Difference between petrol engine 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.
Petrol engines are typically quieter and smoother than diesel engines.
Diesel engines produce more torque than petrol engines, making them better suited for heavy-duty applications like towing or hauling.
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 some cars.
Petrol engines require a spark plug and ignition system, while diesel engines require a fuel injection system and glow plugs for cold starting.

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