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1) Diesel contains more energy in it than Petrol
2) Diesel engines can run much leaner air fuel ratios than petrol without engine damage, due to compression ignition there are no pre-ignition problems
3) Pumping losses are much lower because the throttle is always wide open
4) Compression ratio is much higher which leads to better thermal efficiency than petrol.
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Why do many cars have diesel engines when petrol gives a better performance?
Some cars have diesel engines because diesel engines give more mileage and diesel is cheaper than gasoline in some countries. In the UK diesel fuel costs more than gas but, because diesel engines give much better mileage (miles per gallon), people are still happy to pay more for the diesel fuel if they run diesel vehicles. Diesel engines last much longer and have much better torque at low revs than a petrol engine.
What is the mileage for Ford vehicles?
Ford sedan will give 14-17kmpl for petrol and for diesel 17- 23.5kmpl SUV will gives 7 to 12 kmpl for petrol and diesel
What foods give you gas?
Petrol or Diesel
Does a gasoline or diesel car give better gas mileage?
Diesel.
What are the advantage of CNG over petrol and diesel engine?
CNG engines create less polution than petrol and diesel engines.As it is using compress natural gas power develops more than the others and also develops more torque in the engine.which leads to give a lower fuel consumption.
Which is the engine that gives max mileage either diesel or petrol engine?
Diesel will always give you better fuel mileage as diesel fuel itself contains more BTU (the measure of thermal energy) in a given quantity than compared to gas.So therefore a diesel engine can extract more mileage out of a gallon of diesel fuel as there is more energy to extract out of that gallon as compared to a gallon of gas.Considering this, this is why diesel fuel prices would have to rise considerably over gas before the two would be equal on a cost per mile basis.
What is the best option Maruti Swift Diesel or i20 diesel or toyoto etios liva diesel?
swift diesel give good mileage
Do petrol have more calorific value than diesel?
Diesel has a calorific value about 5% higher than regular gas, but about the same as higher octane products. Therefore it should give slightly better mileage. and should cost about 12 cents a gallon more. As diesel was regarded for decades as a sort of by-product of the distillation process, it was able to be sold cheaper until recently when the price is nearer its true value. Diesel gets more m.p.g because of its higher calorific value, but, in order to get it to burn, it has to have a higher compression engines which are more sturdily built and permanently more expensive. If one built petrol engines with compression ratios of 11:1, they too would be more efficient in producing power (as are racing and airplane engines) but they pollute more and would also be more expensive. If you try to convert a gas engine to use diesel you will get an engine that breaks prematurely.
Why desiel engines will give more milage when compared to petrol enginess?
They are simply built much tougher. Diesel engine have a compression ratio that is much higher than any petrol engine. As such the internal parts must be built stronger to handle the higher compression. Also the diesel fuel itself provides some lubrication. These factors provide for a much longer life.
How do you distinguish between a petrol engine and diesel engine?
A diesel engine is an internal combustion engine which uses the heat of compression to ignite the fuel/air mixture in the third stroke of the 4-stroke cycle, while the petrol engine is an internal combustion engine which uses an electrically-generated spark system to do the ignition. Diesel engines have a higher efficiency compared to petrol engines. In simple terms this means diesel engines can give 50% or more miles per gallon than petrol engines.
How do petrol and diesel engines work?
No. Diesel and petrol, while both petrochemicals, act quite differently. Petrol is ignited by a spark, and at a relatively low pressure. Diesel 'self ignites' when placed under sufficient pressure, therefore diesel engines do not use spark plugs, and require higher operating pressures to work. To allow for the different pressures, there are large differences between the designs of petrol and diesel engines, carburettors/fuel injectors and valve systems. The only way to convert a petrol car to a diesel (or vice versa) is a complete engine swap.
What is the minimum compression ratio for diesel engines?
Around 18:1 will give a running diesel on a engine such as an old perkins 4203
