The Austin Twenty was a series of full size cars introduced in 1919. Over the course of its production, the Twenty was offered in a range of body styles including saloon, tourer, coupe, and limousine. Initially, the Austin Twenty was powered by a 3.6L inline four engine, but in 1928, a new 3.4L inline six became available. This lead to the inline four version being known as the 20/4 and the six cylinder as the 20/6. Both variants were built simultaneously until the 20/4 was discontinued in 1930. The 20/6 version, which featured "Austin Six" on its front grill, was built until 1938, when the model was discontinued.