Here are the results for 4 cars that were done a year apart on the same rollers.
The last 3 cars were completely standard and unmodified both times.
But look how different the torque figures are.
To be honest I wasn't recording mileages and can't even remember what mine was the last time.
But of the 4 cars that ran both times 3 are still standard (guess whose isn't).
So here are their old and new figures. old/new
owner @ the wheels @ the flywheel torque
Me 180 / 197 227 / 247.5 237 / 260
Colin 184 / 187 228 / 236.5 230 / 252
Alan 175 / 185 218.5 / 232 225 / 251
Dave 183 / 187.5 234/231 228 / 253
Mike