Why does the Dacia diesel engine have eight valves when 16 is the norm nowdays?
Filed under diesel - Asked by Martin Killeen (Ennis) - Fri, 17 Jan 2014 20:39
Answered by: Shane O' Donoghue - Complete Car Advisor - @Shane_O_D
Hi Martin,
You'd be surprised how many engines still make two with two valves per cylinder (i.e. eight valves in a four-cylinder engine) and actually, more valves are not always better. Generally speaking, an eight-valve engine has better low down torque, where as a 16-valve design allows freer flowing gas at higher engine speeds, releasing more power. However, the eight-valve engines are often more rugged and reliable and of course cheaper to produce.
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