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SAE gross and net horsepower difference

The difference between SAE gross and SAE net horsepower, including the historical context and variations in measurement.

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Jan 26, 2026
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What is a percentage range of horsepower difference between SAE gross horsepower and SAE net?

The difference between gross and SAE net horsepower is not a fixed number but typically falls in the range of about 10–25% lower for SAE net compared with SAE gross; many authoritative and enthusiast ...