Asked by: John Awbery, Reading
About 90 per cent of the power that goes into an electric motor is converted into torque to turn the car's wheels. In a petrol car, the efficiency is only about 25 per cent. And, unlike electric cars, petrol motors continue using up energy even when idling. However, when you take into account energy costs in generating the power used to charge an electric vehicle's batteries, the efficiency is pretty much the same as in petrol cars.
- Will electric cars reduce pollution?
- At what speed do hybrid cars switch from battery power to petrol power?