2018 Kia Optima vs 2018 Kia Rio
| EPA figure | 2018 Kia Optima | 2018 Kia Rio |
|---|---|---|
| Model year | 2018 | 2018 |
| Body · drive | Large · Front-Wheel Drive · Gas | Compact · Front-Wheel Drive · Gas |
| Combined MPG | 28 | 32 |
| City / highway MPG | 24 / 34 | 28 / 37 |
| Fuel a year | $2,400 | $2,100 |
| Tailpipe CO₂ (g/mi) | 321 | 280 |
| Engine | 2.4 L 4-cyl | 1.6 L 4-cyl |
| Transmission | Automatic (S6) | Automatic (S6) |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.