my clutch is 200 mm and i think 1.8 is 225 mm if im right.If you have a 1.6 I don't see why your transmission would be assembled any different that mine in the U.S.
So I would order the '90-93 part as it should be the same size and go into your car. If you want to he on the safe side ask the manufacturer the measurements of the clutch and find out your clutch's measurements before ordering it.
so if i order a 90-93 clutch it would be ok for my trannsmision then..
thank you fore the info.