Porsche Cayenne S vs Rivian R1S Tri Motor — 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.Porsche Cayenne S: $141,872 net over 10 years ($6,155/yr running). Rivian R1S Tri Motor: $143,820 net over 10 years ($4,585/yr running). Estimates for Cedar Park, TX; every assumption is editable.