The AUDI A4 (2001-05) 4DR SALOON 3.0 QUATTRO SPORT is a premium, four-door executive saloon: a more grown-up alternative to mainstream family cars, aimed at buyers wanting comfort and a polished image. Its 3.0-litre engine and four-wheel-drive system give it a stronger, more sure-footed character than ordinary A4 versions, though fuel and maintenance costs may be higher. It suits commuters and small families who value a comfortable cabin and confident year-round travel, as well as enthusiasts seeking an older Audi with brisk performance. Compared with rivals such as the BMW 3 Series and Mercedes-Benz C-Class, the A4 is known for understated styling, a quality feel and the extra traction of quattro; this Sport version pairs that appeal with a more purposeful look and driving feel. mycarcheck.com checks logged 96 look-ups across 38 VINs. Average mileage: 141,000 miles; annual mileage averaged 9,000, and previous keepers averaged 6.5. Average private-sale valuation was £300.