And this is why a GPS speedometer is not deemed in law to be an acceptable replacement for a factory speedometer. Even if a factory speedo isn’t accurate, its inaccuracy is at least consistent ...

Q: What would be more accurate, my vehicles speedometer or a GPS I have on my dashboard? A: They both can be accurate and inaccurate. Speedometer: Aftermarket modifications, such as different tire ...

There is often a disparity between a car's speedometer and the GPS or navigation device. Which is more accurate?