2025 · Midsize Car · Gas
2025 Kia K4 MPG & fuel economy
The 2025 Kia K4 is a midsize car offered in 3 EPA-rated configurations. The most efficient version returns 34 MPG combined (30 city / 40 highway) on regular gasoline. Across the lineup, combined ratings range from 29 to 34 MPG. Among 42 midsize cars rated for 2025, it ranks 15th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $1,368 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2025 Kia K4's fuel average is 14.5 km/L (6.9 L/100 km), or 34 MPG combined: 12.8 km/L in the city and 17.0 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 30 | 12.8 | 7.8 |
| Highway | 40 | 17.0 | 5.9 |
| Combined | 34 | 14.5 | 6.9 |
How it ranks among 2025 Midsize Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
K4 MPG across model years
Full history →3 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 2.0L 4-cyl · CVT K4 |
Gas | 30 MPG | 40 MPG | 34 MPG | — | $1,368 |
| FWD · 2.0L 4-cyl · CVT K4 |
Gas | 29 MPG | 39 MPG | 33 MPG | — | $1,409 |
| FWD · 1.6L 4-cyl turbo · 8-speed automatic K4 |
Gas | 26 MPG | 36 MPG | 29 MPG | — | $1,603 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 2.0L 4-cyl
- Transmission
- CVT
- Drivetrain
- FWD
- Passenger volume
- 99 cu ft
- Cargo volume
- 14 cu ft
- Tailpipe CO₂
- 264 g/mi
- EPA fuel economy score
- 7/10
- EPA greenhouse gas score
- 7/10
2025 Kia K4 vs. rivals
Compare the 2025 K4
With any other car from any year, including other K4 model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2025 Kia K4?
Up to 34 MPG combined (30 city / 40 highway); ratings range from 29 to 34 MPG depending on configuration.
What fuel does the 2025 Kia K4 use?
Regular gasoline.
What is the fuel average in km/L for the 2025 Kia K4?
The 2025 Kia K4's fuel average is 14.5 km/L (6.9 L/100 km), or 34 MPG combined: 12.8 km/L in the city and 17.0 km/L on the highway.
How much does it cost to fuel the 2025 Kia K4 per year?
About $1,368 at 15,000 miles a year with $3.10/gal regular gas, or $9.12 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.