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 ...

Viewer-submitted questions for The Car Doctor: Q. You have recommended a Slime wall-mounted air compressor in your columns. Is there a particular model you had in mind? A. I used the Slime “Garage ...

When cruising along the highway, there is a large discrepancy (6 to 7 per cent) between the speedometer on my car and the readings given out by my GPS system. Which is more accurate? The art of the ...

Q:I operate two vehicles with two different aftermarket GPS systems, each gives me conflicting speed readings in relation to the vehicles' speedometers. Which is more reliable, the factory installed ...

It was a GPS navigation system that got me thinking about a dedicated speedometer. The downside is the cost and the relatively small speed display in a device meant for route finding and directions.

Apple recently revealed a new version of its CarPlay system for vehicles, which include gauges like speedometers. But even Apple, the company that cast aside tradition when it reinvented phones, music ...