14. NSU Ro 80
The NSU Ro 80 stunned the automotive world in 1967 with its daring wedge-shaped design and revolutionary rotary (Wankel) engine. Its aerodynamic styling and advanced engineering set new benchmarks for comfort and innovation in executive sedans.
Unfortunately, the rotary engine’s reliability issues—particularly with rotor tip wear—led to frequent breakdowns and costly repairs. Despite its technological brilliance, these setbacks ultimately doomed the Ro 80 and its ambitious maker. The car’s legacy, however, remains influential. Classic & Sports Car