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why diesel cars are costlier than petrol cars and whether diesel cars have very high maintenance cost after 5 years.

Published On : 2012-11-06 18:51:14.0 anup
Category : Ford Figo
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Diesel cars/trucks are more costly because of the design of the engine. The compression ratio (the pressure in the cylinders that make the power) is 8 or 9 to 1 for gas vehicles and 15 to 1 for diesels. In order to operate dependably at the higher diesel pressures, the engine itself must be made far more massively (all the parts have to be made stronger) and the tolerances must be more exact. This costs more. Also the crankcase pressure (the inside of the block around the cylinders) in diesels is much higher so the seals must be better to avoid leaks. Compound this by supercharging diesels to get enough power out of the design and you have a costly engine to build and maintain. The maintenance cost of diesel cars would be less than petrol cars when compared.
By Arun on 2012-11-07 13:48:43.0
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