With respect to speedo accuracy, I agree with Graham. Having just done Lands End to John O'Groats with Keith Alcock in his 1993 +4 (which was at Buxton on both days) we checked the speedo on the way down to Cornwall and it was over reading by almost 10% as against the satnav. However the distances measured on the mileometer were pretty accurate to the satnav and to the printed routemaps that we used for LEJoG (didn't use the satnav for the run itself!).
So far as fuel consumption is concerned, Keith has got the log that we kept, but I 'm sure we did over 450 miles on a tank, which means at least 37.5 mpg depending on how close we were to empty! (I think that tank capacity is 55l). We're planning to analyse the log next week.
Total journey without motorways and calling in at the factory and at Kevin Vernons was 928 miles, and the total journey time including stops was 30 hours.
Great trip!
Malcolm Tatton
