The 2026 Kia K4 gives shoppers efficient everyday power with an available turbocharged upgrade. Most trims use a 2.0-liter 4-cylinder engine rated at 147 horsepower at 6,200 rpm and 132 lb-ft of torque at 4,500 rpm. Kia pairs that engine with an Intelligent Variable Transmission, and EPA estimates list 29 mpg city, 39 mpg highway, and 33 mpg combined.

Drivers who want stronger acceleration can look for the 2026 Kia K4 GT-Line Turbo. It uses a turbocharged 1.6-liter 4-cylinder engine rated at 190 horsepower at 6,000 rpm and 195 lb-ft of torque from 1,700 to 4,500 rpm. Kia pairs that turbo engine with an 8-speed automatic transmission, while Drive Mode Select adds Normal and Sport settings.

• 2.0-liter 4-cylinder engine with 147 horsepower at 6,200 rpm
• 132 lb-ft of torque at 4,500 rpm on 2.0-liter models
• Available turbocharged 1.6-liter 4-cylinder engine with 190 horsepower
• Available 195 lb-ft of torque from 1,700 to 4,500 rpm
• Intelligent Variable Transmission or available 8-speed automatic transmission

The 2026 Kia K4 is designed with driver assistance technology that supports awareness during everyday driving. Kia lists Forward Collision-Avoidance Assist with pedestrian, cyclist, and junction turning detection, while available Forward Collision-Avoidance Assist 2 adds junction crossing, direct oncoming, lane change, and evasive steering assist functions.

The 2026 Kia K4 also offers systems for lane changes, parking, and reversing. Available Blind-Spot Collision-Avoidance Assist can help detect vehicles or powered two-wheelers in the blind spot, while available 360-degree Surround View Monitor uses four wide-view cameras. Rear Cross-Traffic Collision-Avoidance Assist, Lane Keeping Assist, Lane Following Assist, and Smart Cruise Control with Stop and Go are also listed.

• Forward Collision-Avoidance Assist with pedestrian, cyclist, and junction turning detection
• Available Forward Collision-Avoidance Assist 2
• Available Blind-Spot Collision-Avoidance Assist
• Available 360-degree Surround View Monitor with four wide-view cameras
• Rear Cross-Traffic Collision-Avoidance Assist

The 2026 Kia K4 puts useful technology close to the driver. A 12.3-inch touchscreen display is listed for audio control, and an available 12.3-inch touchscreen with navigation provides a wide view for navigation, diagnostics, convenience, entertainment, and vehicle information. An available 12.3-inch instrument display adds a modern digital gauge layout.

Connectivity is a strong part of the 2026 Kia K4 experience. Wireless Apple CarPlay and wireless Android Auto are listed, so compatible smartphone features can be used without a cable. The 2026 Kia K4 also offers Over-the-Air system updates, available wireless phone charging, four USB ports, Bluetooth multi-device connectivity, and an available Harman Kardon audio system with eight speakers.

• 12.3-inch touchscreen display
• Available 12.3-inch touchscreen display with navigation
• Available 12.3-inch instrument display
• Wireless Apple CarPlay and wireless Android Auto
• Over-the-Air system update capability

The 2026 Kia K4 cabin is built to feel open for a compact sedan. Kia lists 42.3 inches of front legroom and 38.0 inches of rear legroom, giving passengers useful stretch-out space. Trunk volume measures 14.6 cubic feet, and 60/40 split-folding rear seats help the 2026 Kia K4 handle longer cargo.

Comfort options make the 2026 Kia K4 feel more refined. Depending on trim and package, shoppers can find heated front seats, available ventilated front seats, an available 10-way power-adjustable driver seat with 2-way lumbar adjustment, dual-zone automatic climate control, multicolor ambient mood lighting, and an available wide sunroof.

• 42.3 inches of front legroom
• 38.0 inches of rear legroom
• 14.6 cubic feet of trunk volume
• 60/40 split-folding rear seats
• Available 10-way power-adjustable driver seat with 2-way lumbar adjustment

The 2026 Kia K4 has a sleek sedan shape with dimensions that support a confident stance. Kia lists the 2026 Kia K4 at 185.4 inches long, 72.8 inches wide, 55.9 inches tall, and 107.1 inches in wheelbase. Ground clearance is listed at 5.3 inches for a low, planted profile.

Exterior details vary by trim, but the 2026 Kia K4 offers 16-inch steel wheels, 16-inch alloy wheels, 17-inch alloy wheels, and 18-inch alloy wheels depending on configuration. Lighting options include LED headlights, LED fog lights, LED taillights, amber LED daytime running lights, and High Beam Assist.

• 185.4-inch overall length
• 72.8-inch width
• 55.9-inch height
• 107.1-inch wheelbase
• 5.3 inches of ground clearance