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Audi A4 holds its value better — 48% five-year retention against 48% for the BMW 6-Series. Resale value and cost of ownership, head to head.
On five-year value retention the Audi A4 comes out ahead, holding about 48% of its value versus 48% for the BMW 6-Series. Over the first five years the Audi A4 loses roughly $22,272 while the BMW 6-Series loses about $36,486 — a gap near $14,214.
First-year drop is the biggest factor: the Audi A4 sheds about 21% in year one versus 10% for the BMW 6-Series. If you buy used, the steeper early drop is what the original owner absorbs.