I agree with the rest exactly except RPM is the rate at which work can be done and Torque is the amount of work that can be done in one period together equals Horsepower.
Rate X Amount / 5252 = work over time
Look at it this way you got two shovels (torque)
And one twice the size of the other and two guys are digging a holes the guy with the smaller shovel is digging twice as fast (RPM ) as the other guy he's gonna move the same amount of dirt over time.
Now you got two one cylinder engines and one is twice the size of the other and each power stroke they make X amount of torque in one period of time. The one twice as large should make twice the torque as the other so the smaller has to do two power strokes to do the same work as other to do the same amount of work over time.