I'm going for a test drive next week with a view to buying the car, but the nearest dealer to me can only offer me a drive in a 2.0 TDI 140. I've got in touch with the next closest and they might be able to get a 170, but it'll only be FWD when I want quattro.
Other than the obvious difference in power between the 140 and 170, and less traction in extreme circumstances, is there anything I should bear in mind regarding the differences? I'm mostly wanting to check approximate performance, feel, driving position, interior etc - whether my car is a bit quicker than these isn't as much of an issue as I'm not intending to completely rag a car I don't own. I assume it's just going to be a bit slower and less grippy, so if I'm happy with the one I test drive I'll be delighted with my own.