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A petrol engine revs higher, which allows it to burn more fuel and output more power.

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15y ago

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Why is petrol engine RPM is greater than diesel engine?

for same power diesel engine produces more torque @ less rpm whereas petrol engine produces less torque @more rpm this difference is due to different combustion processes of diesel and petrol


Which is more efficient a petrol engine or a diesel engine?

It will depend upon the conditions. Under normal operating conditions a diesel engine is more efficient than a petrol engine.


Is there more power in petrol engine than diesel engine?

There is more energy in one gallon of diesel than one gallon of gasoline. To elaborate, the word "petrol" is defined in different ways in different places..... but if you have two internal combustion engines of the same displacement the diesel will produce more power than the gasoline engine, especially in 'torque' measurement


Why diesel engine has more efficiency than petrol engine?

Diesel is a more combustible fuel than petrol, therefore less fuel is required to generate the same power as petrol. This also means that spark plugs aren't required, like in a petrol engine, since the diesel will ignite off engine compression alone. This also makes the engine arguably more reliable since there are less parts, and less things to go wrong.


Why diesel engine generates more power than a petrol engine?

Higher compression ratio, therefore it develops far more torque which equates to pulling power.


Why diesel gives more milage than petrol and petrol car costly than diesel?

Diesel engines are more efficient and do use less fuel, but they do not cost less than a petrol engine, they cost more. Diesel fuel also costs more. A diesel engine will however last longer.


What is the difference in bhp between petrol and diesel engines?

Both our internal combustion engines but the main difference is that a petrol engine uses spark plugs to ignite the fuel but a diesel engine has no spark plugs but instead uses compression to ignite the fuel. A diesel engine is also built much stronger than a gasoline/petrol engine. Diesel engines get better fuel mileage, last longer, and have much more torque or pulling power than a petrol engine. The only disadvantage to a diesel is the fact that it is more costly to build than a gasoline engine.


Is the petrol engine is costly thab diesel engine?

No, diesel engines cost more to build than petrol engines. They are built much heavier.


Why a turbocharger is not used in a petrol engine?

They certainly are. Using them together with carburetted engines can be a bit tricky, and usually the compression has to be lowered when compared to a naturally aspirated engine.


Is the volumemetric efficiency of diesel engine more than a petrol engine?

Yes


What is better a diesel or petrol engine?

It's more a question of "different", than "better". Petrol engines can have better power-to-weight ratios, while diesels are a little more efficient.


Can you jump start a flat battery on a diesel car from a petrol car?

The diesel battery is bigger as it take a lot more to get a diesel engine going. Best bet is to charge the diesel battery using the petrol, connect the 2 and leave the petrol engine running.