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Audi A5-Cabriolet vs Audi RS-Q8: 5-year value retention (62% vs 62%), resale value, and cost of ownership head-to-head. Audi A5-Cabriolet holds its value better.
On five-year value retention the Audi A5-Cabriolet comes out ahead, holding about 62% of its value versus 62% for the Audi RS-Q8. Over the first five years the Audi A5-Cabriolet loses roughly $21,017 while the Audi RS-Q8 loses about $52,278 — a gap near $31,261.
First-year drop is the biggest factor: the Audi A5-Cabriolet sheds about 9% in year one versus 0% for the Audi RS-Q8. If you buy used, the steeper early drop is what the original owner absorbs.