Torque baby!!! Seriously torque X rpm = HP so depending where you want the torque that will affect the HP. Big HP numbers look nice on a dyno sheet but in the real world torque down low is what will move you. Gearing is a torque multiplier so remember that in your calculations.
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”
— Han Solo