This article is from the Watercooled VWs General FAQ, by Jan Vandenbrande with numerous contributions by others.
A: This is normal behavior in all A-type (and probably other) VW's, and for
that matter many other cars as well.
VW dials in a lot of rear roll stiffness to reduce understeer.
This with the limited rear wheel shock/spring travel distance
causes the rear inner wheel to be lifted during hard cornering.
It does not reduce performance much because the inner rear wheel
has very little load at that point.
Many other cars have the same feature to some degree or another.
If you think a Porsche 911 will fix the problem, look closely,
they lift their inner front wheel during hard cornering.
 
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