The 501 was the popular post-war car par excellence. In fact, undoubtedly, it was one of those that formed the backbone of Italian motoring for almost a decade. In 1922, the 501 model was followed by the sporty 501 S and 501 SS models. As compared to the basic version with a 23 HP engine, the 501 S version had an upgraded engine with 26.5 HP, a more compressed engine, a different camshaft, longer axle ratios, and a higher speed. It was followed by many other versions built by skilled and attentive bodywork mechanics, who recognized the 501 S as a car that was able to combine sporty characteristics with low costs