LOL, you're just inviting me to give you a lecture.
Ok, first, power is torque multiply rpm. Let's write this in simply equation. a = b x c
Let's say you have a b that is constant, like that straight line curve of torque of your car (which is damn good curve if you ask me).
Let b constant have a value of 10.
So for different values of c in increment of 1
c b
1 10
2 10
3 10
4 10
5 10
6 10
7 10
8 10
9 10
10 10
Please multiply for a and see if a is increasing or constant. Then replace c for RPM and b for your torque and you will understand the whole concept of this engine dyno thing why peak hp DEFINITELY happens after peak torque RPM.

Added on January 15, 2012, 6:47 amTo demonstrate how hp can go up even if torque goes down.
1 11 = 11
2 10 = 20
3 9 = 27
4 8 = 32
5 7 = 35
6 6 = 36
Added on January 15, 2012, 6:49 amTo demonstrate how hp can go down
1 11 = 11
2 8 = 16
3 7 = 21
4 6 = 24
5 5 = 25
6 4 = 24
7 3 = 21
Added on January 15, 2012, 6:55 amAnd if someone can show me car can have peak power at an RPM before peak torque RPM, I would treat him eat anything he wants.

Added on January 15, 2012, 7:07 amI understand all that, but right now I'm thinking if I'm better off with a DOHC or a MIVEC, with the cams, the high end torque and power is better but still quite low to what you can get from a DOHC.
Thanks, I do know of the formula... But your explanation good enough to make me understand further...