What are the differences between petrol and diesel engines?

Question

Accepted Answer

Petrol engines ignite fuel with a spark, while diesel engines use compression for ignition, leading to different performance characteristics.

Ignition Method: Petrol engines use spark plugs for ignition, while diesel engines rely on high compression to ignite the fuel-air mixture.
Fuel Type: Petrol engines run on gasoline, which is lighter and more volatile, whereas diesel engines use heavier diesel fuel.
Efficiency: Diesel engines are generally more fuel-efficient and provide more torque, making them suitable for heavy-duty vehicles like trucks.
Emissions: Petrol engines typically emit more carbon monoxide and hydrocarbons, while diesel engines produce more nitrogen oxides and particulates.
Applications: Petrol engines are commonly found in cars and motorcycles, while diesel engines are prevalent in trucks, buses, and industrial machinery.

Accepted Answer

the main different to diesel and petrol engine is that in a petrol engine fuel and air both are compressed with a spark , while in a diesel engine only air is a compressed and fuel in injected in compressed air petrol engine and diesel engines work on the Otto cycle and diesel cycle respectively

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What are the differences between petrol and diesel engines?

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