RS1600is used to win some class victories here in Denmark too. Holger Knudsen was the first, running his black car on occasion from 1986 to 1988. Like most years he never ran a full season with the car, but if he had he would have been a serious candidate for some kind of metal at the end of the year. Most competition was made up by group N Peugeot 205s and Toyota Corollas!
He did a few European TCC races though, but by then the Escort was no match for the Corollas.
Anders Kolstrup showed up for the final meeting of 1986 with an RS Turbo and would run the car in this configuration at select Scandinavian event during 1987. But for the Danish series he had a normally aspirated version, which he used to very good effect during the first half until technical problems screwed everything up during the second half.
Kolstrup was seen in group N in 1988 - in RS Turbo trim - perhaps with the same car, and even later he appeared in at least one entry list among group A cars.
I have never heard of any specific story of either car, so they could have been imports from either England or Germany, but also home grown cars.
Finally Swede Johnny Nilsson had an RS1600i from at least 1985 and finished a fine third in the Swedish series in 1987, as can be seen here:
http://www.volvogrupp-a.se/sm87.asp.htm
Jesper