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==== SAE gross horsepower ==== | ==== SAE gross horsepower ==== | ||
Prior to | Prior to 1972 most American automakers rated their engines in terms of '''SAE gross horsepower''' (defined under SAE standards J245 and J1995). Gross hp was measured using a blueprinted test engine running on a stand without accessories, mufflers, or emissions control devices. It therefore reflected a maximum, theoretical value, not the power of an installed engine in a street car. Gross horsepower figures were also subject to considerable adjustment by carmakers: the power ratings of mass-market engines were often exaggerated, while those for the highest-performance [[muscle car]] engines were frequently underrated. | ||
=== Brake horsepower (bhp) === | === Brake horsepower (bhp) === |