The Austin 20 hp was produced between 1915 and 1931.

The cars had a 3601cc side-valve four-cylinder engine that produced 55bhp (40 kW).

Only during 1915 was the Austin Sports 20 hp 2-seater roadster produced. In 1916, the Austin 20 hp four-seat torpedo appeared, which reached a top speed of 93 km/h.

The Austin 20 hp Raleigh limousine, a 4-seater Pullman limousine was produced from 1929 onwards. It had an engine that developed 45bhp (33 kW) and was able to reach a top speed of 101 km/h.