Allegro 35CP Powerglide 450HP vs Allegro 40IP Powerglide 450HP: 5-year value retention (58% vs 58%), resale value, and cost of ownership head-to-head. Allegro 35CP Powerglide 450HP holds its value better.
On five-year value retention the Allegro 35CP Powerglide 450HP comes out ahead, holding about 58% of its value versus 58% for the Allegro 40IP Powerglide 450HP. Over the first five years the Allegro 35CP Powerglide 450HP loses roughly $256,378 while the Allegro 40IP Powerglide 450HP loses about $295,357 — a gap near $38,979.
First-year drop is the biggest factor: the Allegro 35CP Powerglide 450HP sheds about 20% in year one versus 20% for the Allegro 40IP Powerglide 450HP. If you buy used, the steeper early drop is what the original owner absorbs.
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