9. Chrysler Turbine Car
The 1963 Chrysler Turbine Car featured a gas turbine engine capable of running on various fuels, including kerosene and diesel, offering versatility and reduced maintenance. However, the engine’s high idle speed of 22,500 rpm led to poor fuel efficiency, averaging around 11 miles per gallon. Additionally, the turbine’s throttle lag and high exhaust temperatures posed challenges for everyday driving, making mass production impractical. (smithsonianmag.com)