I'm by no means an expert, but I was lead to beleave that a revolution was a revolution & with the drive train being the same, regardless of horse power & torque at any givin rpm you would still be turning the same speed. Increased HP & tq just brought about how fast you could gain rpm thus making the gain in speed being quicker lowering the et and raising the top speed in the givin distance. With this being said in cars with over drive or real high gearing if you don't have enough power you can't reach the reclined in high gear. I could be wrong about this & the only thing I could use to back this up is Wallace racing has an automotive calculator that will tell you what speed you are going using tire diameter, rpm and drive ratio.
Just my .02$