Motor Trend Magazine pitted a Nissan GT-R vs a Shelby Super Snake. The GTR put 413 hp to all four wheels, the Super Snake 635 hp to the rear wheels. In real life its not all just about horsepower, as the GT-R destroys the Shelby in the quarter mile.
The dyno testing looks like it was done at K and N Engineering, the quarter mile was run at Fontana, but opposite the normal direction run. Those magazine people are crazy.
Source : YouTube