The SS 90 is a British sports car that was built by SS Cars in Coventry, England, in 1935. In 1945, the company changed its name to Jaguar.
The car has a six-cylinder side-valve Standard engine of 2,663 cc with an output of 50 kW. The engine differs from that used in the ordinary cars by having Dural connecting rods, an aluminium cylinder head with 7:1 compression ratio, and twin RAG carburettors. The chassis is 2,642 mm long; a shortened version of the one used on the SS 1, and was also supplied by Standard. Suspension is by half-elliptical springs all round, with an underslung back axle. The braking system is Bendix.
The model rapidly gained attention for its elegant sporting styling, but was not well regarded by the sporting fraternity as its performance did not match its appearance. True sports car performance came with the SS Jaguar 100, which had similar styling and suspension but an engine with an overhead-valve cylinder head.
The SS 90 does not seem to have been tested independently by any magazines, so contemporary performance figures are unknown. However, it was widely believed to be capable of reaching 150 km/h.
The factory originally fitted 139.7 × 457.2 Dunlop