Allegro 45OPP Powerglide 605HP vs Thor Motor Coach GR22 GM 3500: 5-year value retention (58% vs 58%), resale value, and cost of ownership head-to-head. Allegro 45OPP Powerglide 605HP holds its value better.
On five-year value retention the Allegro 45OPP Powerglide 605HP comes out ahead, holding about 58% of its value versus 58% for the Thor Motor Coach GR22 GM 3500. Over the first five years the Allegro 45OPP Powerglide 605HP loses roughly $291,646 while the Thor Motor Coach GR22 GM 3500 loses about $42,091 — a gap near $-249555.
First-year drop is the biggest factor: the Allegro 45OPP Powerglide 605HP sheds about 14% in year one versus 8% for the Thor Motor Coach GR22 GM 3500. If you buy used, the steeper early drop is what the original owner absorbs.
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