Pros and Cons – diesel engine vs. petrol engine

An engine is an apparatus or a machine responsible for the conversion of one form of energy into mechanical energy. In layman’s language, the engine burns the fuel (petrol or diesel) to create heat and further which is used to create force. Nowadays, one has the option to buy hi-tech vehicles with latest technologies and benefits. Despite such technological advancements, the heart of the vehicle will be always a diesel engine and petrol engine.


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People chose the engine with respect to their requirement of power, torque and mileage. Even the prices of these petrol and diesel engine based cars have a lot of difference in them. But this has never been the concern for the car lovers. Cars may look the same but it’s the engine which defines its power. Let’s discuss certain pros and cons of diesel and petrol engines which can ease you with your car purchase.

Financial factors:

Diesel engines: These engines are more efficient and use 15-20% less fuel. But these engines are costlier and demand high maintenance. Even they have less resale value comparative to petrol engines.

Petrol engines: These engines are less expensive and need less maintenance. But they consume more fuel and are costlier while choosing for regular use. They have high resale value than diesel engines.

Also Read: Toyota create ‘free piston’ engine with no crankshaft and electrical output

Environmental factors-

Diesel Engine: With these engines, there are lower CO2 emissions and the owners have to pay more taxes. But the diesel engines tend to release tiny particles which can cause asthmatic problems to masses.

Petrol engines: These engines emit more CO2 in comparison to the diesel engines and they have to pay fewer taxes than diesel engines.

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