Audi S8

Starting MSRP: $92,000
Five-year cost of ownership: $136,368

Audi is the only brand with vehicles in both the top and bottom 10 for cost of ownership. The large, fast, technology-laden S8 makes the most expensive list mostly because of high depreciation — 68 percent over five years — that substantially erodes a lofty base price. At the other end of the spectrum, the Audi A3 hatchback likewise depreciates rapidly, but a substantially lower purchase price holds down the A3's total ownership costs, making it one of the 10 least costly luxury cars to own.