Abstract: A turbine drive system for operating a vehicle, where the drive system includes a common drive shaft powered by a turbine, and is used for propelling the vehicle and also for operating an air compressor. The air compressor supplies air under pressure which is stored in a pressure tank. The pressurized air operates the turbine which has a vane rotor. A return air flow path is provided from the turbine back to the compressor. By use of a vehicle fan, an air intake is provided to the compressor during forward movement of the vehicle. An auxiliary engine can be included for starting the compressor where the auxiliary engine can also be utilized as an auxiliary drive for the compressor. Additionally, a conventional vehicle engine can be included which operates the same drive shaft and which can work in conjunction with the turbine drive system.