yeah, could be since they're only available before 87 that the bodyshell is a bit lighter, that coupled with the instant throttle respoonce of the k-jet just makes em feel that little bit more nippy. I was taken out in a really early A or B reg 8v after I tuned it, and it felt quicker than my 1990 2.0 8v GTI! That being said this was bone stock, and mine has almost every extra you can get for the MK2, that plus big bumpers probably makes it much heavier than the B reg one!