Australian 1½ Litre Formula
The Australian 1½ Litre Formula was a motor racing category which was current in Australia from 1964 to 1968. The formula specified racing cars 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 and above Australian Formula 2 and Australian Formula 3.
Drivers of Australian 1½ Litre Formula cars contested their own national title, the Australian 1½ Litre Championship and were also eligible to compete alongside Australian National Formula drivers in the Australian Drivers' Championship, the Australian Grand Prix 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.
