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 ...

Do you even look to see if the speedometer works when you buy an old car? When we shop for something built in the 1960s or 1970s, we assume the speedo needle winged off into the night or the cable is ...