The Jaguar Mark IV (pronounced mark four) is a saloon car built by Jaguar from 1945 to 1949. It was a relaunch of a pre-Second World War model made by SS Cars Ltd from 1936. Before the Second World War the name Jaguar was the model name given to the complete range of cars built by SS Cars Ltd. The saloons were titled SS Jaguar 1½ litre, 2½ litre or 3½ litre. The two-seater sports car was titled the SS Jaguar 100 2½ litre or 3½ litre. All the cars were built on a separate chassis frame with suspension by semi-elliptic leaf springs front and rear. __TOC__