The AUDI A4 (2001-05) S4 4DR SALOON 4.2 QUATTRO TIP AUTO is a compact executive saloon with the pace and all-weather confidence of a performance car. In the UK used market, it sits above ordinary A4s as a distinctive older alternative to sporty BMW 3 Series and Mercedes C-Class models. Four doors make it useful for everyday driving and small families, while the automatic gearbox and four-wheel drive add comfort and reassurance. Its powerful V8 character makes it especially appealing to drivers who want rapid, confident progress rather than low running costs. mycarcheck.com records show 197 look-ups covering 37 different VINs, suggesting continued interest in a niche model. Across those checks, average recorded mileage is 123,000 and the average is nearly eight previous keepers; an average private-sale valuation is £1,000, so condition and history matter greatly. It is a characterful choice, but buyers should budget carefully and check service records.