7. NSU Ro80
The NSU Ro80, introduced in 1967, was a German sedan that showcased advanced aerodynamics and featured the innovative Wankel rotary engine. Despite its technological advancements, the Ro80 faced challenges such as high pricing and reliability issues with the rotary engine, leading to NSU’s bankruptcy. Nevertheless, the Ro80’s design and engineering have influenced subsequent European sedans, leaving a lasting legacy in automotive design. (en.wikipedia.org)