The Volt does not have a gas turbine engine. It uses a 1.4-liter four-cylinder gasoline engine that is connected to a generator. The generator produces electricity that is used to power the electric motor. When the battery is depleted, the gasoline engine turns on and generates electricity to power the electric motor.
The Volt can travel up to 53 miles on electricity alone. When the battery is depleted, the gasoline engine turns on and extends the car's range to over 400 miles.