* Acceleration (quickness) is dependent on torque
* Top speed is dependent on HP

It may take a looong distance to achieve top speed, since the torque decreases as high-RPM horsepower increases.

In circuit racing the goals are different from top speed contests. I would guess that in your type of racing, you want to select the steepest gearing (quickest acceleration) that allows the highest top speed for the given length of track, while also keeping in mind gear ratios used for slower corners.

That is rarely the goal of a street driven car, as even a stocker A12 will exceed the highway speed limits. So instead most owners will focus on either acceleration (steep gears) or fuel economy (tall gears) or some compromise of the two (middling gears). Perhaps the best performance combination for highway use (120 or 140 kph maximum) is steep final drive gearing (say 4.111 or more, which allows 120+ kph top speed) along with overdrive for cruising. The overdrive does not improve performance/power/acceleration but does reduce noise and increase fuel economy, and is used when not accelerating.