The NSU Prinz IV replaced the original Prinz (I to III)
in 1961. The Prinz was considerably shorter than the NSU
1000, particularly in the rear, with the engine compartment
encroaching on the rear seating area.
Like its predecessor, the Prinz IV was powered by a 2-cylinder,
air-cooled engine, the drive train and, some thought styling,
very similar to the Chevy Corsair.
When NSU was acquired by Volkswagen, the name was changed
to Audi-NSU AG, and the small, rear-engined models were
quickly phased out, as they were too competitive against
Volkswagen's own Beetle!
In 1967, Soviet manufacturer ZAZ created a virtual copy
of the NSU Prinz, named ZAZ-966.
However, the engine an
air-cooled V4 with 900 cc and 30 hp (1200 cc and 39 hp
in later years), totally different from the NSU's unit.