Car Lust Classic: 1963 Chrysler Turbine
As odd as it may sound, the Chrysler Turbine was not just a concept car but a limited-production model; 50 were actually produced and placed with Chrysler customers for real-world testing. Consequently, this was closer to actual production than your average concept car.
The idea of using a turbine engine in automobiles has been around for a while and the concept continues to be batted around and appears every few years in popular technology magazines. A turbine engine works by first compressing air, heating it up either directly or indirectly by burning fuel, and using the expanding air in a turbine which results in work which is used to both further compress incoming air and also provide either rotational energy or thrust, depending on the application. Regular aircraft engines are too large and emit too much heat to simply be placed in a car, so Chrysler's research focused on reducing the size of the engine and developing a regenerator to recycle hot exhaust gas back into the combustion chamber--thus increasing gas mileage and reducing the output temperature of the exhaust gases.