16: 1982-1988 Ford EXP
The Ford EXP was an experimental project that was supposed to be the next popular sports car in Ford’s portfolio. The problem with the EXP was that it was based on the Escort and that didn’t mesh with what consumers were looking for. The EXP was an underpowered car and the reliability and build quality of the Escort around this time were questionable at best. The lack of reliability was the main issue that caused sales of the EXP to never reach their full potential (via The Motor Digest).
A compact sports car like this could have been popular, such as the Toyota Celica. However, with the issues the car faced from the gate, there was never a way for the company to recover the sales. The Ford Probe sort of took the place of the EXP later on, but it was also a sales flop.