340 Vs 360

But 342 HP in your example accelerates at exactly the same rate as 171hp because they both have the same force being applied, torque. More torque equals more force equals more acceleration. More horsepower does not necessarily equal for force, just the same force spinning at a higher rpm..

Torque doesn't accelerate the car alone its Torque X Rpm that does which is HP. Which is the definition of horsepower is to move Weight over a Distance in a certain amount of Time, EG... accelerate a car (weight) over a 1/4 mile (distance) in a E.T. (certain amount of time). If torque only mattered then they wouldn't of needed to come up with horsepower ratings, rpm is an equal force to torque, without either your car is going nowhere.

Its still all about torque, HP cannot even be measured independently, its a mathematical derivative of torque, acceleration is only a factor of torque.

Again its Torque X RPM