Did a few more tests.
Started a stopwatch, and at the same time, zeroed the trip meter above the mileage on the dash.
Results covering 1 mile, according to this calculator:
https://www.gigacalculator.com/calcu...calculator.php
Needle on 40mph - 1min 35 secs - calculator says 37.8mph.
Needle on 50mph - 1min 15 secs - calculator says 48mph.
Needle on 60mph - 1min 5secs - calculator says 55.3mph.
Other online calculators say different speeds. This one:
https://www.calculatorsoup.com/calcu...calculator.php
...........is 4mph over the 40, but says 57mph on the 60. You'd think calculators would all be the same eh!
Anyway, did another test.
This time with an assistant, with Google Maps GPS on their phone.
Did 3 runs at each speed over 1 mile:
Needle on 40mph - Google Maps GPS - 38mph 37mph 37mph.
Needle on 50mph - Google Maps GPS - 48mph 47mph 47mph.
Needle on 60mph - Google Maps GPS - 57mph 56mph 56mph.
Pretty consistent there then I think, and looks like my speedo needle is reading 2 - 3mph over, which is what it's supposed to do........right?
It still doesn't solve the mystery of the speed limit warning, set at 60mph, but going off at 67mph. That would mean the car is doing around 64mph.
I then set the speed limit warning at 55mph........it went off at 62mph.
Still as confused as ever
