I drive a SsangYong Musso, and the speedometer consistently reads a few miles per hour above my satnav. I have always believed that the satnav would be the most accurate and reliable, but I recently ...

Modern cars surround drivers with digital certainty, yet one of the most basic numbers on the dashboard is quietly biased in your favor. The speedometer is designed to err on the side of reading high, ...

The inaccuracy of the speedometers used by most vehicles, even those in cars with the coolest gauge clusters, is well known. The good news is that most speedometers report speeds higher than the ...