2026 head-to-head · Large Car
2026 Hyundai Sonata Hybrid vs Kia K5
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 Sonata Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $912 a year to fuel (51 MPG), versus $1,550 for the 2026 Kia K5 (30 MPG). That's roughly $638 a year, or about $3,191 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 Sonata Hybrid
- Kia K5
Side by side
| Hyundai Sonata Hybrid | Kia K5 | |
|---|---|---|
| $912 | Your annual fuel cost | $1,550 |
| 51 MPG | Combined efficiency | 30 MPG |
| 47 MPG | City | 26 MPG |
| 56 MPG | Highway | 37 MPG |
| 104 cu ft | Passenger volume | 105 cu ft |
| 16 cu ft | Cargo volume | 16 cu ft |
| 175 g/mi | Tailpipe CO₂ (g/mi) | 298 g/mi |
| 8/10 | EPA fuel economy score | 6/10 |
| 8/10 | EPA greenhouse gas score | 6/10 |
| Hybrid | Powertrain | Gas |
| Regular gasoline | Fuel | Regular gasoline |
| 2.0L 4-cyl | Engine / motor | 2.5L 4-cyl |
| 6-speed dual-clutch | Transmission | 8-speed automatic |
| 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 Sonata Hybrid vs Kia K5 across model years
- Hyundai Sonata Hybrid
- Kia K5
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 24 2026 large cars, the Hyundai Sonata Hybrid ranks 3rd and the Kia K5 10th for lowest fuel cost.
The powertrains differ: the Hyundai Sonata Hybrid is a full hybrid, while the Kia K5 is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2026 Hyundai Sonata Hybrid or the 2026 Kia K5?
Measured by cost to drive, the Hyundai Sonata Hybrid. The Hyundai Sonata Hybrid is rated 51 MPG combined and the Kia K5 30 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Hyundai Sonata Hybrid vs. the Kia K5 per year?
At 15,000 miles a year with $3.10/gal regular gas, about $912 for the Hyundai Sonata Hybrid and $1,550 for the Kia K5.
Hyundai Sonata Hybrid vs Kia K5 in other years
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