S65 AMG driver and owners comments:
"I can tell you guys for sure that this vid is not a fake. How can I be sure of that? Well, I’m the driver and owner of the S65 AMG in this clip.
A stock BMW M5 has got 507 hp (Euro spec). This M5 was tuned by Kellener. That means other camshafts, exhausts, Supersprint headers and ECU-tuning and about a total of 560 – 570 hp. My car is bone stock (Euro spec, 612 hp). My guess is that the power on the wheels is almost identical between these two cars if you consider the power loss of the automatic gearbox with torque converter. The M5 is equipped with SMG gearbox with much less power loss.
Consider these facts: Two cars with similar wheel power, the M5 is much lighter and also has got better aerodynamics than the S65. If you look at things this way the M5 should have beaten me. Why was it then so even? The only explanation I have is that the power of the S65 is a bit underrated and it delivers more hp than Mercedes says it does. Also the massive torque is a big advantage for the S65. "
Btw, the speed at the finish line was almost 170 mph. I don’t know what the result would have been if we could have gone longer. Maybe the better aerodynamics on the BMW had made it faster than me? What do you guys think?
I can also tell you that the Kellener M5 has raced a stock M5 and the Kellener was much faster. I never raced the stock M5 but then I know fore sure that I would have beaten him since I was quite even with the Kellener. "
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