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Buick Regal Tourx holds its value better — 64% five-year retention against 64% for the Chevrolet Sonic. Resale value and cost of ownership, head to head.
On five-year value retention the Buick Regal Tourx comes out ahead, holding about 64% of its value versus 64% for the Chevrolet Sonic. Over the first five years the Buick Regal Tourx loses roughly $10,603 while the Chevrolet Sonic loses about $6,070 — a gap near $-4533.
First-year drop is the biggest factor: the Buick Regal Tourx sheds about 7% in year one versus 7% for the Chevrolet Sonic. If you buy used, the steeper early drop is what the original owner absorbs.