Nissan has reportedly lowered the GT-R's lap record around the Nurburgring, setting a 7m 26.7s best.
The Nissan GT-R had previously set a best lap time of 7m 27.56s.
The time is reported to have been set in a standard, European spec GT-R, although this has not been confirmed by Nissan.
Rivals Porsche insist this is not possible, saying a standard GT-R would be capable of no more than a 7m 54s lap.
The Porsche 911 GT3 recently set a lap of 7m 40s at the track.
Testing is currently continuing, and although Nissan has a GT-R Spec V at the track, no lap times have been released for it.