Kia Carnival SX Prestige vs Toyota Sienna Platinum — 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.Kia Carnival SX Prestige: $88,633 net over 10 years ($4,734/yr running). Toyota Sienna Platinum: $77,981 net over 10 years ($4,043/yr running). Estimates for Cedar Park, TX; every assumption is editable.