In an attempt to clear up the murky picture the world has about the Nissan GT-R’s actual power Motor Trend have embarked on a campaign to measure it using the best methods they know armed with a fresh production-ready US spec R35 GT-R.

On a Dynojet inertia dyno the car made an average of 430.6 hp at 6700 rpm and 425.3 lb-ft of torque at 3900 rpm which equates to at the very least 507hp at the engine if not as much as 570hp at the engine.

Next on their agenda is to get the GT-R on a nice flat runway to test acceleration, braking and handling performance.

Link: Motor Trend – Dyno Test: 2009 Nissan GT-R Makes 507 Horsepower… at least!