Audi A8 L 55 TFSI vs BMW 8 Series 840i xDrive — Cost of OwnershipCompare any two cars on the true 5–10 year cost of ownership: purchase price, fuel or electricity, insurance, maintenance, registration, depreciation and resale value. EV vs gas, lease vs buy, with every assumption editable.Audi A8 L 55 TFSI: $131,272 net over 10 years ($5,476/yr running). BMW 8 Series 840i xDrive: $135,236 net over 10 years ($5,413/yr running). Estimates for Cedar Park, TX; every assumption is editable.