9. Chevrolet CERV III
As you probably know, Chevrolet has been playing with a mid-engine Corvette idea since the ‘60s. But in the early ‘90s, it looked like they would finally present a road-going full production version. Chevy presented the CERV III concept in 1990, and it was stunning. It was a proper supercar with a 225-mph top speed.
They gave it all-wheel drive and special brakes, and it delivered 650 HP, which was impressive. The prototype looked mature, so everybody expected Chevrolet would introduce the CERV III as a production model. But unfortunately, they decided not to in the end.