8. TVR Speed 12
One of the craziest and rarest supercars is the TVR Speed 12. TVR based it on the mid-90s TVR Cerbera coupe. The Speed 12 was the ultimate version of a chassis and engineering exercise to test the limits of power and speed in the production car market. Back in the day, TVR had a lot of racing experience. So, the company wanted to see what they could do if they concentrated all their resources on a superfast racing/street model. They built the Speed 12 with FIA racing propositions in mind. Soon they presented the first and only prototype. It had a 7.7-liter V12 engine capable of delivering close to 1,000 HP.

The rest of the car was for pure racing with a lightweight chassis, sequential gearbox, and active aero package. The performance was terrifying. The Speed 12 could accelerate to 60 mph in less than three seconds and go well over 200 mph. Unfortunately, TVR canceled production for two reasons. First, the FIA changed the requirements for the racing class, making the Speed 12 obsolete. Second, company management was afraid the car was too fast for the street and drivers would get killed driving it.