Answer Posted / ravi gupta

actually per kg petrol has higher calorific value than
diesel ...so it produces greater heat energy ...the heat
produced by diesel engine goes mostly in the form of torque
due to larger
length of stoke ...whereas a petrol engine produces more rvs
than torque...therefore we usually say that a petrol engine
has higher power than diesel engine..also as losses are more
in a diesel engine like compression losses which are absent
in petrol engine..

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