GPS mph accuracy

[SJEFFB986]

Now I have to double check.... I could of sworn my GPS shows a faster speed than my speedometer. I will check on my way to work tomorrow and confirm.

Either way it's no big deal. It was just a general observation and question for other owners. Thanks for all the input.

[Westwood]

I'm on my eighth Porsche through the years, and they all showed me going 3 mph faster than the actual speed measured by roadside radar signs, and also on GPS in later years.