Most of us usually wonder what is the difference between a petrol and a diesel car and whyon earth do we usually have both kinds of engines running on road vehicles.
Other than the smoothness noticed in a petrol engine , the basic facts that differentiates a petrol and a diesel car are as follows
->Petrol Engines fire with the help of a spark plug (produces a spark to ignite petrol) while Diesel engines do not need a spark plug to ignite. Diesel engines have a self ignition property. As the air compresses inside, the diesel which is injected gets burnt due to the high compression and temperature. So the next time you see a spark plug ad from MICO, remember that these are only used for petrol engines.
->Petrol Engines are less fuel efficient than Diesel Engines as a matter of fact. Although we find that a Maruti 800 has a very high fuel efficiency of around 17-20kmpl,in reality Diesel produces more energy per given unit of fuel .This means Diesel engines are more efficient than petrol Engines for a given power rating. That’s one reason why Diesel is the most common fuel used for higher rated engines, such as trucks and buses. Diesel‘s thermal efficiency makes it better suited for heavier vehicles than petrol.
-> Another important point of difference between the Diesel and petrol Engines is their reaction to the accelerator pedal. While modern petrol engines usually inject fuel proportional to the accelerator pedal. That means, the more you accelerate, the throttle directly releases more percentage of petrol and air to burn for the power. While in Modern Diesel engine, the accelerator pedal and other pressure conditions are also taken into picture to release the diesel for burning. This is one main reason why we see that petrol cars virtually listen to your accelerator demand , while Diesel cars (without a turbo) do have a slight lag. However, with the improved Common rail diesel Engine and turbo chargers, Diesel cars are almost neck to neck with the petrol cars.
-> Diesel cars have a higher torque (turning power) when compared to petrol cars. So when you are driving uphill on a lower gear, you might be surprised that a Diesel car will take lesser effort to drive up because of the Diesel’s higher thermal efficiency and higher generation of torque. That’s another reason why heavy vehicles tend towards Diesel engines because they need higher torque to even get the vehicle moving.
While it is a personal choice to buy a petrol or a diesel car, one needs to remember that Diesel engines are also built to last longer.
click here to decide whether to buy a diesel or a petrol car
Diesel engines are has more horse power than petrol engine vehicles, diesel vehicles is ignition by compression and petrol by spark. As comfort is concerned, for smooth and less noisy drive, petrol cars are always in demand.
If diesel has more power than petrol then in airplane why we use petrol?
Hi Paresh.
Petrol Engines and Diesel engines for automobiles are Internal combustion engines , but the aeroplane engines are not exactly the same as automobile engines although they use fossil fuels . The commercial planes in fact use a special derivative of fossil fuel known as White kerosene, and it is not exactly same as the petrol that is sold in the petrol bunks on the roads. Hence The Jet fuel / aeroplane fuel will have additional characteristics/functions other than just generating more power.. In fact it is of a higher quality as well, which will definitely generate more power as well. some kind of aeroplanes also use Diesel but are rare.
You will get more info about Jet fuels, aeroplane fuels on “how stuff works ” website.
Hope that Autoraiders could help you in clearing some of your doubts,
Thank you for visiting autoraiders ..
Regards,
Chief Admin, Autoraiders.
please could you give which one is the best, petrol vehicle or diesel vehicle on request
thankingyou
please do provide pictures of both the engines and publish how the difference could be understood just by visual inspection.
if we compare between the both a diesel n a petrol cars then mostly the point favour the diesel cars n shows that better although too then there is demand of petrol cars mostly why,
we read the term in hybrid cars “regenerative braking” what is that
Hi Chintan ,
Thanks For your comments. A diesel or a gasolin/petrol car will almost look the same from outside.
One can recognise a Diesel car as it ll be noisier than Petrol .. Petrol cars, engines are much silent,
It will be hard to recognise the differences when you see the actual engine because they come in a huge pre cast casings. Open the Bonnet and you can see the engines.
There are different parts of the engine which will actually differentiate between Petrol and Diesel.
You will need to check on other technical sites such as how stuff works.com , dieselnet.com etc to get into the details of the engine..
Thanks ,
Best Regards,
Autoraiders Admin
Whether to go with petrol car or diesel car? I am basically a hill rider.
I am buying a car this monday.Pls do tell me which car should i buy in hatchback for diesel.
if diesel has more power than petrol,,then what is the necessary to produce petrol??even for the small vehicles too we can use less diesel….why we are using petrol??
i m not satisfied with some of the comments given above……..
WHY PETROL ENGINE R MOSTLY USED…COMPARE TO DIESAL ENGINE…………
For the house hold purpose,which variant should i prefer?petrol or diesel?
If diesel is more powerfull vehicle then why we used patrol vehicle for domestic purpose? is patrol vehicle is long life?
I want to know why we used petrol vehicle more for domestic purpose,if deisel have more efficient than petrol?