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Audi S7 vs BMW 8-Series: 5-year value retention (53% vs 46%), resale value, and cost of ownership head-to-head. Audi S7 holds its value better.
On five-year value retention the Audi S7 comes out ahead, holding about 53% of its value versus 46% for the BMW 8-Series. Over the first five years the Audi S7 loses roughly $40,108 while the BMW 8-Series loses about $50,652 — a gap near $10,544.
First-year drop is the biggest factor: the Audi S7 sheds about 3% in year one versus 1% for the BMW 8-Series. If you buy used, the steeper early drop is what the original owner absorbs.