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You are just using semantics. Conceptually Horsepower takes into account engine torque and the effect of RPM's. Both engine torque and high spinnin RPMS generate energy or "power". It is this combination of the two sources of force/power that act and are multiplied through the gearing, which is the third componenent. What you get is this net force applied to the wheels which when rotational as in a car, is measured in torque. I am sure there are a 100 more complicated factor but that is the basic flow of things.
Engine torque combines with engine speed and give you a total "energy" Multiply this energy by the gear/final ratio and that is your energy at the wheels. You can convert this energy into whatever measure you want. If you dont want to call it torque than conver it into whatever you want, but net energy there is a product of torque and RPMS (this is HP-it basically combines the two important producers of power from the engine into one figure-)
That is why HP is what always determines how fast a car is. The easiest example cited many timse is F1 cars with 700 hp and 2** foot pounds. The 18k rpms produce so much power that the torque of the engine does not need to contribute nearly as much and all of this makes the wheels. go.
Some heavy torque monsters may be all low end torque with max of 4k rpms like a diesel. In that case its the inherent engine torque doing all the work, or most of it and littel contribution relatively by engine speed. The only difference is typically where the power is delivered given the same HP. HIgh low rpm torque get low end torque. Low torque, high revs get power once high in the revs.
Obviously you know that but a summary to be complete for anyone else
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