A hybrid electric vehicle or HEV is a type of electric vehicle that combines the advantages of both electric motors and gasoline engines. That is, the HEV has an electric motor as well as an internal combustion engine that runs on petrol or diesel. There are different types of HEVs based on the arrangement and working of the two motors. Modern HEVs are adopting newer technologies like regenerative braking; automatic shutdown and electric motor assist which greatly improve a car’s efficiency.

The biggest benefit offered by a HEV is higher fuel efficiency, almost twice as that of a conventional vehicle. Since these vehicles entail lower petrol consumption and reduced noise pollution, they are believed to have a positive impact on the environment. The benefits do not come cheap and HEVs are expensive as compared to their conventional counterparts. However, with advances in manufacturing technologies the price gap is expected to shrink over time.