18. BMW 8-Series E31
This wasn’t a replacement for the aging 6 Series coupe; this was a brand-new model conceived as the best Gran Turismo coupe in the world. The design and platform were brand new as well as the engines and 8 Series featured a V8 and brand even advanced V12 engines (via Motor1).
The car was filled with advanced technical solutions, electronic systems, top-of-the-line hardware, luxury details, and the finest leather. Even though those things were considered advantages by BMW, they turned into a nightmare since the cars were unreliable and heavy and performance wasn’t so convincing. Production lasted until 1999 and only around 30,000 were made.