Whoopsy:

All wrong. 

HP is calibrated to a certain standard, with temperature and humidity and elevation, German cars especially so as they all obey the regulations per DIN spec.

They do not account for elevation or non-optimal conditions when publishing HP ratings. 

German DIN standard I believe can have a +- 5% variant. 

And the 720S cannot have a transmission that's has less transmission lose than normal, it has the exact same transmission as the P1, 675, 650, 12C. 

The problem is actually from people testing cars. They never bothered to take the engine out to do a engine dyne test.

All they do is 'estimate' driveline loss to calculate crank HP. It will never be accurate.

So you you agree with me. There is always a small difference from the claimed HP numbers.

I remember watching a documentary about the Nissan GT-R and the engineer said all GT-R(R35) engines have slighly different power numbers. It's impossible to build 2 things 100% equal.

But I agree with you about the dynos. They arent 100% accurate.

About the 720S transmission, I find it hard to believe that in 7 years there isn't any improvement in it.