The 7:59 R33 GT-R record is bogus. The car wasn't in production trim. It was one of the final development vehicles, and was running non-standard boost, Comp-R slicks and a full cage. Of course, that means it was basically a 400R (plus a cage).......R34 V Spec II NUR held the fastest lap time for a production car at the Nurburgring at 7:52, seven seconds quicker than the best R33. but i don't know the year. that time has probably been superceded by now.
I'm not sure about the 7:52 time achieved by the R34, but technically that means the first "production" car to crack 8 mins was the Porsche 996 Turbo.
Still, I doubt the the 997 Turbo nor the new GT-R will be able to match the XTR4's sub 7 minute lap.