At the beginning of the 1960s, rear engines and air cooling were still considered progressive, and the Chevrolet Corvair or the VW Beetle were regarded as modern and contemporary vehicles. So it is hardly surprising that NSU also used this design for the NSU Prinz 4, aiming for low weight and good space economy. With the TT, the Prinz was joined by a sporty brother that caused a sensation in racing and on the road until the 1970s (and beyond).