Thunderbird Formula 290 BR vs Thunderbird Formula 31 PC: 5-year value retention (55% vs 55%), resale value, and cost of ownership head-to-head. Thunderbird Formula 290 BR holds its value better.
On five-year value retention the Thunderbird Formula 290 BR comes out ahead, holding about 55% of its value versus 55% for the Thunderbird Formula 31 PC. Over the first five years the Thunderbird Formula 290 BR loses roughly $160,424 while the Thunderbird Formula 31 PC loses about $205,651 — a gap near $45,227.
First-year drop is the biggest factor: the Thunderbird Formula 290 BR sheds about 36% in year one versus 9% for the Thunderbird Formula 31 PC. If you buy used, the steeper early drop is what the original owner absorbs.
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