In 1921 two sports versions of the successful 501, the 501S and the 501SS, were introduced. The 501S was offered with three types of coachwork – sports tourer with V-windscreen and without running boards in most cases, an open two-seater, and a sports two-seater. The 501S was offered only with sports two-seater bodywork. The engine produced almost 30 b.h.p. and its maximum speed was over 75 m.p.h. Between 1921 and 1926 Fiat produced around 2,600 sports units of the 501.
The race version, with a twin overhead camshaft 1 ½ litre engine, was also successful in competition. In 1921 it won the Parma-Poggio di Berceto event, in 1922 the Aosta-St.Bernard hillclimb, and the 13th Targa Florio.
Engine: 4 cylinders
Capacity: 1460 cc
Max. power output: 26,5 bhp at 3000 rpm
Max. speed: 100 km/h
Presented by Paolina Guidi Tangazzi, Milano