7. 1963 Chrysler Turbine Car

The 1963 Chrysler Turbine Car was pure experimentation on wheels. Powered by a jet-inspired turbine engine, it could run on anything from diesel to tequila, making it one of the most versatile—and unusual—engines ever installed in a car.
Only 55 prototypes were built, each wrapped in spaceship-like sheet metal and emitting an unforgettable whirring sound. The Turbine Car’s bold design and futuristic technology made it a standout oddity in automotive history.
Source: Smithsonian Magazine