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Ian Gibson ASKED THE GUIDE

Horsepower vs kilowatts

Thirty years ago the automotive industry changed from imperial to metric units for engine output, from horsepower and foot-pounds to kilowatts and newton-metres. But, for some time now, Maserati has been advertising power figures only in the old, numerically higher imperial measure - its petrol V6 is said to have 410 horsepower and not 306 kilowatts. Is this misleading advertising?

Paul Gover ANSWERED BY Paul Gover
20 October 2014

It's not just Maserati. Renault Sport cars - the Megane 265 among them - take their names from the engine's rated metric horsepower.

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