Difference between petrol and diesel engine

Question

Accepted Answer

Petrol engines use spark ignition while diesel engines use compression ignition.

Petrol engines use a spark plug to ignite the fuel-air mixture while diesel engines compress the air to a high temperature and pressure to ignite the fuel.
Petrol engines are generally more fuel efficient at high speeds while diesel engines are more fuel efficient at low speeds.
Diesel engines produce more torque than petrol engines, making them better suited for heavy-duty applications like towing.
Petrol engines are generally quieter and smoother than diesel engines.
Petrol engines emit more CO2 and other pollutants than diesel engines.
Examples of petrol engines include those found in most cars and motorcycles, while diesel engines are commonly used in trucks, buses, and heavy machinery.

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