There’s a chance that the section of the tachometer from 6,000 rpm (or maybe 6,500 rpm) to 8,000 rpm lights up when the engine is on to ensure drivers can actually see where the redline is, but ...

RPM measures how hard your engine is working to build speed and/or acceleration, though reaching your engine's redline isn't necessarily the end of the world.

Like most, it's fitted with a 0-120-mph speedometer and 0-6,000-rpm tach. We're following along as Auto Instruments converts it to a 140-mph/8,000-rpm version, as found in Shelbys.

The Mini Tach line offers a small unit that measures 2 13/16 inches wide by 3 inches deep. The tach comes in four models, differing in maximum rpm range. There is a 4000, 6000, and two 8000 rpm ...

The Proform tach showed 2,850 rpm, ... Moving up into the range where it really matters, the Summit Racing gauge was down 200 rpm and the VDO was down 175 rpm at 6,000 rpm engine speed.

RPM stands for revolutions per minute, ... such as 273 pounds-feet at 1,600-4,500 rpm. Many cars have a tachometer to indicate engine rpm, usually measured in thousands.