Cupra 16v book time is 7.8 seconds, book time on a mk2 16v is about 8 seconds. It's hard to find any decent info on mk2s as they are so old.
After doing some searching, the curb weight of a mk2 16v is about 1100 kg, the same as an early Ibiza.
This may not be correct, I will have to check mr.Haynes.