Setting aside the fact that the DB9 is supposed to be a gentleman's GT car and not a hotrod, Rick, and indeed the syntactical suicide in your suggesting the car itself is claiming the top speed, where on earth did this supposed VMAX of 200 mph come from? The offical performance figures stated by Aston Martin put the top speed of the roadgoing DB9 as 186mph, a figure I'm perfectly prepared to accept as true.
Anyway just because a vehicle can't reach a particular speed on a two mile runway does not necessarily mean it's not capable of that speed given a longer run. The slightest consideration of the length used to accelerate, then brake and also allow for a sensible margin of error and I guess you're left with not much over a mile in top gear. Coinsider then that at near VMAX the vehicle is covering a mile every twenty seconds and anyone with half a brain can see that two miles total length is woefully inadequate.
Also, where is this supposed two mile runway? Even the JCB diesel land speed car is currently practicing at RAF Wittering which has a 1.6 mile of blacktop. I was led to believe this was the longest in the UK, so where has a two mile straight?
Once more it's sloppy journalism and wooly thinking masquerading as fact by an increasingly hopeless Fifth Gear .