1961 Rover T4 Gas Turbine

One of several gas-turbine-powered cars Rover and BRM worked on in the late 50s and early 60s, the T4 was based on a Rover P6 prototype. The engine bay of the P6 was designed to accommodate a gas turbine, but when it went on sale in 1963, it was with a conventional 4-cylinder petrol engine.

Source: carsthatnevermadeitetc