Question

Different between diewel engine and petrol engine

Answer 1

Difference Between Petrol and Diesel Engine in Tabular Form

 

S.No

Petrol Engine

Diesel Engine

       1.

The petrol engine works on Otto cyclei.e. on constant volume.

The diesel engine works on diesel cyclei.e. on constant pressure.

         2.

The air and petrol are mixed in the carburetorbefore they enter into the cylinder.

The fuel is fed into the cylinder by a fuel injector and is mixed with air inside the cylinder.

          3.

The petrol engine compresses a mixture of air and petrol which is ignited by an electric spark.

The diesel engine compresses only a charge of air and ignition is done by the heat of compression.

          4.

Compression ratio is low.

Compression ratio is higher in diesel engine.

          5.

Less power is produced due to lower compression ratio.

Due to higher compression ratio more power is produced.

          6.

Petrol engine is fitted with a spark plug

It is fitted with a fuel injector.

          7.

Burns fuel that has high volatility.

Burns fuel that has low volatility.

      8.

They are used in light vehicles which requires less power.

Eg: car, jeep, motorcycle, scooters etc.

They are used in heavy vehicles which require high power.

Eg: bushes, trucks, locomotive etc.

         9.

Fuel consumption in petrol engine is high.

Fuel consumption in diesel engine is less.

        10.

Lighter

Heavier

       11.

Petrol engine requires frequent overhauling.

Overhauling of diesel engine is done after a long time.

      12.

Lesser starting problem.

Greater starting problem.

      13.

Lower initial cost.

Higher initial cost.

       14.

Lower maintenance cost.

Higher maintenance cost.