well I will be honest, whether it was right or wrong of me, the fastest I've driven is 145mph (GPS roadpilot speed) in a 4x4.
The fastest I've driven in a car is 138mph and the reason I know it was that speed was because I had one of those output things fitted to my subaru that when you pressed different buttons and it gave all different types of readings.
The best sensation of speed I get is when I never break the national speed limit but I am in my Mini and we are driving the twisty roads.