2026 head-to-head · Midsize Car
2026 Kia K4 vs Nissan Altima
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2026 Kia K4 is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $1,409 a year to fuel (33 MPG), versus $1,550 for the 2026 Nissan Altima (30 MPG). That's roughly $141 a year, or about $705 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Kia K4
- Nissan Altima
Side by side
| Kia K4 | Nissan Altima | |
|---|---|---|
| $1,409 | Your annual fuel cost | $1,550 |
| 33 MPG | Combined efficiency | 30 MPG |
| 29 MPG | City | 26 MPG |
| 39 MPG | Highway | 36 MPG |
| 99 cu ft | Passenger volume | 101 cu ft |
| 15 cu ft | Cargo volume | 15 cu ft |
| 269 g/mi | Tailpipe CO₂ (g/mi) | 297 g/mi |
| 6/10 | EPA fuel economy score | 6/10 |
| 6/10 | EPA greenhouse gas score | 6/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Regular gasoline |
| 2.0L 4-cyl | Engine / motor | 2.5L 4-cyl |
| CVT | Transmission | CVT |
| FWD | Drivetrain | FWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Kia K4 vs Nissan Altima across model years
- Kia K4
- Nissan Altima
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Among 31 2026 midsize cars, the Kia K4 ranks 13th and the Nissan Altima 14th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2026 Kia K4 or the 2026 Nissan Altima?
Measured by cost to drive, the Kia K4. The Kia K4 is rated 33 MPG combined and the Nissan Altima 30 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Kia K4 vs. the Nissan Altima per year?
At 15,000 miles a year with $3.10/gal regular gas, about $1,409 for the Kia K4 and $1,550 for the Nissan Altima.
Kia K4 vs Nissan Altima in other years
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