OK, not strictly true. A chipped 2.0TDI (180bhp) appears to be faster than a std 3.2 round a track, according some testing Autobild have done round a 2 mile track. http://www.autobild.de/aktuell/reportagen/artikel.php?artikel_id=7659&artikel_seite=1# I don't know German, so do not know whether the same person drove each car (175 of them) under the same conditions. But there are some strange-ish results there from which you may infer that it wasn't or conditions changed. Still, QI.