Kia K900 vs. Kia Optima

iSeeCars' unbiased and data-driven comparison of the Kia K900 and Kia Optima contrasts the two cars across a broad spectrum of vehicle specifications to determine which car is better. In addition to comparing pricing and specs, iSeeCars uses all the ratings, rankings, and insights from its comprehensive analyses of each vehicle model, including calculations of reliability, safety, depreciation, value retention, and the vehicle's projected lifetime recalls (based on analyzing over 25 billion data points). This in-depth evaluation is used to identify which vehicle represents a better overall choice for shoppers who are considering both the Kia K900 and the Kia Optima.

When we compare the Kia K900's and the Kia Optima's specifications and ratings, the Kia K900 has the advantage in the areas of interior volume and base engine power. The Kia Optima has the advantage in the areas of typical lower range of pricing for one- to five-year-old used cars, and fuel efficiency, reliability, resale value and overall quality score. Based on this comparison of the Kia K900's and the Kia Optima's specifications and ratings, the Kia Optima is a better car than the Kia K900.

Pricing: A used 2020 Kia K900 ranges from $27,213 to $38,994 while a used 2020 Kia Optima is priced between $13,949 to $22,944.

Resale/Retained Value: Looking at the 5-year depreciation rate for both models, the Kia K900 loses 46.5 percent of its value and the Kia Optima loses 43.1 percent of its value. This means the Kia Optima retains 3.3 percentage points more of its value and has the advantage of higher resale value versus the Kia K900.

Quality Rating: The iSeeCars Overall Quality rating for the Kia K900 is 7.6 out of 10 while the Kia Optima's quality rating is 8.6 out of 10. This results in the Kia K900 being ranked 7 out of 8 Best Large Cars and the Kia Optima being ranked 7 out of 13 Best Midsize Cars.

Reliability Rating: iSeeCars’ Reliability Rating for the Kia K900 is 7.5 out of 10. For the Kia Optima the reliability rating is 7.8 out of 10. This gives the Kia Optima a slight advantage in reliability compared to the Kia K900.

Engine Power and Fuel Efficiency Comparison: For engine performance, the Kia K900’s base engine makes 365 horsepower, and the Kia Optima base engine makes 185 horsepower. The K900 is rated to deliver an average of 21 miles per gallon, with a highway range of 508 miles. The Optima is rated to deliver an average of 27 miles per gallon, with a highway range of 592 miles. This gives the Kia Optima the fuel efficiency and maximum range advantage over the Kia K900. The K900 uses premium unleaded, and the Optima uses regular unleaded.

Passenger Space Comparison: The Kia K900, a large car, has the advantage of offering more interior volume, reflected in more front head room, front shoulder room, front leg room, rear head room, rear shoulder room and rear leg room. The Kia Optima, a midsize car, has the advantage in the area of cargo space.

Safety Ratings: The Kia Optima has an average safety rating of 5 out of 5 Stars based on NHTSA's crash test ratings.