Only one's Ive seen pumping out 150 (the latest models are 2.0lt pushing out 140 hp), are chipped ones and to be honest, there quick but long term, will cause damage if pushed hard regulary. With the PD engine it's not the BHP which is important, it's the torque thats more noticable from low down. With out doubt one of the best i've driven, for that size engine, only thing I think is better is the new Mondeo, which is realy good but there are problems with front tyre wear, which you will get with the Passat when chipped, as you have problems putting tyre to the road. In it's curent form you can wheel spin in first and second, but pushed to 150+ then it spins in third and not realy pushing the car forward. My opinion just get it remapped, to get the best out of what you got and possibly fit a free flow filter to get more air into the engine, you dont need to go fancy k&n stuff, just something better than standard. The audi A4 2.5 is only 150 and not a PD engine, and IMHO, not as quick as the 130PD. Any 4wd will sap power as your driving something else, ie the extra drive train, (transfer box and axle)thats why running with a/c on saps up to 20% and is noticble when pulling at the top end. I'm sure there's more on here know a bit more so hopefully they'll add a post to this to help you out.