Why do Diesel engines have that distinctive sound to them when compared to gasoline engines?
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Diesels create combustion by compressing fuel rather than using spark plugs like in a petrol car.
It’s why diesels sound like a wooshy-thump, compared to petrol which sounds more like thousands of tiny little explosions in short sequence.
Extra:
Diesel-type fuels are non-flammable at ambient pressures, but become incredibly volatile at extreme pressures inside a combustion chamber. The engines need to be built stronger with heavier materials, this makes them more sluggish in power delivery and consequently in noise as well.
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