European Quattro Coupes

["Karl Nordstrom" <KXN2@PSUVM.PSU.EDU>]

>The first major revision to the Quattro Turbo Coupe was the introduction of
>the 20-valve engine (S4 engine), Torsen diffs and ABS, available in Europe
>only at $55k US.

I have read here on the Quattro list that Audi continued selling the original
Quattro Coupe in Europe after it was discontinued in the U.S.  How long was it
sold there before they changed to the new Quattro Coupe.  We got the new one
in '90-'91 I believe, but with out the Turbo.  I've read that the '86 European
Quattro had the Torsen diffs and the full time ABS, but when did the European
Quattro get the 20v engine?