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Why an eight-valve diesel engine from Dacia?

Why does the Dacia diesel engine have eight valves when 16 is the norm nowdays?

Martin Killeen (Ennis)

Jan 2014 Filed under: diesel

Expert answer

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.

Shane O' Donoghue - Complete Car Advisor

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