Difference between diesel and petrol engine

Question

Accepted Answer

Diesel engines use compression ignition while petrol engines use spark ignition.

Diesel engines use compression ignition, where the fuel-air mixture is ignited by the heat of high compression, while petrol engines use spark ignition, where a spark plug ignites the fuel-air mixture.
Diesel engines are more fuel efficient than petrol engines due to higher compression ratios and slower combustion process.
Petrol engines generally have higher power output and acceleration compared to diesel engines.
Diesel engines are more durable and have longer lifespan compared to petrol engines.
Diesel engines produce more torque at lower RPMs, making them suitable for heavy-duty applications like trucks and buses, while petrol engines are more commonly used in cars and motorcycles.

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