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Audi A6 vs Audi S5-Coupe: 5-year value retention (49% vs 71%), resale value, and cost of ownership head-to-head. Audi S5-Coupe holds its value better.
On five-year value retention the Audi S5-Coupe comes out ahead, holding about 71% of its value versus 49% for the Audi A6. Over the first five years the Audi S5-Coupe loses roughly $16,560 while the Audi A6 loses about $32,499 — a gap near $15,939.
First-year drop is the biggest factor: the Audi S5-Coupe sheds about 6% in year one versus 0% for the Audi A6. If you buy used, the steeper early drop is what the original owner absorbs.