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Originally Posted by Piotrsko
In one of my reference books from the 1960's there is a graph that indicated peak torque occured around 2/3 of maximum hp in terms of rpm.
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Variable valve timing, and more recently variable-geometry turbochargers, are changing the game.
Quote:
But that was for rather inefficient large displacement low revving carburated gasoline engines and has probably been superseded in the succeeding 60 years.
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Reminds me of the first 16-valve 1.0L engines of late-'90s in Brazilian "popular" cars, which had peak torque way closer to peak power RPM compared to their 8-valve counterparts.