for what its worth regarding numbers... the os18 was dynoed at 1.6hp, os normally hold back a bit with published figures.

its the torque of the .18 compared to that of a .12 that will be the issue with the diffs, i feel.

i heard somewhere that the NT16 is more around 0.9hp that 1.2, but its all just numbers anyway, dont get to worried about them mate, as i am sure u know, there are too many variables, and porkie pies involved with hp claims.