What is difference between petrol engine & diesel engine.

Question

Accepted Answer

Petrol engines use spark ignition while diesel engines use compression ignition.

Petrol engines use spark plugs to ignite the fuel-air mixture, while diesel engines rely on compression to ignite the fuel.
Petrol engines typically have higher RPM (revolutions per minute) compared to diesel engines.
Diesel engines are more fuel-efficient than petrol engines.
Petrol engines are generally lighter and more compact than diesel engines.
Petrol engines are commonly used in cars, motorcycles, and small vehicles, while diesel engines are often found in trucks, buses, and heavy machinery.

Accepted Answer

petrol engine :

1) produce light smoke

2) it's required spark plug

3) it work on Otto cycle

4) lower engine efficiency

5) lower engine vibration and noise

Diesel engine:

1) produce lot of smoke

2)it reguired fuel injector

3)it work on diesel cycle

4) higher engine efficiency

5)higher engine vibration and noise

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