at that sort of boost on that turbo i would've expected the power to be closer to 250kw. the lower power output of your car could be due to 1 (or possibly more than 1) of a few things. it could be due to the quality of the tune, condition of engine (compression, etc), the dyno may have been a low reading dyno, if it was hot when it was done then that will affect the power reading as well, and there are a few other things as well which i couldn't be bothered going on about as the ones i listed are the more likely ones. i'd start by getting a dyno run done. this will give you an up to date base to work off. the dyno opperator should also be able to give you a bit of an indication of what the tune is like and whether they think they could get you a bit more power.