Top Four-wheel Drive Refers to the number of wheels to which the engine's power is distributed. The fuel-injection system, like the carburetor prepares the correct mixture of air and fuel for the engine. The system receives fuel from the fuel-tank through a mechanical pump. This fuel is received under relatively low pressure, and is injected into the engine under higher pressure, at a precise, pre-determined time. A multiple-point fuel injection system means each cylinder of the engine has a separate electronically controlled fuel injector.
Transmission is done through a pair or even three gear wheels.
The increased air pressure allows more fuel to be burned and results in increased horsepower being produced. A turbo-charged engine consumes slightly more fuel, but gives greater power to the car. This indicates the total volume of all the cylinders put together in an engine. A horse power is the power of one horse, or a measure of rate at which a horse can work. A 10 hp engine for example do the work of 10 horses.