Australian Formula 1

Australian Formula 1 (AF1) 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 non-supercharged engines of no greater than 2.5-litre capacity, running on commercial fuel.

[1] AF1 was essentially a new name for the Australian National Formula which had been Australia’s premier racing category from 1964[2] to 1969.

[3] Effective 23 February 1971, AF1 was changed to a two-part formula catering for racing cars fitted with 5.0-litre production based pushrod V8 engines (internationally known as Formula 5000 cars) and those fitted with less-restricted non-supercharged engines of eight or fewer cylinders and no more than 2-litre capacity.

[5][6] The main engines used were Chevrolet and Repco-Holden V8s, though occasionally a Ford V8 was seen in action without success.