2026 Kia K4 vs. Kia K5 Comparison in Auburn Hills, MI
The 2026 Kia K4 and the 2026 Kia K5 each bring their own distinct character to Kia's sedan lineup, sharing the brand's commitment to refinement and value while offering different takes on size, style, and feature content. The two sedans share a list of similarities, including available turbocharged power, a 12.3-inch infotainment touchscreen, and a strong roster of standard driver assistance features. Use this 2026 Kia K4 vs. 2026 Kia K5 comparison from the team at Summit Place Kia to see how the compact K4 and the mid-size K5 sedans match up across exterior styling, engine performance, interior space, and safety technology. For more on each model, view our Kia K4 trims guide or our Kia K5 trims guide.
When you're ready to see either sedan in person, browse our inventory to see which of the 2026 Kia K4 and 2026 Kia K5 models are available at our Kia dealership in Auburn Hills, MI. Then you can also schedule a test drive or take a look at our current lease offers. If you have any questions, contact us online or by calling us at (248) 682-6002.
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2026 Kia K4 vs. Kia K5 Exterior Design
The 2026 Kia K4 and the 2026 Kia K5 are sedans with modern styling and full LED exterior lighting. Both models offer an available GT-Line styling treatment with gloss black exterior accents and distinct wheel finishes. Alloy wheels are standard on the K5 base trim, while the K4 base trim offers standard steel wheels and available alloy wheels. For top-trim exterior touches, the K5 lineup includes a GT model with quad exhaust tips, while the K4 GT-Line Turbo offers small cube LED projector headlights and full LED combination taillights.
Shared available exterior features:
- 16- or 18-in. wheels
- GT-Line body styling
- Multi-reflector LED headlights with auto control
- Amber LED daytime running lights
- LED taillights and fog lights
- Heated, power-adjustable side view mirrors
- Side view mirror-integrated LED turn signals
- Smart trunk
Available 2026 Kia K4 exterior features:
- 17-in. wheels
- Small cube LED projector headlights
- Full LED combination taillights
Available 2026 Kia K5 exterior features:
- 19-in. wheels
- Gloss black exterior details
- Illuminated door handles
- Dual exhaust tips or dual exhaust with quad tips
- Power-folding side view mirrors
2026 Kia K4
2026 Kia K5
2026 Kia K4 vs. Kia K5 Interior Design & Technology
The 2026 Kia K4 and the 2026 Kia K5 both offer comfortable five-passenger cabins with cloth upholstery on base trims and SynTex upholstery available on higher-end trims. Heated and ventilated front seats and a heated steering wheel are available on each model. Brighten the cabins with an available sunroof with sunshade in both models. The K5 EX features a 10-way power front passenger's seat, which is not available on the K4.
Both sedans feature a 12.3-inch infotainment touchscreen. The K4 offers an available Harman Kardon® eight-speaker setup, while the K5 offers a 12-speaker Bose® premium audio system. Wireless phone charging, a 12.3-inch digital instrument cluster, and navigation are also available on higher trims of either sedan.
Shared available interior features:
- Cloth or SynTex seat upholstery
- Six-way manual front seats
- Ten-way power driver's seat with two-way power lumbar
- Memory settings for driver's seat and side view mirrors
- Heated and ventilated front seats
- Heated flat-bottom sport steering wheel with paddle shifters
- LED interior lighting
- Dual-zone automatic climate control
- Smart key
- Remote start
Available 2026 Kia K4 interior features:
- Wide sunroof with power sunshade
- 60/40 split-folding rear seats with center armrest
- Alloy sport pedals
- Multicolor ambient mood lighting
Available 2026 Kia K5 interior features:
- Panoramic sunroof with power sunshade
- Ten-way power front seats with two-way power lumbar
- Leather-wrapped steering wheel
- Rear air vents
Shared available technology features:
- 12.3-in. infotainment touchscreen
- Wireless Apple CarPlay and Android Auto
- Bluetooth®
- SiriusXM® Satellite Radio capability
- Navigation
- Wireless phone charger
- Front and rear USB-C ports
- Front 12V power port
- Kia Connect capability
Available 2026 Kia K4 technology features:
- 4-in. or 12.3-in. instrument panel display
- Four or six speakers, or Harman Kardon® eight-speaker audio system
- HD Radio™
- Kia AI assistant
Available 2026 Kia K5 technology features:
- 4.2-in. or 12.3-in. curved instrument cluster display
- Six speakers or 12-speaker Bose premium audio system
- Active sound design
- Digital Key 2.0
2026 Kia K4 vs. Kia K5 Engine Specs & Fuel Economy
For powertrain options, the 2026 Kia K4 and the 2026 Kia K5 each offer a standard engine and an available turbocharged engine. The K4 lineup features a standard 2.0L inline four-cylinder (I4) engine and an available 1.6L turbo I4 engine. A 2.5L I4 engine is standard on select K5 trims, while the 2.5L turbo I4 is standard on higher-end K5 trims. Front-wheel drive (FWD) is standard across both lineups, while the K5 also offers all-wheel drive (AWD) on the GT-Line AWD trim.
