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.