It all depends where you start and end... The problem is (assuming nothing else changed) as the air speed increases so does the drag exponentially, the faster speed you got to, to start with, the more power you need to go even faster.
A generalised drag equation look something like this:
Drag = Cd x (d x V^2)/2 x A
Cd is the co-efficient of drag that is a constant the represents the slippiness or otherwise of the object it does change unless you change the aero
d is the air density (That does not change by much)
V is the velocity and is squared
A is the area of the body referenced (also constant)
So that pesky speed has an awful lot to answer for and gets exponentially worse the fast you go... booo!