This article is from the VW Technical FAQ, by with numerous contributions by Jan Vandenbrande others.
A: Here is a list of what is interchangable between the various
VW models in the strut-shock area. [From ND BBS]
A1 Models = 75-88 Scirocco 75-84 Rabbit (Golf 1) 80-92 Cabrio
80-83 Pickup (front only) 80-84 Jetta 1
know as A1 suspension design most US models use
internal threaded struts ( can swap for external)
all other use the same inserts and strut bearings
Springs vary according to models
A2 Models 85-92 Golf and Jetta 2 93- Golf and Jetta 3
slight
mods needed to A3 to use A2 struts as all A3 and some
late A2 have sealed (throw away) struts housings.
Springs vary
Others Corrado G60 models can use A2 shocks in the rear
but front are same dimensions but use a larger shaft
and are designed for higher weight load.
Strut housings are similar Strut bearings look the same
But I believe the Corrado ones are stronger. We now
offer HD strut bearings (VR6 Golf) for all the A2 style
 
Continue to: