The GAD 500 was a Polish prototype car designed and built in 1953 at the Experimental Workshop of the Polish Motoring Association (PZM) in Warsaw by engineer Stefan Gajęcki, a designer of engines and racing boats. The car itself was never given its own name; it became known instead by the designation of its engine, GAD, a name Gajęcki formed from the first two letters of his own surname together…
