What does RPM stand for? – KFOR Oklahoma City

(iSeeCars) – The automotive world has a language all its own, including a wide array of acronyms representing a similarly wide array of technical features and characterizations. In the case of “RPM”, the letters stand for “revolutions per minute” and represent the number of times an engine’s crankshaft makes a full rotation every 60 seconds, typically presented in a vehicle’s tachometer within the gauge cluster.

Because RPM measures engine speed, it plays a key role in areas related to engine specifications. It is utilized to calculate horsepower, leveraging the formula “Horsepower = Torque x RPM divided by 5252”.

Horsepower generally increases as engine RPM increases, but there’s always a sweet spot where an engine hits peak horsepower before it starts to fall off, even as the revolutions-per-minute continue to rise. This makes RPM a primary factor in determining transmission shift points for maximum performance or fuel economy. On new cars these shift points are usually…

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