I'm seeking a precise description of engine torque.
We talk about torque in terms of the twisting force that the piston exerts on the crankshaft with a radius equivalent of the rod throw.
Assume these two scenarios:
Engine 1: 6 cylinder, 2.5L diesel making 480 Nm torque
Engine 2: 4 cylinder, 2.0L diesel making 390 Nm torque
Cylinder volume on eng 1 is 2.5 / 6 = 0.416L
Cylinder volume on eng 2 is 2.0 / 4 = 0.5L
So its apparent that the cylindrical volume on the smaller displacement engine is larger.
How come the 6-cylinder engine produces more torque, instead of only smoothening out the performance due do less crank rotation per firing event?
I'm thinking that torque is measured with two crank rotations in mind.
Am I correct on this assumption, and if not - how is engine torque described precisely?