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Audi A4 vs BMW I8: 5-year value retention (48% vs 48%), resale value, and cost of ownership head-to-head. Audi A4 holds its value better.
On five-year value retention the Audi A4 comes out ahead, holding about 48% of its value versus 48% for the BMW I8. Over the first five years the Audi A4 loses roughly $22,272 while the BMW I8 loses about $76,553 — a gap near $54,281.
First-year drop is the biggest factor: the Audi A4 sheds about 21% in year one versus 10% for the BMW I8. If you buy used, the steeper early drop is what the original owner absorbs.