2026 head-to-head · Midsize Car
2026 Hyundai Elantra vs Kia K4
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 Hyundai Elantra is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $1,329 a year to fuel (35 MPG), versus $1,409 for the 2026 Kia K4 (33 MPG). That's roughly $81 a year, or about $403 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
- Hyundai Elantra
- Kia K4
Side by side
| Hyundai Elantra | Kia K4 | |
|---|---|---|
| $1,329 | Your annual fuel cost | $1,409 |
| 35 MPG | Combined efficiency | 33 MPG |
| 31 MPG | City | 29 MPG |
| 40 MPG | Highway | 39 MPG |
| 99 cu ft | Passenger volume | 99 cu ft |
| 14 cu ft | Cargo volume | 15 cu ft |
| 254 g/mi | Tailpipe CO₂ (g/mi) | 269 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 | 2.0L 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.
Hyundai Elantra vs Kia K4 across model years
- Hyundai Elantra
- Kia K4
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
Per EPA interior volume figures, the Kia K4 has more cargo space (15 vs. 14 cu ft).
Among 31 2026 midsize cars, the Hyundai Elantra ranks 11th and the Kia K4 13th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2026 Hyundai Elantra or the 2026 Kia K4?
Measured by cost to drive, the Hyundai Elantra. The Hyundai Elantra is rated 35 MPG combined and the Kia K4 33 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Hyundai Elantra vs. the Kia K4 per year?
At 15,000 miles a year with $3.10/gal regular gas, about $1,329 for the Hyundai Elantra and $1,409 for the Kia K4.
Which has more cargo space?
The Kia K4, with 15 cu ft of luggage volume versus 14 cu ft (EPA interior volume index).
Hyundai Elantra vs Kia K4 in other years
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