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Audi S3 vs Cadillac CT5: 5-year value retention (68% vs 69%), resale value, and cost of ownership head-to-head. Cadillac CT5 holds its value better.
On five-year value retention the Cadillac CT5 comes out ahead, holding about 69% of its value versus 68% for the Audi S3. Over the first five years the Cadillac CT5 loses roughly $15,203 while the Audi S3 loses about $16,589 — a gap near $1,386.
First-year drop is the biggest factor: the Cadillac CT5 sheds about 4% in year one versus 0% for the Audi S3. If you buy used, the steeper early drop is what the original owner absorbs.