Page "Internal combustion engine" Paragraph 145

Diesel engines are generally heavier, noisier, and more powerful at lower speeds than gasoline engines.

They are also more fuel-efficient in most circumstances and are used in heavy road vehicles, some automobiles ( increasingly so for their increased fuel efficiency over gasoline engines ), ships, railway locomotives, and light aircraft.

Gasoline engines are used in most other road vehicles including most cars, motorcycles, and mopeds.

Note that in Europe, sophisticated diesel-engined cars have taken over about 40 % of the market since the 1990s.

There are also engines that run on hydrogen, methanol, ethanol, liquefied petroleum gas ( LPG ), biodiesel, wood gas, & charcoal gas.

Paraffin and tractor vaporizing oil ( TVO ) engines are no longer seen.