Yes, "Prated = 151 kW", I assume, is the rated horsepower, which is 205 on an ST200 from the factory. Known fact.
"Pwheel = 111.2 kW", we are guessing, is the power at the wheel, or the actual dyno reading. This converts to 149-150 horsepower, which is very very low.
I hate it when dyno jockeys presume to state actual BHP numbers when they can only reliably read the power at the wheels.
As for what you should expect - my worn-out old 2.5, on a stock map, with intake, headers, and exhaust, put down 157 horsepower on a dyno. And since the ST200 started out with 30 more than I did, I would think you should be making at least 197 at the wheels.