Torque is a twist and is applied to an object to make the object
turn about its axis of rotation. It deals with rotational motion.
It is similar to a force being applied to an object that changes
its linear rate of motion. When torque is applied it changes an
objects rate of rotational motion. The magnitude of the torque is
measured by multiplying the perpendicular component of the force
applied by the distance between the objects axis of rotation and
the point where the force is applied.
Torque = Force x Distance
Ex: A weight hanging from the far end of a beam creates a greater
amount of torque (and therefore causes the beam to bend more) than
if the same weight were hung from the middle of the beam.
Now what you need to do is to be able to translate how torque
will affect the speed and acceleration of the car. You need to
understand the relationship between the Torque, the acceleration
and the speed and what other factors influence them.