Ok here goes, basicly ive inherited some money which i am going to purchase an a3 tdi with. It's my been my dream car for a while now so as i am now in the position to buy i am going to go for it. I am going to go for an s-line around a 56/57 plate. BUT i cant decide weather to go for a 140 or a 170? As in the future i will be getting it remapped. Ive looked on a few tuning sites such as jabba sport and the gains seem to be much greater on the 140 than the 170? Help would be much appreciated of you go guy's in the no.