Thor Motor Coach 20A Promaster Roof TOP vs Thor Motor Coach 20J Promaster: 5-year value retention (64% vs 64%), resale value, and cost of ownership head-to-head. Thor Motor Coach 20A Promaster Roof TOP holds its value better.
On five-year value retention the Thor Motor Coach 20A Promaster Roof TOP comes out ahead, holding about 64% of its value versus 64% for the Thor Motor Coach 20J Promaster. Over the first five years the Thor Motor Coach 20A Promaster Roof TOP loses roughly $57,713 while the Thor Motor Coach 20J Promaster loses about $55,928 — a gap near $-1785.
First-year drop is the biggest factor: the Thor Motor Coach 20A Promaster Roof TOP sheds about 28% in year one versus 28% for the Thor Motor Coach 20J Promaster. If you buy used, the steeper early drop is what the original owner absorbs.
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