AustralianFormula 1 was a motor sport category for open-wheeler racing cars which was current in Australia from 1970 to 1983. AF1 was introduced by the Confederation of Australian Motor Sport in 1970, initially restricting cars to unsupercharged engines of no greater than 2.5-litre capacity, running on commercial fuel. AF1 was essentially a new name for the Australian National Formula which had been Australia’s premier racing category from 1964 to 1969. Effective 23 February 1971, AF1 was changed to a two-part formula catering for racing cars fitted with 5.0-litre production based pushrodV8 engines and those fitted with less restricted unsupercharged engines of eight cylinders or less and up to 2000 cc in capacity. The smaller engine option was discontinued after 1976. The main engines used were Chevrolet and Repco-Holden V8's, though occasionally a Ford V8 was seen in action without success.
In March 1979, Formula Pacific cars became eligible for Australian Formula 1 alongside the existing 5.0-litre cars and 1980 saw the addition of 3.0-litre FIAFormula One cars to the mix. For 1982, Australian Formula 1 was restricted to Formula Pacific cars only. In 1983 CAMS adopted Formula Mondial as the new Australian Formula 1 but allowed cars complying with Formula Pacific to compete alongside the new cars for that year. For 1984 CAMS changed the category name from “Australian Formula 1” to “Formula Mondial”. The Australian Drivers' Championship was open to drivers of AF1 cars throughout the life of the formula, i.e. from 1970 to 1983. During those years the term Australian Formula 1 Championship was often used in lieu of Australian Drivers Championship however the latter is used by the Confederation of Australian Motor Sport in its official records of the championship. The Australian Grand Prix was contested by AF1 cars during the years 1970 to 1983 inclusive, although the 1970 event also permitted Formula 5000 cars and the 1981race was restricted to cars complying with the Formula Pacific section of AF1.
