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sir' pl.let me know the diff.b/w 3&4 cylinder diesel engines in in terms of performance,power, mileage&economy.
By Therumallappa 12 December 2010
Expert`s comment:

In 3 cylinder engine required power is produced in 3 cylinder itself. Volume of each cylinder would be higher than 4 cylinder version. However in 4 cylinder version size of each cylinder is bit less and also volumetric efficiency is better, also gives best of torque output.Hence 4 cylinder version is used much compared to 3 cyl version.

Answer by Shiva Shankar 12 December 2010

Sir, Compression ratio is better in case of lesser volume of the cylinder but it requires higher number of cylinders to achieve the required power.Since in case of three cylinders engine same efficiency is achieved through larger volume, there is higher pressure required that reduces it's overall efficiency.Engine efficiency is always BHP/IHP.

Answer by Partha 12 December 2010
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