Speedometer/odometer accuracy

[steve-p]

Anyone else ever checked the accuracy of the speedometer and odometer using GPS? I found that at an indicated 80 mph, it is overreading and the real speed is only 75.5 mph. Strangely, the odometer is wrong in the opposite direction. On a 126 mile trip it underread by about 10%, so this means that the car has done 10% more miles than I thought. I will of course retract this statement when I come to p/x it against a turbo at some point

[bluesatin]

I also have the same problem with the Ultima. The dials are VDO with the speed being accurate (+/- 0.5mph) at 40, 60, 80mph but the trip is approx 30% out, can't work this out. Also Domster you have been very quite- how were the sheep in Wales

[Ultra Violent]

I've found another inaccuracy. The manual says there are only 2 seats in the back yet I managed to squeeze in 4 birds on Friday night. Even more odd, leg room never seemed to be compromised

[domster]

Jeez, UV, will you leave those hookers alone?

Honestly. One divorce plus annual bonus and you start trying to set a new Guiness World Record re accommodating ladies being accommodated in a Porsche 911

Didn't see any sheep in Wales, bluesatin - they must have been indoors with the welshmen at the time. Nice tunnel on the M4 though, much narrower than Hatfield - pity it's too far for a sortie.

Cheers
Domster