I went from a VW polo 1.9 tdi 100 bhp, to this Golf 1.9 tdi 90 bhp. Comparing the two, the engine of the 90 version is much too dusty and noisy. I went through P-Tronic's external engine reprogramming (box-unit). With the gain in torque and nervousness (just what is needed), I feel more power than on my BMW 1 120D which has 177 bhp.
The equipment is reliable and I haven't had any problems.
Peter D. (Hasselt)