2027 head-to-head · Large Car
2027 Hyundai Sonata 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.
On fuel costs these two are nearly tied. Driving 15,000 miles a year with $3.10/gal regular gas, the most efficient 2027 Hyundai Sonata (31 MPG) costs about $1,500 a year to fuel and the 2027 Kia K5 (30 MPG) about $1,550.
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
- Kia K5
Side by side
| Hyundai Sonata | Kia K5 | |
|---|---|---|
| $1,500 | Your annual fuel cost | $1,550 |
| 31 MPG | Combined efficiency | 30 MPG |
| 26 MPG | City | 26 MPG |
| 38 MPG | Highway | 37 MPG |
| 104 cu ft | Passenger volume | 105 cu ft |
| 16 cu ft | Cargo volume | 16 cu ft |
| 290 g/mi | Tailpipe CO₂ (g/mi) | 296 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 |
| 2.5L 4-cyl | Engine / motor | 2.5L 4-cyl |
| 8-speed automatic | 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 vs Kia K5 across model years
- Hyundai Sonata
- 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 16 2027 large cars, the Hyundai Sonata ranks 7th and the Kia K5 8th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2027 Hyundai Sonata or the 2027 Kia K5?
Measured by cost to drive, the Hyundai Sonata. The Hyundai Sonata is rated 31 MPG combined and the Kia K5 30 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 Hyundai Sonata vs. the Kia K5 per year?
At 15,000 miles a year with $3.10/gal regular gas, about $1,500 for the Hyundai Sonata and $1,550 for the Kia K5.
Hyundai Sonata vs Kia K5 in other years
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