Here's a list of all the official testing done on these cars.
If you know of more test I will be happy to add them, just write here or send me a pm.
http://www.rs6.com/pdf/Acceleration.pdf
Note that the CCX-R was on petrol so = 806 HP.
It's my understanding that the Veyron tested by EVO (privately owned) was without LC, but I'm not sure.
If anyone can verify that I'd be happy.