The question you ask yourself if you are not a car fanatic is What is a hybrid car? You hear on TV but really do not know what it is. Here is the answer. A hybrid car, in the simplest terms, is one that uses two different energy sources to maximise efficiency. This usually means combining electrical energy stored in batteries, with the combustion energy of fuel such as petrol, diesel or liquid petroleum gas. It’s a bit more complicated than that, because in different hybrid systems the electrical energy may be generated on board.