from what i know about 4x4 ford trucks, which i can be wrong about, the 2 fronts wheels would be locked together with one of the rear tires, with least resistance rear, having power. thus, 3 wheels have power while in 4x4.
what does an impreza have? with the computer transferring power to slipping wheels, does that means it's similar, as in 3 wheels have power?
(or like other brand awd vehicles, where its just 1 wheel up front and 1 wheel in the back and call it awd?)