4. Ford GT90 (1995)
When Ford unveiled the GT90 at the 1995 Detroit Auto Show, it presented a striking vision of automotive performance and design innovation. This mid-engine supercar concept featured a futuristic, angular body and advanced construction techniques, including extensive use of aluminum and carbon fiber. At its heart was an extraordinary 6.0-liter quad-turbocharged V12 engine, delivering an astonishing 720 horsepower and a potential top speed exceeding 250 mph. Though it never reached production, the GT90 strongly influenced subsequent supercar designs, notably inspiring Ford’s later GT models. Its bold styling and ambitious engineering continue to leave enthusiasts wondering about its unrealized potential.