Allegro 38BB Cummins 360HP vs King Aire 4521 Spartan 605HP: 5-year value retention (48% vs 47%), resale value, and cost of ownership head-to-head. Allegro 38BB Cummins 360HP holds its value better.
On five-year value retention the Allegro 38BB Cummins 360HP comes out ahead, holding about 48% of its value versus 47% for the King Aire 4521 Spartan 605HP. Over the first five years the Allegro 38BB Cummins 360HP loses roughly $200,652 while the King Aire 4521 Spartan 605HP loses about $968,103 — a gap near $767,451.
First-year drop is the biggest factor: the Allegro 38BB Cummins 360HP sheds about 33% in year one versus 30% for the King Aire 4521 Spartan 605HP. If you buy used, the steeper early drop is what the original owner absorbs.
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