Comparison Between a Petrol Engine and A Diesel Engine:



Comparison Between a Petrol Engine and A Diesel Engine:

In this post the information is purely based on exam point of view for the students struggling for the answer for the above topic

Petrol engine:

1Air petrol mixture is sucked in the engine cylinder during suction stroke.
2Spark-plug is used.
3Power is produced by spark ignition.
4Thermal efficiency up to 25%
5Occupies less space.
6  More running cost.
7  Light in weight.
8 Fuel costlier.
9 Petrol being volatile is dangerous.
1 Pre ignition possible.
1Works on otto cycle.
1 Less dependable.
1Used in cars and motor cycles.

Diesel engine:

  Only air is sucked during suction stroke.
   Employs an injector.
3Power is produced by compression ignition.
4Thermal efficiency up to 40%.
5Occupies more space.
6Less running cost.
  Heavy in weight.
8Fuel cheaper.
9Diesel is non dangerous as it is non volatile.
1Pre ignition not possible
1Works on diesel cycle.
1More dependable.
1Used in heavy duty vehicles like trucks, buses and heavy machinery.


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