Looks like a Fiat 500. This is an Abarth 595 SS. From the little Fiat, Abarth kept the appearance but at the rear, the engine no longer displayed 500 cc, but 595 cc, and the power was increased from 22 to 32 hp. Since it weighed only 495 kg/1,090 lbs, it was clearly the ancestor of the modern GTIs.