The Four-stroke-cycle spark-ignition (petrol) engine

Diesel engines have improved efficiencies, between 30% and 40%. Noise: Diesel engines are noisier. The combustion process is quieter in the petrol engine and it runs smoother than the diesel engine. Cost: Due to their heavy construction and injection equipment, diesel engines are more expensive than petrol engines. The two-stroke-cycle petrol ... ................
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