Just been comparing my mph disaply against my Tom tom over a long journey. At 50 mph on the clock, tom says approx 47 mph. At 60 mph it's 56 on tom. i.e. approx 6% over.
So I guess the speedo's slow as I trust tom & tested him properly in my last car (a beamer). It means I should never trigger any speed cameras if i use my speedo.
So does this mean that the mpg is also showing under? or over (i.e. it thinks I'm doing more miles than I am?)
Just posted an update from my hols where it went up to 34.9. I wonder what it should be?
So I guess the speedo's slow as I trust tom & tested him properly in my last car (a beamer). It means I should never trigger any speed cameras if i use my speedo.
So does this mean that the mpg is also showing under? or over (i.e. it thinks I'm doing more miles than I am?)
Just posted an update from my hols where it went up to 34.9. I wonder what it should be?