“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, #internal #combustion #engine #rpm #crank #cranking #crankshaft #rev #revolution #revolutionsperminute #engine #4stroke #4temps #mechanic #ohc #sohc #piston #mecanica #mechanical #engineering #automotive #automobile #vehicle | Auto Veteran