Just wondering how accurate the A3 speedo is, compared with satnav/GPS readings?
I was in a borrowed 1.6Fsi Golf to Manchester and back this weekend, using a borrowed Tomtom.
Assuming the Tomtom is accurate, the Golf's speedo was hopelessly inaccurate.
An indicated 55mph was a true 50mph.
An indicated 90mph was a true 82mph.
So this thing was right on the 10% limit for speedo accuracy.
I ended up ignoring the speedo and looking at the Tomtom readout.