Various sources are reporting that Porsche is accusing Nissan of cheating the Nissan GT-R Nurburgring record of 7:29. To test the claim made by Nissan, Porsche engineers say they bought a GT-R and put it against the Porsche 911 Turbo and the GT2. What they have discovered is that the GT-R was constantly getting lap times of 25 seconds slower than the claimed record.
Porsche believes that the GT-R used for the Ring record was not a series production car and that maybe, it was equipped with different tires that offered better grip.
The company also said the 911 Turbo and the GT2 used for comparison achieved better times than the Japanese sportscar. Porsche initiated this test of Nissan's claim because the 911 is heavier than the GT-R and has similar power, but did not get such a good lap time of the Nurburgring.