The gang at Porsche were never happy the GT-R ran around the Nurburgring in 7:29. Porsche purchased a Nissan GT-R and tried it out on the Nurburgring driven by one of Porsche’s chassis development engineers who they claim is an expert with the Nurburgring. According to Porsche, they only managed to get a lap time of 7 minutes and 54 seconds. On the same day, Porsche says the 911 Turbo managed 7 minutes and 38 seconds while the 911 GT2 managed 7 minutes and 34 seconds.

The test using a stock GT-R and Porsche says the GT-R is a full 25seconds slower than Nissan claimed, and subsequently slower than either Porsche. Take into consideration that the Porsches pack more punch and less weight than the GT-R and their suspicion makes sense.

Porsche engineers claim the GT-R’s lap-time, which is videotaped from inside, could not have been from a production car. Instead, they suspect the car was tuned, at least when it came to the tires. Nissan has yet to respond.