Automobilia etc....

Roustabout

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AWD and 4WD are different. Trucks tend to be 4WD. Most AWD systems have constant distribution across the front and back while 4WD can isolate the back only.

I believe the Audi quattro system (AWD) tends to be FWD biased.

Porsche tends to be the most aggressive in AWD with RWD bias - something like 90% RWD at all times. Other cars run as much as 60/40.
Actually there is a little more to it. All wheel drive is a broad term. In fact, some AWD vehicles are not AWD all the time. Some AWD vehicles are permanent 4-wheel drive.
Traditionally 4WD spoke of a vehicle that had to be engaged manually by the driver with a mechanical shifter. Today we have electric switches that handle these functions, but other than pick-ups, most SUVS have moved away from this. The terminology has been blurred. Permanent AWD means there is some power applied to all four wheels at all times. There may be a permanent ratio or one that can be fluid depending on speed, loss of traction, etc.
Regarding Audis they are not all the same. The lower end versions use a transverse mounted engine and are therefore FWD biased. Other versions use a longitudinal mounted engine and are rear biased.
 
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I briefly had the GT convertible with performance package - problem was to get to 8/10s driving dynamics meant doing over 60 through neighborhoods. Extremely capable. Track time needed for full fun.
 

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