In reply to Beat me to it!:
> Yes subaru is AWD full time permanent symmetrical. So it's always switched on, rather than some of the poor AWD systems which only do anything once the driven wheels have already lost grip. Exact distribution between axels varies between axels based on transmission type manual / automatic / cvt. Manual starts off 50. / 50. It also has 4 channel ABS, so can brake individual wheel independently to maintain maximum grip.
> It's also a boxer engine, lying horizontal, so very low centre of gravity . The boxer layout is also symmetric, so there is not transfer box required for the AWD which makes for an efficient transmission.
> AWD and 4WD is very much blurred but the Subaru systems works really well.
Yeah the full time AWD systems are better than the part time ones. Though given the same tyres etc I'd probably put my money on a decent 4WD system such as a modern Landy. Though nothing can compete with an off roader with front, rear and centre difflocks. Like mine below
http://imageshack.us/photo/my-images/36/wx82.jpg/
http://imageshack.us/photo/my-images/716/b6ys.png/
Clearly overkill for a mostly road going car though.
Though can you explain why a boxer engine wouldn't need a transfer box? Maybe I am just half asleep but you still need to split the power front to rear as any engine (boxer or not) still has power coming out of the flywheel end of the engine as a single clutch location is needed.