The AUDI A4 (2005-08) 4DR SALOON 2.0 TDI 170 SE is a compact executive saloon: a four-door family car sitting above mainstream hatchbacks and alongside used BMW 3 Series and Mercedes-Benz C-Class models. It combines a smart, understated look with a practical boot and room for everyday passengers and luggage. The 170-horsepower diesel suits commuting, longer journeys and family duties, offering stronger pace than basic A4 diesels while remaining a comfortable choice. SE trim brings a good balance of equipment and value. Compared with rivals, the A4 is known for its cabin feel and understated design rather than flashy styling. Mycarcheck.com recorded 252 look-ups covering 134 different VINs, a useful sample; checks show an average private-sale valuation of £1,200, mileage of 145,000 and annual use of 8,000 miles. The average keeper count is about five, so check each car’s history and condition carefully: these figures describe checked examples, not guarantees.