Why buy new? Bag a B9 Audi A4 for less than £20,000

The B9-generation Audi A4, introduced in 2015, is increasingly easy to find for under £20,000—making a compelling alternative to more obvious rivals like the BMW 3 Series and Mercedes-Benz C-Class. Compared with the earlier A4, the B9 gained sharper styling, matrix LED headlights (optional), and a slightly longer, roomier body after moving to Audi’s front-drive MLB Evo platform. Engine choices run from a 148bhp 1.4 TFSI to a 249bhp 2.0-litre Quattro petrol, plus diesel 2.0s and a 268bhp V6. A 2019 facelift brought new LED headlights, a broader grille, virtual cockpit, and reworked diesel outputs as mild hybrids. SE, Sport, S line, and Black Edition trims remain, with some owners reporting dashboard rattles. For buyers who tow or target around 70mpg, the diesel range is central.