Three of these special cars were built in 1935-36 and had nothing in common with production Austin Sevens! The engine could reach 12,000 rpm, but was limited to 116 bhp at 8,590 rpm, with 7,000 for long distance events. The engine was fitted with a supercharger working at 20lb boost. Much detail was copied from the TT Vauxhall and the 8-cylinder Delage.

These Austins were the last single seater racers to be built by any major British manufacturer and followed the success of the Seven side-valve racers and of the three, two have survived.

Between 1936 and 1939 the cars had many successes including the last peace-time event, at Crystal Palace on 26th August 1939.