![]() Class C: normally aspirated two-wheel drive cars complying with 1992 CAMS Group 3A Touring Car regulations: This class would only be eligible in 1993.Class B: 2.0-litre cars complying with FIA Class II Touring Car regulations.Class A: Australian-produced 5.0-litre V8-engined Fords and Holdens. ![]() In June 1992, the class structure was confirmed: In 1992, CAMS looked at closing the performance gap between the classes, only to have protests from Ford and Holden, which did not want to see their cars beaten by the smaller cars. The new rules for the ATCC were announced in November 1991 and indicated that the V8 cars would be significantly faster than the smaller-engined cars. However, CAMS was waiting to see what the FIA did with its proposed international formula for 2.5- and 2.0-litre touring cars. With the new regulations set to come into effect in 1993, Ford and Holden were both keen to know the details of the new formula by the end of 1991, putting pressure on the Confederation of Australian Motor Sport (CAMS) to provide clarity on the matter. The concept of a formula centred around V8-engined Fords and Holdens for the Australian Touring Car Championship had been established as early as mid-1991. Holden announced its final year of competition in 2022, to be replaced by the Chevrolet Camaro for the 2023 season. The series returned to a Ford and Holden duopoly in 2020 with the departure of Nissan, while Ford replaced the Falcon with the Mustang in 2019. Nissan were the first new manufacturer to commit to the series with four Nissan Altima 元3s followed briefly by Erebus Motorsport with Mercedes-Benz E63 AMGs and Garry Rogers Motorsport with Volvo S60s. Originally only for Ford Falcons and Holden Commodores, the new generation V8 Supercar regulations, introduced in 2013, opened up the series to more manufacturers. All cars currently use 5.0-litre naturally aspirated V8 engines, but since 2017 have had the option of using four and six cylinder engines, as well as turbochargers. To ensure parity between each make of car, many control components are used. Cars are custom made using a control chassis, with only certain body panels being common between the road cars and race cars. The vehicles used in the series are loosely based on road-going cars. The series is broadcast in 137 countries and has an average event attendance of over 100,000, with over 250,000 people attending major events such as the Adelaide 500. Race formats vary between each event, with sprint races between 100 and 200 kilometres (62 and 124 mi) in length, street races between 125 and 250 kilometres (78 and 155 mi) in length, and two-driver endurance races held at Sandown, Bathurst, and the Gold Coast. A Melbourne 400 championship event is also held in support of the Australian Grand Prix. An international round is held in New Zealand, while events have previously been held in China, Bahrain, the United Arab Emirates, and the United States. Supercars events take place in all Australian states and the Northern Territory, with the Australian Capital Territory formerly holding the Canberra 400. The Supercars Championship is a touring car racing category in Australia, running as an International Series under Fédération Internationale de l'Automobile (FIA) regulations, governing the sport. Touring car racing category in Australasia
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