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Most likely because they would be able to pull more and have more torque. This makes is so that is needs a bigger engine so that there is more power to pull the object a certain distance.

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Related Questions

Is the petrol engine is costly thab diesel engine?

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


Is petrol heavier than diesel?

No, diesel is heavier.


What is the difference between petrol and diesel engines?

diesel engines doesn't use spark plug but uses heater plug.petrol engines produces more torque than petrol engines but petrol engines produces more acceleration than diesel engines.petrol engine is faster to be heated than diesel engine.


Which is more powerful petrol or diesel engine?

Normally Diesel engines produce more torque than gasoline engines but less horsepower. Gasoline engines rev up quicker and produce higher horsepower at higher rpms. Diesel engines develop their higher torque at lower rpms which allows a diesel to carry a heavier load.


Which gives more mileage petrol or diesel?

Diesel engines normally get better fuel economy than gasoline engines.


Has diesel got more fuel energy than petrol?

Actually diesel fuel has a slightly lower amount of energy per weight than gasoline (45.3 vs. 47.2 MJ/kg). Cylinder pressure is what gives diesel engines their power, that is why diesel engines parts are so much stronger/heavier than gas similar sized gas engines.


What are the defferences between dessel and petrol engine?

Petrol & Gas engines are spark ignited engines where as diesel engines are compression ignited engines. Petrol engines works with explosion of fuel air mixture due to spark from spark plug inside the cylinder. Diesel engines works with combustion of fuel air mixture due to compression, compressed mixture attains a very high temperature which exceeds the flash point of diesel and starts burning inside the cylinder and the hot gases after burning of fuel misture exerts force on piston which makes the diesel engines work. Diesel engines are highly efficient than petrol engines.


Why petrol engines are faster than diesel engines?

Petrol engines are widely considered to be the most efficient of engines, because they are more refined than diesel. Since diesel is not completely refined, it cannot completely combust and so does not (in theory) produce as much energy per litre of fuel as a petrol engine. However, some diesel engines can be made to be much more efficient than petrol engines because they have a different type of fuel, and burn it in a different way. Petrol engines are widely considered to be the most efficient of engines, because they are more refined than diesel. Since diesel is not completely refined, it cannot completely combust and so does not (in theory) produce as much energy per litre of fuel as a petrol engine. However, some diesel engines can be made to be much more efficient than petrol engines because they have a different type of fuel, and burn it in a different way.


Differences between petrol and diesel engines?

sic difference between Petrol and Diesel engines that the difference of fuel and their mixture..in diesel we only compresses the Air and sprays Diesel but in Petrol Engines we compresses both the air and Petrol together and gets burnt with the the help of spark given by the Spark plug. I must add this, also the thermodynamic cycle is so different in diesel engines rather than petroleum engines. You can fined more in Reed's series volume 12


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.


Why otto cycle used for petrol engine and diesel cycle for diesel engine?

A standard 20 to 1 otto cycle is used for the petrol and diesel cycles for diesel engines. It is higher than gasoline engines due to the way diesels burn and compress fuel.


Why diesel engine is costlier than petrol engine?

Overall each piece is bigger and heavier.