Question about gearing for Top Speed

273 said

By horsepower he must mean horsepower, torque is “basically”output of one revolution and hp is all the revolution added up over time “rpm” can’t have an either or situation an engine make power only which we use Hp to represent and hp is the sum of torque and rpm. You won’t find a formula telling how much torque you need to do x amount of speed but you will with hp.

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I agree with your definition of Horsepower. But essentially a single piston briggs and straton engine making 75 hp and worn chevy 305 V8 making 75hp NEGATE your opinion;torque is what is going to move the vehicle (outside of gearing) and rpm will dictate the final speed of the OP's objective.
Torque AND at max rpm for th eOP's objective is what is needed. Horsepower is also a measure of acceleration and driving constantly at top speed isn't acceleration.