The drag racer has two variables when building his/her motor, horsepower and torque. High torque motors have different gear ratios to high horsepower motors. Building torque (heavy squats) requires a different focus (gears) when sprinting. I suggest Ben was high torque and Charlie managed to use it to the max.
This is not in my words: a copy and paste.
Here’s a simple way to visualize torque: Imagine holding a 1-pound weight straight out, with your arm parallel to the ground. My arm measures about two feet from shoulder to wrist. If I hold a 1-pound weight straight out, the torque my shoulder experiences is roughly 2 foot-pounds (2 feet times 1 pound). If I were to hold a 10 pound weight in my hand, then the torque on my shoulder would be roughly 20 foot-pounds (2 feet times 10 pounds).
Now think of this turning force applied to a wheel, such as if a lever was attached to the center of an automobile wheel. The more force you apply on that lever, the more torque you apply to the wheel, the more readily the wheel turns, and the faster the car starts moving. See where I’m going with this? Torque is a measure of the ability of an engine to do work. It’s a component of, but not the same as, the (horse) power of the engine, which is the rate at which work can be done.