Hi mate,

You're quite right nothing has changed. Rolling roads will always be a joke when it comes to giving any meaningfull power figure or being usefull for full load mapping! I personally would rather trust a map I had best guessed whilst sat drinking tea and watching the TV than a car actually mapped on a rolling road!

Rolling roads are great for diagnostic work and basic things like light load mapping, but totally hopeless for any form of flat out mapping!

Oh I forgot to add, Rolling road figures are great pub talk! Sadly the bullsh!t stops when the car hits the tarmac, where times dont lie!!