SS 90 appeared in March. It is a 90-mph two-seater sports car powered by a 2663.7-cc (73x106 mm) six-cylinder side-valve engine from the SS I on the chassis of the SS II. Power output is 68 bhp at 3600 rpm. At the rear there is a slab-mounted fuel tank and a vertically mounted spare wheel.
SS I is available with 53-bhp 2143-cc (65.5x106 mm) 15.96 HP engine or with 68-bhp 2663.7-cc (73x106 mm) 19.84 HP variant. Both are side-valve six-cylinders. Wheelbase is 9 ft 11 in for both types. Saloon and Tourer bodystyles are available on the same chassis, as well as 8 ft 8 in wheelbase four-cylinder 10 and 12 HP SS II variants.