Read this
I do agree with this thread! Having the benefit of a 140ps TDI and a GTI on my drive i can compare them back to back. in real life terms the TDI has a kick in city and motorway driving! dont get me wrong the GTI for is better suited for me but the 140TDI torque makes it a fun car to drive around in.
I cant comment on the GTD as i havent had the pleasure of driving it!
I would say that if u want a car with low running costs and which you can have a shove of mid range acceleration then i would go for one of the TDI's
If you want one that u have to make scream to get the surge of excitement then i would go GTI.
Either way you cant go wrong with which every one you pick at they all have a great character which you wont get with any other model!