Look Who it Was Random video

why diesel cars give more mileage than petrol cars ? | Explained in Tamil

3,380 views · Published 31 March 2018 · 6:02 · Indexed 12 November 2026

Channel: Electrical Pattarai · 2018 · Education

Watch on YouTube

Have you ever wondered why there exists 2 different engines, Diesel and Petrol (Gasoline) ?. This video is aimed at giving a logical illustration of differences and advantages of diesel and petrol engines. It also answers the questions like, what if I put petrol into a diesel engine or vice versa.Diesel as a fuel has higher energy content than Petrol. Diesel contains 38.6 Mega Joules per litre of energy as compared to 34.8 MJ per litre of petrol. So, each litre of diesel produces more energy than an equivalent litre of petrol. ... Diesel engines can operate at higher compression ratio around 17-21 .
Diesel fuel has more energy than gasoline (diesel has longer hydrocarbon chain).  The engine is more efficient because of the higher compression ratio, longer stroke and lack of throttle plate.  Power is controlled by amount of fuel injected..because ignition is caused by hot air from compression in the cylinder, the engine can operate in lean fuel regime (gasoline engine needs to operate near stoichiometric point or spark will not ignite fuel air mixture...to reduce power, less air is ingested, throttled, and less fuel; throttling decreases efficiency).  Power is a function of torque and rpm at which torque is produced...diesel engines have heavier parts and cannot rev as high as a gasoline engine so power of Diesel engine is less than gasoline engine.  Because of the high compression and long stroke, Diesel engines produce high torque at low rpm.



Why Diesel cars give more mileage?
Diesel V/S Petrol Engine | Why Diesel Engine gives more Mileage? Working, Pros & Cons Explained
petrol vs diesel | Engine difference | which one is best ? | high compression vs low (2018)
Petrol (Gasoline) Engine vs Diesel Engine
The Differences Between Petrol and Diesel Engines

More from this channel