By the time the decade of Champagne Flapper was upon us, Austin decided to focus on one model in particular - the all-new 20/4 BHP.
When the Great War ended, Austin concentrated on one model - a new 20hp. The design was influenced by Austin's own experiences of using an American 6-cylinder Hudson while the Austin factory was called to manufacture munitions instead of cars, the 20hp also featuring many new ideas derived from war time experience - an example being a central gearchange, making the driver's seat much easier to access from the off-side.The five-bearing fully pressurised engine was also of advanced design.
It was soon realised that Austin could not survive without a greater range, and by the mid-20s the Seven, Twelve, and Sixteen had been added, with the Twenty being offered in both four and six cylinder forms, with engineering to the very highest standard.
'The ''Austin Twenty'' is designed to meet the wants of the very large class of motorists who require a car of moderately high power, embodying all the refinements which modern motor engineering can provide, at a reasonable price', according to the Austin Twenty Owners' Handbook of March 1921.