Depending on if stock or with various upgrades, anywhere from 116 to 130 HP on average with 68 to 78 Ft/Lbs of torque.
This can very widely depending on statue of tune, exhaust system, if the soft rev limiter is used, etc.
A current I-4 liter bike or Ducati 1098/1198 it ain't.
But it's pretty much on target for bikes of that era.
Even the GSXR-1000 in 2002 made 142-144 HP stock. That's only 10 to 20 HP more on average than the RC51. As well as the 996/998 and 999 Ducatis.