The British Salmson 20/90 (Or S6D) was a car made between 1936 and 1939. It had no French equivalent.
The engine was a six-cylinder unit of 2580cc, still with twin overhead camshafts and the car was available as either Sports Saloon, two-seater sports or drophead coupé.
A maximum speed of nearly 90mph (140 km/h) was claimed.
Bendix cable brakes were fitted to the first few cars but later ones had Lockheed hydraulics. About 15 were made up to the outbreak of war.