Tachometers are designed to measure the speed of rotation of a device. However, most commonly, tachometers measure the revolutions per minute (RPM) that a car engine produces. In the middle of a race, and even on a freeway on-ramp, having an accurate reading on your RPM can be the difference. While you most likely won’t be competing in a famous race it is still essential to know how hard your engine is working, to protect its components. Digital tachometers have brought in a new age of accuracy, while classic-read tachometers bring vintage style to your cockpit. If you’re on the lookout for deadly accuracy and easy-to-read displays to take to the track, or just put a touch of finesse in your minivan, here are our choices for the best tachometers available.