I've just upgraded from the 4.0tdi to the 4.2tdi, and am just as happy with this one as the last. My 4.0tdi had 101k mls and just over 4yrs old, audi gave me £12k for it against the 1.5yr old 15k miles 4.2tdi at 36k, so they depreciate pretty quick. The loss of my trade was made up for with the new one being nearly half price after 18mths. Performance wise, there is a noticable difference at the top of the rev range. Has SE suspention instead of sport on old one, and is a far better ride. The 4.0tdi had a vibration through the car at low speeds when the wheel was on full lock. Dealer say it was normal but the new one doesnt do it. Wouldnt recommend my dealer at all. nice people, but highly disorganised, unable to order the correct parts, and not very knowledgable. Shame, the only drawback of a truly outstanding car.
Dax Byrne, Northants, April 4th 2008