What is the efficiency of a gasoline engine?

[ONorah]

The efficiency of a gasoline engine is approximately between 80%-90%. Different injection methods: Generally, gasoline engines (except for direct injection engines) mix gasoline with fuel before entering the cylinder. In contrast, diesel engines directly inject diesel into the cylinder already filled with compressed air. Different ignition methods: Diesel engines ignite through compression auto-ignition, while gasoline engines require spark plugs to ignite the air-fuel mixture. Different compression ratios: Diesel engines typically have higher compression ratios than gasoline engines, resulting in higher expansion ratios and thermal efficiency, as well as lower fuel consumption compared to gasoline engines. Gasoline engines with equivalent power are lighter and cheaper than diesel engines, but their maintenance costs are higher than those of diesel engines.