What does the torque mean in a car?
Where from does torque calculated in a car? And what is the proportionality between torque and performance?
Technically the torque is used to measures the "turning/torquing ability" of the engine. Practically, torque is a better measurement of how quickly your car will accelerate.
This will give you how torque is calculated - http://hyperphysics.phy-astr.gsu.edu/hbase/torq2.html