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Audi RS-5 vs Audi RS-Q8: 5-year value retention (62% vs 57%), resale value, and cost of ownership head-to-head. Audi RS-5 holds its value better.
On five-year value retention the Audi RS-5 comes out ahead, holding about 62% of its value versus 57% for the Audi RS-Q8. Over the first five years the Audi RS-5 loses roughly $29,850 while the Audi RS-Q8 loses about $54,481 — a gap near $24,631.
First-year drop is the biggest factor: the Audi RS-5 sheds about 11% in year one versus 12% for the Audi RS-Q8. If you buy used, the steeper early drop is what the original owner absorbs.