I'd say Koenigsegg CCX(R?). I think someone here had Koenigseggs speeds on different gears on his/her signature?
EDIT: Found it, it was cdbob's signature
"1st gear: 156 km/h 2nd gear: 204 km/h 3rd gear: 278 km/h 4th gear: 328 km/h 5th gear: 366 km/h 6th gear: 394 km/h Reverse gear: 165 km/h"
I's like to see a reverse drag race!
Salar just posted a few days ago that he got a ride in an LP640 and the driver hit 100 km/h in 1st. That's gotta be a contender for the top. I'm curious about this as well?