View the following engine specifications for more details.
| 2026 Kia K4 | Model | 2026 Kia K5 | ||
|---|---|---|---|---|
| 2.0L I4 (standard) | 1.6L turbo I4 (available) | Engines | 2.5L I4 (standard) | 2.5L turbo I4 (available) |
| 147 HP | 190 HP | Horsepower | 191 HP | 290 HP |
| 132 lb.-ft. | 195 lb.-ft. | Torque | 181 lb.-ft. | 311 lb.-ft. |
| FWD | Drivetrain | FWD / AWD | FWD | |
| Intelligent variable | Eight-speed automatic | Transmission | Eight-speed automatic | Eight-speed wet-type dual clutch |
| 29 / 39 | 26 / 33 | MPG (City/Hwy) | 26 / 37 | 23 / 33 |
2026 Kia K4 vs. Kia K5 Size & Cargo Space
Both the 2026 Kia K4 and the 2026 Kia K5 are five-passenger sedans. Everyone can stretch out in both models with 38 inches of rear legroom in the K4 and more than 35 inches in the K5. Trunk volume also favors the K5 at 15.6 cubic feet versus 14.6 cubic feet in the K4.
View the following dimensions for more details.
| 2026 Kia K4 | Model | 2026 Kia K5 |
|---|---|---|
| Five | Seating Capacity | Five |
| 185.4 in. | Overall Length | 193.1 in. |
| 107.1 in. | Wheelbase | 112.2 in. |
| 72.8 in. | Width | 73.2 in. |
| 55.9 in. | Height | 56.9 in. |
| 42.3 / 38 in. | Legroom (Front/Rear) | 46.1 / 35.2 in. |
| 39 / 37.3 in. | Headroom (Front/Rear) Without Sunroof | 40.2 / 37.8 in. |
| 37.1 / 37.2 in. | Headroom (Front/Rear) With Sunroof | 38.4 / 37.4 in. |
| 14.6 cu.-ft. | Trunk Volume | 15.6 cu.-ft. |
2026 Kia K4
2026 Kia K5
2026 Kia K4 vs. Kia K5 Safety Options & Features
Both the 2026 Kia K4 and the 2026 Kia K5 come standard with a suite of driver assistance features, covering collision avoidance, lane assistance, and adaptive cruise control. The K5 includes blind spot collision avoidance assist as standard equipment, while on the K4, blind spot collision warning with parallel exit is available but not standard across the lineup. Both sedans offer Highway Driving Assist and 360-degree camera coverage on higher trims, and the K4 GT-Line Turbo is available with Highway Driving Assist 2, which provides enhanced steering and adaptive cruise control support during extended highway drives.
Available shared safety features:
- Forward Collision Avoidance Assist with pedestrian, cyclist, and junction turning detection
- Highway Driving Assist
- Adaptive cruise control with stop and go
- Navigation-based smart cruise control with stop and go - curve
- Lane keeping and following assist
- Blind spot collision avoidance assist
- Blind spot view monitor
- Rear cross-traffic collision avoidance assist
- 360-degree surround view monitor
- Rearview monitor
- Reverse parking collision avoidance assist
- Front, rear, and side parking sensors
- Driver attention warning
- High beam assist
- Rear occupant alert
Available 2026 Kia K4 safety features:
- Highway Driving Assist 2
- Adaptive cruise control with stop and go
- Navigation-based smart cruise control with stop and go - curve
- Lane keeping and following assist
- Driver-initiated lane change assist
- Low-speed cut-in distance management
- In-lane offset positioning
- Forward Collision Avoidance Assist 2 with pedestrian, cyclist, junction turning, junction crossing, direct oncoming, lane change oncoming, lane change side, and evasive steering assist detection
- Blind spot collision warning with parallel exit
- Driver attention warning
- Safe exit warning
Available 2026 Kia K5 safety features:
- Lane departure warning
- Driver attention warning with leading vehicle departure alert
- Safe exit assist
Which Kia Sedan Is Right for You?
The 2026 Kia K4 has a strong fuel economy, a sporty profile, and generous rear legroom, making it a fitting choice if you prioritize efficiency and a compact footprint for city streets in Auburn Hills, Pontiac, or Detroit. The 2026 Kia K5 features a spacious cabin, an available AWD system for traction in Michigan winters, and a 290-horsepower turbocharged GT trim if performance is your focus. Either sedan brings a 12.3-inch infotainment touchscreen, wireless Apple CarPlay and Android Auto, and a strong set of standard driver assistance features.
Test Drive the New Kia Sedan Lineup at Summit Place Kia
You'll find your next sedan at Summit Place Kia in Auburn Hills, MI, where the 2026 Kia K4 and the 2026 Kia K5 are both available in our inventory. Once you have a model in mind, schedule a test drive to get behind the wheel. Our current lease offers can help fit either sedan into your budget, and you can contact us online or by phone at (248) 682-6002 with any questions.