The Australian 1½ Litre Formula was a motor racing category which was current in

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

from 1964 to 1968. The formula specified

racing cars Auto racing (also known as car racing, motor racing, or automobile racing) is a motorsport involving the racing of automobiles for competition. In North America, the term is commonly used to describe all forms of automobile sport including n ...

with four-cylinder unsupercharged engines using commercially available fuel and limited to 1500cc capacity. It occupied the second tier in Australian formula car racing, below the Australian National Formula (which specified a 2500cc engine capacity limit) and above

Australian Formula 2 Australian Formula 2, sometimes abbreviated to AF2 or ANF2, is a "wings and slicks" formula racing category in Australia. The category is one of Australia's oldest, dating back to 1964. The current format of AF2 was introduced in 1978. Brian Shead ...

(1100cc) and

Australian Formula 3 Australian Formula 3 has been the name applied to two distinctly different motor racing categories, separated by over twenty years. The original Australian Formula 3 was introduced in 1964 based on the FIA Formula 3 of the period and intended a ...

(1000cc). Drivers of Australian 1½ Litre Formula cars contested their own national title, the

Australian 1½ Litre Championship The Australian One and a Half Litre Championship was a CAMS sanctioned national motor racing title contested annually from 1964 to 1968. It was open to drivers of cars complying with the Australian 1½ Litre Formula which specified open wheel ra ...

and were also eligible to compete alongside Australian National Formula drivers in the

Australian Drivers' Championship The Australian Drivers' Championship is a motor racing championship contested annually since 1957 by drivers of cars complying with Australia's premier open-wheeler racing category. This category was determined by the Confederation of Australia ...

, the

Australian Grand Prix The Australian Grand Prix is an annual Formula One motor racing event, taking place in Melbourne, Victoria. The event is contracted to be held at least until 2035. One of the oldest surviving motorsport competitions held in Australia, the Gran ...

and the Tasman Cup Series. The Australian 1½ Litre Formula was discontinued as at the end of 1968 and the engine capacity limit for Australian Formula 2 was raised from 1100cc to 1600cc for 1969.The Macquarie Dictionary of Motoring, 1986, page 172

References

{{DEFAULTSORT:Australian 1 Litre Formula Formula racing Motorsport categories in Australia