But BMW's engineers think that they can regain this lost performance by redesigning the engine to have direct fuel injection and by turbocharging it.

At Ford, with the internal-combustion engine and direct fuel injection, we're making a 25 percent improvement in miles per gallon and we're reducing CO2 [emissions] by 15 percent.

Electric fuel pump is an important part of automobile fuel feed system, which absorbs fuel from fuel tank and provide it to the air crocks of engine by fuel injection.