[Piwoslaw]

Originally Posted by jamesqf

No. From a pure physics POV (neglecting engine inefficiencies, etc) you're doing exactly the same amount of work to accelerate to a given speed: Work (physics) - Wikipedia, the free encyclopedia You're using a greater power, but applying that power for a shorter time: http://en.wikipedia.org/wiki/Power_(physics)

I think we're getting closer to the answer.
Keeping engine efficiencies aside, since greater acceleration means more power, but for a shorter time, then we need to know if twice the power (let's assume twice the instantaneous fuel consumption) will result in half the time needed to accelerate? In theory yes, but after factoring in aero and rolling resistances?