just my idae na kub
i;m not know about it that much, because i'm not machenics
but what i read is that HP those came in brchoue is not power you really have on wheel
The power those engine have are on flywheel
like what i read in magazine, 350Z VQ engine can produced 300 HP peak, but it only on fly wheel. but after all power transfer , top of power those new 350Z can produced on wheels is only 250 HP
so i guess HP that you have can depend on a lot of thing, but on new car it's should not be that much different from brochoe, may be a bit low
But agian that's just my idead,
i pretty sure somebody in here can explain it better
IF i'm wrong plz correct me na kub