Talk Morgan Forums Community Vehicle Talk (non-Morgan) GPS Speedometer

I don't have a lot of faith in GPS speedos. I am sure they can be quite accurate on a straight road in open country but in the city where there are tall buildings, or in a mountain valley, it is too easy to lose the signal of one or more satellites and the speed can not be accurately calculated. Judging from the GPS navigator and the GPS system in my dashcam it is also difficult to have an accurate speed on a winding road.

A better bet may be to get a small, cheap android phone (no SIM required) that has bluetooth and an OBD II bluetooth adaptor. The phone could then be mounted in a convenient place and with an application such as Torque can be set up to display the real speed of the car. It could also be used to view and/or correct any fault codes.

Naturally you could always use an existing phone. One way or another you would probably not leave it permanently mounted as it would be too tempting for the tea-leaves.