Audi has always prided itself on making premium and luxury cars that will hold their value, and generally stay reliable for a reasonable and logical period of time, usually finally starting to have little issues around the time the typical consumer looks to replace their car. The brand from Ingolstadt has generally been a byword for quality and performance, but it would be fair to say some of their models are far more popular than others both out of the showrooms and on the used car market.