Reaching their peak
 

At what mileage does a properly looked after and serviced UK Impreza reach its peak performance? In the past I had a Golf GTI which at 5 years and 80k went far better than at a year old and 9k. My Cosworth Escort went the other way: fine at 5k then lots of problems and never seemed to loosen up. Any ideas?

bit of a silly question.. all depends on the car, the owners, the service history, hows its driven etc. etc.

How long is a piece of string :D

Doubt that you would ever get a definative answer.