The Austin A40 Somerset is a motor car which was produced by the Austin Motor Company from 1952 until 1954. The Somerset replaced the Austin A40 Devon and, as a body-on-frame car, it was comparable in size to its predecessor. It shared a number of components with the Devon which included a similar 1.2 litre straight-4 pushrod engine. The Somerset's engine was updated to produce 42 hp (31 kW), compared to the Devon's 40 hp (30 kW), giving the car a top speed of 70 mph (110 km/h).

The Austin Motor Company Limited was an English manufacturer of motor vehicles, founded in 1905 by Herbert Austin in Longbridge. In 1952 it was merged with Morris Motors Limited in the new holding company British Motor Corporation (BMC) Limited, keeping its separate identity. The marque Austin was used until 1987 by BMC's successors British Leyland and Rover Group. The trademark is currently owned by the Chinese firm SAIC Motor, after being transferred from bankrupt subsidiary Nanjing Automotive which had acquired it with MG Rover Group in July 2005.