Deep Impact Custom 399 Sport vs Triumph Thruxton RS: 5-year value retention (71% vs 71%), resale value, and cost of ownership head-to-head. Deep Impact Custom 399 Sport holds its value better.
On five-year value retention the Deep Impact Custom 399 Sport comes out ahead, holding about 71% of its value versus 71% for the Triumph Thruxton RS. Over the first five years the Deep Impact Custom 399 Sport loses roughly $189,773 while the Triumph Thruxton RS loses about $4,963 — a gap near $-184810.
First-year drop is the biggest factor: the Deep Impact Custom 399 Sport sheds about 6% in year one versus 8% for the Triumph Thruxton RS. If you buy used, the steeper early drop is what the original owner absorbs.
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