A »Diesel engines differ from gasoline engines primarily in their compression and ignition processes. Diesel engines have a higher compression ratio, which causes the air to heat up enough to ignite the diesel fuel injected into the cylinder, eliminating the need for spark plugs. Gasoline engines, in contrast, use spark plugs to ignite the air-fuel mixture at a lower compression ratio. This fundamental difference contributes to diesel engines' efficiency and torque advantages.

A »Diesel engines differ from gasoline engines in that they use compression ignition, where fuel is injected into highly compressed air, igniting without a spark. Gasoline engines use spark ignition, relying on a spark plug to ignite a mixture of air and fuel. This fundamental difference affects engine design, efficiency, and performance.