Good GPS speedometer for vintage car?

Question

I am looking in to getting a GPS speedometer for an old car with no transmission speedometer drive or any other type of speedometer drive. Can anyone tell me where to find a GPS speedometer that i can hook into an existing GPS unit in the car to give me an accurate speed?

Answer 1

My Magellan Portable GPS unit gives MPH.  Also my handheld Garmin will give you MPH too.

Answer 2

Just get the cheapest handheld GPS receiver you can find if all  you want is a speedometer.  Even an old basic GPS receiver from the late 1990s had a screen that would tell you your speed.  The Garmin eTrex H costs around $80.  Sometimes you can find the Lowrance iFinder GO for around $60.

It sounds like you might already have a GPS receiver in the car.  You need to consult the manual (find it online if you lost it) because there is most likely a screen that will provide you with speed data.