	The car used a six-cylinder side-valve Standard engine of 2663 cc with an output of . The engine differed from the one used in the ordinary cars by having Dural connecting rods, an aluminium cylinder head with 7:1 compression ratio, and twin RAG carburettors. At in length the chassis was a shortened version of the one used on the SS 1, and was also supplied by Standard. Suspension was by half-elliptical springs all round, with an underslung back axle. The braking system was Bendix.