars from 1988 and continued until 1993, when CAMS introduced a new formula permitting five-litre V8 cars and two-litre machinery — categories that would eventually become V8 Supercars and Super Touring respectively. Today Group A is a historic class in Australian motorsport.
Group A's 35-year run across multiple disciplines makes it one of the most durable regulatory frameworks in FIA history. In rallying it provided a decade of fierce competition between manufacturers who invested heavily in four-wheel-drive turbocharged technology on road-legal vehicles. Cars such as the Lancia Delta Integrale, Subaru Impreza WRX, and Mitsubishi Lancer Evolution became icons not only of rallying but of performance road car culture, directly linking competitive success on stages to consumer desirability in showrooms. In sim racing, the Group A era is well represented across rally and touring car titles for its combination of accessible car counts, genuine manufacturer variety, and the distinct handling character of turbocharged four-wheel-drive road cars pushed to regulatory limits.