To be honest I've seen far more Blue, Oak Green, RED, Black and White Mk2 GTi than I have seen Silver. I base this on the availability of those colour specific body panels. I have seen plenty of Silver Drivers etc but only ever 1 GTi Mk2, and that was in the Gallery. I might even e-mail VW customer services and see if they hold a record on the number and colour of Mk2 GTi's sold in the UK.