2026 Kia K4 Vs. K5

The 2026 Kia K4 and Kia K5 are two fuel-efficient sedans that offer the performance and modern features drivers throughout San Jose and the surrounding areas want. If you are looking to upgrade your sedan, take a moment to review our 2026 Kia K4 vs. Kia K5 comparison. We compare these vehicles in terms of cargo space, performance, interior features, and more. If either sedan appeals to your driving needs, contact Capitol Kia to schedule a test drive. Our team in San Jose is also here to answer your questions and provide you with a seamless buying experience! 

2026 Kia K4 Vs. Kia K5 Specs: Performance

Performance is one of the clearest ways to differentiate these two sedans. The Kia K5 delivers more power across the board and even offers a high-performance GT trim, while the K4 delivers refined handling and solid efficiency for everyday commuting. If you’re driving through Santa Clara and looking for extra power on the highway, the K5 might have the edge—but the K4 is nimble and confident around town.

2026 Kia K4 Engine Options

• 2.0L 4-Cylinder Engine: Capable of up to 147 hp and 132 lb-ft of torque
• 1.6L Turbocharged 4-Cylinder Engine: Capable of up to 190 hp and 195 lb-ft of torque

2026 Kia K5 Engine Options

• 2.5L 4-Cylinder Engine: Capable of up to 191 hp and 181 lb-ft of torque
• 2.5L Turbocharged 4-Cylinder Engine: Capable of up to 290 hp and 311 lb-ft of torque

2026 Kia K4 Vs. Kia K5 Interior: Seating & Cargo Space

Both models comfortably seat five passengers and offer spacious, well-designed interiors. The K5, being a midsize model, naturally offers more rear legroom and trunk space, while the K4 provides a more compact footprint ideal for city driving. In Sunnyvale, choosing between the two may come down to how much rear seat space or cargo capacity you need on a daily basis.

2026 Kia K4 Interior Dimensions

• Seating capacity: 5
• Headroom w/o sunroof (front/rear): 39.0 inches / 37.3 inches
• Headroom w/ sunroof (front/rear): 37.1 inches / 37.2 inches
• Shoulder room (front/rear): 56.5 inches / 54.7 inches
• Hip room (front/rear): 53.3 inches / 51.9 inches
• Legroom (front/rear): 42.3 inches / 38.0 inches
• SAE trunk volume: 14.6 cubic feet

2026 Kia K5 Interior Dimensions

• Seating capacity: 5
• Headroom (first/second row), with Panoramic Sunroof: 38.4 inches / 37.4 inches
• Headroom (first/second row), without Panoramic Sunroof: 40.2 inches / 37.8 inches
• Shoulder room (first/second row): 58.0 inches / 56.1 inches
• Hip room (first/second row): 56.6 inches / 56.6 inches
• Legroom (first/second row): 46.1 inches / 35.2 inches
• SAE trunk volume: 15.6 cubic feet

2026 Kia K5 Vs. K4: Technology & Features

Technology is a strong point for both vehicles, with Kia outfitting each sedan with modern infotainment and advanced safety features. The K4 debuts with a next-gen layout and a more futuristic design, while the K5 remains a favorite for its comfort and balance of tech and simplicity. No matter which model you choose, you’ll enjoy wireless connectivity and advanced driver assistance systems.

• Remote start and climate control
• Digital Key 2.0
• Kia myQ Connected Garage
• Heated, power-adjustable front seats
• 12.3-inch touchscreen infotainment display
• Wireless Apple CarPlay® and Android Auto™
• Wireless phone charger
• Bose® Premium Audio Systems

Discover The 2026 Kia K4 Vs. Kia K5 Specs Differences At Capitol Kia

Which Kia model is right for you? Contact us online or call 408-267-7100 to compare these vehicles in person and take a test drive! Please let us know if you have questions about the above information or anything else, such as trading in your current vehicle. If you would like to continue your Kia research, review our guides on dashboard warning lights and all-wheel drive models.