3. Since the power delivered is higher and the rpm is lower Diesel engines are usually high torque engines which is the reason you cannot see petrol engines being used in big trucks or generators (demands more torque). ... Maintenance cost can be higher in diesel engines.To go back to fundamentals, the Otto cycle (as used by petrol engines) is more efficient than the ... What do you prefer for fuel your car : petrol or diesel?.. of cars. Here's Petrol vs Diesel : Performance Compared. ... In a diesel car, the maximum torque is available at lower revs, so you can change up earlier.The question of whether to go petrol or diesel is nearly as old as the car itself. It's an important decision and something that requires a bit of...Diesel engines, almost all of which are turbocharged in modern cars, also offer ... However, because diesels use less fuel, they can emit less CO2 over time. Cost is another big factor in the diesel versus petrol debate. .... By contrast, the 2.5-litre four-cylinder petrol makes more noise for less performance.We take a look at the petrol vs. diesel debate, giving you all the facts so ... Sports car manufacturers will continue to favour petrol over diesel power. ... the "…sonorous roar of a performance petrol engine to the more muted, ...but i want to know the performance of petrol vs diesel engines of swift .... At 3.5k Rpm in 5th gear this car will be doing around 140kms/hr.A petrol car might deliver up to 30% less fuel economy than a diesel ... One point to bear in mind when comparing official mpg figures, petrol or diesel, ... blurred the line between petrol and diesel, both for performance and ...