Chrysler Turbine concept (1963)
Of all concept cars ever made, the Turbine has to be one of the most amazing and most ambicious. And we’ve all seen some truly mad concepts before. The Turbine featured a mental engineering concept and a (rather) sleek body, provided by Ghia.
Quoting directly from Wikipedia,
“The fourth-generation Chrysler turbine engine ran at up to 44,500 revolutions per minute, according to the owner’s manual, and could use diesel fuel, unleaded gasoline, kerosene, JP-4 jet fuel, and even vegetable oil. The engine would run on virtually anything and the President of Mexico tested this theory by running one of the first cars—successfully—on tequila.”
Unfortunately, the project was later abandoned, due to being too risky. Even so, about 50 were produced, but most of them destroyed.