Q: First, thanks for the many years of Car Talk. I head straight for your column every week. Secondly, why do cars still have tachometers? I remember the days when we really did need them. My dad ...

Ever since the first race cars were built, it's been helpful for drivers to know their engine speed. It may sound obvious, but engine power is always a function of engine speed, so accurately knowing ...

Once you've purchased a new tachometer, thoroughly read the instruction manual. Then determine where you want to position the tach. Locating it on top of the dash may work on a race car, but it can be ...