2025 Kia K4 (2L 4-cyl) MPG & Specs
Quick answer
The 2025 Kia K4 gets an EPA-estimated 29/39 MPG (city/highway) and 33 MPG combined, with an estimated $1,850/year fuel cost and 273 g/mi CO₂. Engine: 2 L 4-cyl.
The 2025 Kia K4 with the 2-liter 4-cylinder regular gasoline engine returns an EPA-estimated 29 MPG in the city and 39 MPG on the highway, for a combined 33 MPG. This page summarizes the official EPA fuel-economy and emissions data for this configuration.
| Engine | 2 L 4-cyl |
| Transmission | Automatic (AV-S1) |
| Drive | Front-Wheel Drive |
| Fuel type | Regular Gasoline |
| Vehicle class | Midsize Cars |
| MPG — city | 29 |
| MPG — highway | 39 |
| MPG — combined | 33 |
| Annual fuel cost* | $1,850 |
| CO₂ tailpipe | 273 g/mi |
| EPA GHG score | 6/10 |
How efficient is it?
With a combined 33 MPG, the 2025 Kia K4 sits in the good range for fuel economy. That is about 29% better than the typical Midsize Cars of its era (26 MPG class average), making it one of the more efficient choices in its class.
Fuel economy and running costs
At about $1,850 per year in fuel (EPA estimate, 15,000 mi/yr), fuel is a major part of the cost of owning the 2025 Kia K4. Over five years that is roughly $9,250 at today's prices — before insurance, maintenance, and depreciation.
Emissions
The 2025 Kia K4 emits approximately 273 grams of CO₂ per mile at the tailpipe, earning an EPA greenhouse-gas score of 6 out of 10. Lower emissions generally track higher fuel economy.
How to read these numbers
EPA figures come from standardized laboratory test cycles and are the same estimates shown on the vehicle's window sticker. Your real-world mileage depends on driving style, conditions, fuel grade, and maintenance. Use combined MPG and annual fuel cost to compare vehicles fairly.