Have just heard back from VW Germany, VW New Zealand and Eurotechnik (VW tuning specialist). The car is quoted as 110kw (150bhp) from the factory, the engine build sheet was even e-mailed to me from Germany (how polite and efficient is that). Two main isues have been raised by all 3 parties. Firstly, 60% of power loss problems for the 16valve engines have been caused by overfilling of engine oil polluting the catalyst and resricting exhaust gas flow. The other common theme is the timing being out of calibration.
VW New Zealand suggested that the combination of 150bhp and 1475kg (5 door) means this is not a fast car, the 3 door weighs 275kg less (incredibly) and performs far better. Next stop is a dyno, cat check and possibly the classifieds!