mk1 - the first, obviously
mk2 - bread van, my first.
mk2 phase 2 - bread van and coupe with facelift G40 etc
mk3 - the roundy one
mk3 phase 2 - mk3 with facelift and suspension tweaks. 2000 - 02ish, GTi etc.
mk4 - current 'tough new polo'
mk4 phase 2 just announced, not out yet.
