There's always good and bad I guess.
My comments were based on these examples:
1- 53 Reg A3 100K-ish. Loads of electrical problems, each costing hundreds to fix. MOT bills over £500 for the last 3 years. Car is not used much.
2- 54 Reg A3 120K. Alternator went leaving driver stranded, £600+ bill. Turbo went, stranded again with £500+ bill. Other little probems in to the 100's with all work done at mates rates.
3- 07 Reg A4 with average miles. Engine blew up costing thousands.
4- 06 Reg A4 100K. Loads of little problems with parts costing a lot. Lad at work does the work and is always over the pit.
All these examples are friends or work mates cars and are treated well with proper servicing. Wouldn't have one given now.
VAG group make some of the best diesels around. Admittedly I had to replace my alternator the other week, which was £320 + labour, and the aux belt etc, but that's mainly because my wife ignored the car telling her something was wrong when I was in Spain, and the belt knackered everything. Yes, they need looking after, but they are fast, and reliable. I don't have an Audi, but a Seat which is basically the same, as are VW, Skoda, Mazarratti and Bugatti etc
Diamond Back WCF 4.0 96; Diamond Back Axis 94; Diamond Back Axis R 96; For sale Diamond Back Axis Pro 93 frameset 19"
Gone, not forgotten: Jamis Dakar Sport 89?; Diamond Back Topanga 92; Diamond Back Ascent 93, 94 & 95