How much will the S63 cost? Judging from other AMG models i would say double the price of S8. So when it comes to power /price , S8 will have the advantage.

As much as that! Well then in that respect I'm not going to get my knickers in a knot for .5 of a second. The S8 would always be my choice in any event.

The new Torsen C (which S8 uses just like any rear biased Audi - see RS4 , Q7) is apparently more compact and lightweight than B which was used before and so the engine can be placed further in the back thus improving weight distribution and also allowing the use of longer engines like this V10 which wouldn't normally be used.
As for the W12 vs V10 debate, my vote goes to V10. W12 hasn't got the smoothness and respose of a V12 engine.

Utterly disappointing! Performance and looks.

I have no interest in this car whatsoever. Let's move on

What's the fastest , more powerful version of 7 series? And how much does it need for 0-100 km/h?

Doesn't matter Yannis. BMW has no car in the sporty luxury segment.

They have the V12 with 450 hp also, but that is no M version of any sort, and not intended to race with.

Clearly, the S63 and S8 have a big gap between them. That's a shame for the Audi imo.

Seriously the S8 is NOT POWERFUL ENOUGH for bragging about it in forums like this one. We all know that fan boys like you and me always want their favorite company to trash all the others in every posible way. That is simply not the case here.
On the other hand given the price, horsepower and relatively low weight it's still one of the best cars on this planet.

Very true.

It's just that I expect the one German company to outdo the other two lately when something new comes.

I think its nuts that people only look at how many horsepower the car has. Horsepowers isnt everything. It's the whole package that matter and Im certain that S8 will be a killer.

Listen.. i agree with you that HP isnt everything.. but when you have cars this size and weight..you aint gonna get no supertrack performance from them.. hence no M7 accoriding to BMW fans.. cause its to heavy and big to be a real M car..
In these cars you need huge power huge torque to get you flying in a more or less straight line on the autobahn.. and some kind of stiffer suspension for some occasional driving on curvy roads.. and thats it
But still 450hp will make it haul ass pretty good.. but still compared to the competitiors its weak.. but generally speaking its a monster...