RPM stands for Revolutions Per Minute. It is a measure of how many complete rotations an object makes in one minute, typically used to describe the speed or rotation rate of engines, motors, and other rotating machinery.
Try and quickly up shift to higher gears, so that you can maintain a lower RPM at high speeds. (motorbeam.com)
However, most drivers never use the high RPM ranges of their engine, so they only use a fraction of the engine's available power around town. (bestride.com)
The wide gear ratio spread helps maximize fuel economy by helping lower engine rpm in city and highway driving. (greencarcongress.com)