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Difference between petrol engine and diesel engine

Difference between petrol engine and diesel engine:



In this article we will discuss about the difference between petrol engine and diesel engine. The detailed explanation about petrol engine and diesel engine is as follows.

Petrol engine:

  • Petrol engine is a internal combustion engine.
  • Petrol engine ignites the fuel with the help of a spark plug.
  • It has less compression ratio than a diesel engine.
  • Torque produced at lower speeds is less than diesel engines.
  • In these engines, there is a chance for pre-ignition.
  • Due to less torque produces at low gears these engines are not useful to carry heavy loads.
  • Overall power developed is less.
  • This engines has higher acceleration.
  • Maintenance of petrol engine vehicles is lower than diesel engines.
  • There is a chance in damaging of the lubrication system.
  • Engine temperature increases to high temperature than diesel engines.
  • This engines produce less noise.
  • The efficiency of the fuel is less comparatively.
  • Life of petrol engine is less than diesel.
  • Manufacturing of petrol engine is complex due to an additional spark plug is required.
  • This type of engine has less weight than diesel.
  • Vibrations developed is less in these engines.
  • Petrol engine gives less millage.


Diesel Engine:

  • Diesel engine is also an internal combustion engine.
  • Diesel engine ignites the fuel with high compression only.
  • It has a high compression ratio than a petrol engine.
  • It develops high torque at lower speeds.
  • In this type of engines, there is no chance for pre-ignition.
  • Diesel engines are mostly used for carrying heavy loads due to high torque produced.
  • Overall power developed is high.
  • This type of engine has a lower acceleration.
  • Maintenance of diesel engines is more than petrol engine.
  • There is no chance in damaging of the lubrication system.
  • Diesel Engine temperature is maintained low than petrol engines.
  • This engines develops more noise.
  • Efficiency of fuel is more.
  • Diesel engine has longer life than petrol engine.
  • Manufacturing of diesel engines is not as complex as petrol but they should be stronger than petrol engines.
  • Due to the diesel engines are strongly built they have more weight.
  • Vibrations developed is more due to high compression.
  • Millage given by this type of engines is more.


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