Having lots of torque is great, gets it going initially, but you need to sustain a large amount of torque over time to actually get somewhere in short order, thus horsepower. The calculation of horsepower is derived from torque, or in basic sense torque over time. What's most importain in most vehicles is having good torque available across the operational rpm range.. The end result is that a vehicle that gets moving quickly and covers a good distance in short order. Specific vehicle applications may vary.