A car with both an electric motor and an internal combustion engine (running on
petrol, diesel or LPG).
The best-known hybrid is the Toyota Prius, which is mainly powered by a regular
petrol engine but employs supplementary electric power to improve fuel economy.
Other Toyotas (and Lexus) use a similar system.
Future hybrid systems will include the plug-in hybrid (like GM’s Volt), which
is designed to mainly run on electric power, with the batteries charged from a
socket, while an on-board engine is only used when needed as an on-board
generator to charge the batteries on the move.