The trapezoidal shape, which was considered modern at the time, with its decorative strip running around the waist (see also BMW 1500), suits the NSU Prinz very well. Because it tries desperately to get rid of the image as a small car. And so at least a reasonably large luggage compartment at the front is possible.

Because space behind the rear seat bench as in the VW Beetle does not remain with a length of just under 3.5 m. Technically, however, it is far superior to the VW. Although the engine has only two pistons, which also always carry out the same movement, but it still has an overhead camshaft with significantly more rotary capacity.

This results in far more effectiveness in terms of performance and consumption. The much more modern design is also noticeable on the chassis. Double wishbones and rack and pinion steering at the front, something like semi-trailing arms at the rear, albeit with dry joints on the outside that work to a limited extent.

But the Prinz 4 was still considered a small car, although it was significantly larger than its predecessor. It gradually lost its acceptance in Germany, e.g. also compared to the VW Beetle. However, it is typical that it gained this in Italy, where about a quarter of the production was delivered in recent years.