Many have claimed that cars given to journalists were deliberately altered by Nissan to produce a higher power number than that stated on the official spec sheet (353kW/473hp), and that customer cars would enjoy no such increase. Well, the folks at Car and Driver have decided to put these rumours to rest and have conducted their own independent test of several R35 GT-R's - with interesting results.
After testing a full customer-spec GT-R as well as another late-production R35, C&D come to the conclusion that Nissan is definitely understating the car's power figure and that cars destined for delivery to paying customers should possess the same number of horses under the bonnet as the cars they used for their experiment. How many horses? Think around 520hp (389kW) at the flywheel, which is just 10hp/6kW shy of the advertised output of a 
Porsche 997 911 GT2.
There's still some question marks over C&D's assumption of a 20% drivetrain loss, so don't take their results as gospel. For a truly definitive answer, someone's going to need to rip the VR38DETT out of their R35 and put it on a bona fide engine dyno - a far more involved exercise, but one that yields far more accurate results. Until that happens though, we'll have to satisfy ourselves with C&D's numbers.
Head over to Car and Driver and check out their full article on the GT-R's dyno test here
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[Car and Driver]
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