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Porsche 718 Boxster vs Porsche 718 Cayman: 5-year value retention (86% vs 90%), resale value, and cost of ownership head-to-head. Porsche 718 Cayman holds its value better.
On five-year value retention the Porsche 718 Cayman comes out ahead, holding about 90% of its value versus 86% for the Porsche 718 Boxster. Over the first five years the Porsche 718 Cayman loses roughly $7,540 while the Porsche 718 Boxster loses about $11,175 — a gap near $3,635.
First-year drop is the biggest factor: the Porsche 718 Cayman sheds about 0% in year one versus 0% for the Porsche 718 Boxster. If you buy used, the steeper early drop is what the original owner absorbs.