What are the differences between diesel and petrol engines?

Question

Accepted Answer

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

Diesel engines use compression ignition, while petrol engines use spark ignition.
Diesel engines are more fuel efficient than petrol engines.
Petrol engines are generally quieter than diesel engines.
Diesel engines produce more torque at lower RPMs compared to petrol engines.
Examples: Diesel engine - Cummins ISX, Petrol engine - Ford EcoBoost.

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 diesel and petrol engines?

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