The GTR is 1740kg.. 80 more than the Porche
X2.. and its not like they spent the last 30 years modifying the exterior
Well the car was pretty focused on the course since nissan said they wouldn't actually continue with the production of the car unless it was able to complete the track in less than 8 minutes.
and as stated before, it's competitor was always the 911 turbo not the GT.