2026 Kia K4 Specs: MPG, Gas Mileage, Engine Size & Dimensions
2026 Kia K4 Specs at a Glance
The 2026 Kia K4 gets 33 mpg combined on the 2.0L Front-Wheel Drive configuration, weighs 3,014 lbs, measures 185.4 in long. Figures are per configuration, not a single official number — other trims rate as low as 28 mpg combined. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.
- Combined MPG
- 33 mpg (29 city / 39 hwy)
- Best configuration: 2.0L · Front-Wheel Drive · Automatic (AV-S1) · other 2026 trims rate 28–33 mpg combined
- Engine
- 2.0L 4-cyl
- 2.0L · Front-Wheel Drive · Automatic (AV-S1) · 2 powertrains offered
- Curb weight
- 3,014 lbs
- Heaviest recorded configuration: K4 HATCH
- Length
- 185.4 in · 72.8 in wide · 55.9 in tall
- Wheelbase
- 107.1 in
2026 Kia K4 trims and MPG
| Trim | Engine | Trans | Drive | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| Auto (AV-S1), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (AV-S1) | Front-Wheel Drive | 29 | 39 | 33 |
| Auto (AV-S1), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (AV-S1) | Front-Wheel Drive | 28 | 34 | 30 |
| Auto (S8), 4 cyl, 1.6 L | 4 · 1.6L | Automatic (S8) | Front-Wheel Drive | 26 | 33 | 28 |
| Auto (S8), 4 cyl, 1.6 L | 4 · 1.6L | Automatic (S8) | Front-Wheel Drive | 26 | 33 | 28 |
Detailed Specifications
MPG & Fuel Economy
MPG for every year and trim
View details →Engine Specifications
Engine Specs for every year and trim
View details →Annual Fuel Cost
Fuel Cost for every year and trim
View details →Transmission Specifications
Transmission for every year and trim
View details →Drivetrain & Drive Type
Drivetrain for every year and trim
View details →Vehicle Class & EPA Size Category
Vehicle Class for every year and trim
View details →Maintenance Schedule & Service Intervals
Maintenance for every year and trim
View details →Dimensions & Size
Dimensions for every year and trim
View details →Curb Weight
Curb Weight for every year and trim
View details →Kia K4 — All Years Overview
| Year | Trim | Engine | Trans | Drive | City | Hwy | Combined | Fuel |
|---|---|---|---|---|---|---|---|---|
| 2026 | Auto (AV-S1), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (AV-S1) | Front-Wheel Drive | 29 | 39 | 33 | Regular Gasoline |
| 2026 | Auto (AV-S1), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (AV-S1) | Front-Wheel Drive | 28 | 34 | 30 | Regular Gasoline |
| 2026 | Auto (S8), 4 cyl, 1.6 L | 4 · 1.6L | Automatic (S8) | Front-Wheel Drive | 26 | 33 | 28 | Regular Gasoline |
| 2026 | Auto (S8), 4 cyl, 1.6 L | 4 · 1.6L | Automatic (S8) | Front-Wheel Drive | 26 | 33 | 28 | Regular Gasoline |
| 2025 | Auto (AV-S1), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (AV-S1) | Front-Wheel Drive | 29 | 39 | 33 | Regular Gasoline |
| 2025 | Auto (AV-S1), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (AV-S1) | Front-Wheel Drive | 30 | 40 | 34 | Regular Gasoline |
| 2025 | Auto (S8), 4 cyl, 1.6 L | 4 · 1.6L | Automatic (S8) | Front-Wheel Drive | 26 | 36 | 29 | Regular Gasoline |
Compare the Kia K4 with rivals
- Kia K4 vs Mercedes-Benz C-Class
- Kia K4 vs Toyota Corolla
- Kia K4 vs Mazda 3
- Kia K4 vs Toyota Camry
- Kia K4 vs MINI John Cooper Works
- Kia K4 vs Lexus IS
- Kia K4 vs Volkswagen Jetta
- Kia K4 vs Volvo S60
- Kia K4 vs Lexus RC
- Kia K4 vs Nissan Altima
- Kia K4 vs MINI Clubman
- Kia K4 vs Nissan Sentra
- Kia K4 vs Subaru WRX
- Kia K4 vs Mitsubishi Mirage
- Kia K4 vs Mercedes-Benz CLS-Class
- Kia K4 vs Nissan Versa
- Kia K4 vs Subaru BRZ
- Kia K4 vs Lexus UX
- Kia K4 vs Mercedes-Benz CLE-Class
- Kia K4 vs Volvo S90
- Kia K4 vs Subaru Legacy
- Kia K4 vs Nissan Kicks
- Kia K4 vs Volkswagen GLI
- Kia K4 vs Volkswagen Arteon
- Kia K4 vs Toyota Prius Prime
- Kia K4 vs Toyota GR 86
- Kia K4 vs Nissan Maxima
- Kia K4 vs Toyota Crown
- Kia K4 vs BMW 4 Series
- Kia K4 vs Ford Mustang
- Kia K4 vs Honda Civic
- Kia K4 vs BMW 3 Series
- Kia K4 vs Dodge Challenger
- Kia K4 vs BMW 2 Series
- Kia K4 vs Hyundai Elantra
- Kia K4 vs BMW 5 Series
- Kia K4 vs Hyundai Sonata
- Kia K4 vs Chevrolet Camaro
- Kia K4 vs Honda Accord
- Kia K4 vs Infiniti Q50
Compare across every brand
All Kia K4 specifications
Kia K4 — Frequently Asked Questions
What is the fuel economy of the 2026 Kia K4?
The Kia K4 is EPA-rated at up to 34 MPG combined (30 city / 40 highway), a historical peak recorded on the 2025 model year.
What engine does the 2026 Kia K4 have?
The Kia K4 uses a 2.0L 4-cylinder engine paired with an Automatic transmission.
What years of the Kia K4 are covered here?
This page documents 7 verified Kia K4 configurations across model years 2025–2026.
Which model year of the Kia K4 is the most fuel efficient?
The 2025 Kia K4 holds the highest combined rating at 34 MPG; the 2026 sits lowest at 33 MPG, a difference of 1 MPG (about 3%) across the 2 rated years on file.
How many engine options does the Kia K4 have?
The records list 2 distinct displacements for the Kia K4 — 1.6L, 2L — which is why combined MPG varies between trims of the same year.
Is the 2026 Kia K4 front-wheel drive or all-wheel drive?
Every Kia K4 configuration on record here is Front-Wheel Drive; no alternative drivetrain appears in the 2025–2026 data.