Q. What is the function of 4x2 drive and difference between 2WD drive and 4x2 drive - Compass?

There IS a difference between 4x2 and 2WD. 2WD only supplies torque to the real axle or front axle depending on the vehicle being front-wheel drive or rear wheel drive. The other axle never gets torque because its not connected to the drivetrain. That's 2WD.4x2 has a drivetrain the DOES supply torque to both axles, but only one at a time. There is usually a dial similar to 2H/4H/4L on a 4x4 but it'll say ON/OFF instead. This turns on the adaptive drivetrain which supplies torque as needed to tires that loose traction.

A 4x2 has power at both axels but is a standard 2 wheel drive until one tire slips then the other drive wheels kick in . It's basically giving control to the vehicle to decide when it will be using one drive axel or 2. 2010's Ford ranger sport models had this drive train standard. Works great on small trucks or suvs. My old man has an f150 with it and he gets stuck in 2 inches of mud

It is basically the same. 4X2 means the vehicle has 4 wheels out of which 2 are powered. 2 Wheel Drive is essentially the same thing.