That is an almost unbelievable number. If it's true, then let's look at what the actual crank HP would need to be:cidair said:Swedish Auto motor & sport latest test: M5 E60 RWHP 471,5! :M5rev:
Without tires on rollers, the drivetrain loss will be greatly reduced. Most importantly you have the ratio between the V10 and the AMG 55 motor. If you multiply the ratio of these by the claimed V-10 hp of 507, you get 486.7, which is almost exactly what MB AMG claims. Thus, if M understates the crank power of the V-10, MB AMG understates the power of their 55 motor by almost exactly the same amount.471,5 HP on the wheels. Notice that this dyno is connected straigh onto the wheel center. not the tyre (with the wheel disconnected). 475,2 Nm
Mercedes CLS55 AMG had 452,6 HP on the wheels.
That explains it - The numbers quoted are not really RWHP in this case. Now the drivetrain loss of 10% - 12% seems reasonable. I'd like to see some dyno runs on rollers.bernhtp said:Before you get too carried away -
Without tires on rollers, the drivetrain loss will be greatly reduced. Most importantly you have the ratio between the V10 and the AMG 55 motor. If you multiply the ratio of these by the claimed V-10 hp of 507, you get 486.7, which is almost exactly what MB AMG claims. Thus, if M understates the crank power of the V-10, MB AMG understates the power of their 55 motor by almost exactly the same amount.
There are no surprises here that I can see.
Tom
Sorry, but I believe I was the one who wrote thatAbruzziBoy said:And you guys thought I was crazy when I wrote that I had heard about 530 hp numbers and that the 507 hp figure was pure nostalgic romance for the vintage BMW 507.
The times for M5 and CLS55 are exactly the same as the germantest.m3smeden said:Actually i wouldnt be surprised if a "normal" M5 with some more milage would make even better/higher rwhp. The car in the test did 0-100km/h in 4.7s and 0-200km/h in 14.5 which is one of the worst numbers i have seen, usually it does 0-200km/h in under 14 seconds.
I'll have to second that..... We were driving yesterday, the M5 (still in break in , ooops...) with five people onboard, and me +1 in the Ferrari 360 spider. At some point on I was driving behind the M5 and noticed my friend starting tu huff and puff with the M5 - and so we floored it. The speed was about from 70 to 160 kmh. The ferrari was stickin nicely next to the rear bumper even if the M5 got a jump start. The only problem was that when we stoped, i asked my friend if he really had all the power down, and he replied that yes, I had the pedal to the metal, BUT not the "M button" engaged.........bugger. We ment to have some more interesting races but it started to rain (and we couldnt get allowence from flight control to use the landing strip ) The Hummer you see is kompressor fed and running about 500hp, so it would have been an interesting race (even if the result is propably clear allready)cidair said:Small experience from today - Ferrari 360 stands no chance to the M5 in acceleration!
So he had it in P400 mode or?Nicke said:I had the pedal to the metal, BUT not the "M button" engaged.........bugger.