The NSU 6/30 PS was an automobile produced in 1928.

The 6/30 PS engine was tested under race conditions in the 6/60 PS compressor racing car. The vehicle proved its absolute reliability in an 18-day day-and-night test on the Nürburgring (North Circuit), where it covered 20,000 kilometres without a breakdown. The car was fitted with a 1567cc six-cylinder engine that produced 30hp at 3000rpm, this gave the car a top speed of 85 km/h.

The 6/30 PS was built on the production line of the newly built branch plant in Heilbronn. The vehicle was available as a 4-seater Phaeton, as a 6-window, 4-seater saloon and as a sports roadster with two foldaway seats.