
Introduction

The brand-new Kia K4 is a compact sedan known for its spacious interior, with class-leading second-row legroom. Its Connected Car Navigation Cockpit features two screens, giving you nearly 30 inches of viewable screen space, and this is just the front area.
The 2025 Kia K5 is a mid-size sedan. If it looks familiar and gives you that love-at-first-sight feeling, it is the Kia Optima rebranded for the 2021 model rollout, now its fifth generation of production.
In this guide to shopping for sedans at Alan Jay Kia, we compare the design, performance, and features of the all-new 2025 Kia K4 and Kia K5 to help you decide which Kia sedan suits your style.
Key Takeaways

- The all-new 2025 K4 and K5 are Kia sedans with incredible interior features and driver assistance technology.
- The brand-new 2025 Kia K4 is a compact sedan with class-leading passenger legroom.
- Kia drivers choose the new 2025 sedan models because they are fuel-efficient, high-performance, and fully loaded with features.
What are the differences between the 2025 Kia K4 and 2025 Kia K5?

The 2025 Kia K4 is a sophisticated yet affordable compact sedan. Although smaller than the K5, its interior is notably spacious and roomy. According to Car and Driver, it has class-leading legroom and a spacious trunk. The K4 is also loaded with technology and features.
As a mid-size sedan, the K5 stands out for its affordability for a car with luxury and high-performance features like ambient lighting, panoramic sunroof, wide-track sport-tuned suspension, and Pirelli tires.
Now, the K4 is loaded with features like Kia’s Driver Assistance Technology, including Blind-Spot Collision Warning, Lane Keeping Assist, Smart Cruise Control, and more, but it is the 2025 Kia K5 model trims that includes more of these features in all five trims.
According to the EPA, the Kia K5 has a bigger fuel tank capacity of over three gallons, meaning it has a longer driving distance total of 474 miles.
Another difference is the engine in these Kia sedans. Every 2025 Kia K4 trim except the GT-Line Turbo, which has the turbocharged 1.6L four-cylinder engine, has the 2.0L four-cylinder engine.
The 2025 Kia K5 trims, excluding the GT, feature a 2.5L four-cylinder engine that produces 191 horsepower, while the GT has a turbocharged 2.5L four-cylinder engine.
Who should buy the 2025 Kia K4?
If you love driving a sophisticated sedan with legroom for every passenger plus a fully loaded interior of driver assistance technology, wireless charging, Apple CarPlay, Android Auto, the premium Harman Kardon audio sound system, Remote Start, Kia Connect, USB ports, power outlets in one of best vehicles on the road for an affordable price, then the Kia K4 is for you.
The 2025 Kia K4 is a standout compact sedan, ranked second overall by J.D. Power in the “Best Compact Car of 2025" category.
Who should buy the 2025 Kia K5?
If you are looking for a mid-size sedan with a sleek, modern interior designed to look like a cockpit to accentuate the handling and feel of a high-performance car, then the new 2025 K5 is for you.
You’re in the driver’s seat of your new 2025 Kia K5 every day, enjoying a spacious, luxurious interior with wall-to-wall technology, connectivity, and convenience.
From the Kia Connect system to the fully loaded Driver Assistance technology features, you can drive with better handling, seamless streaming, top-tier navigation, and the peace of mind of the industry-leading Kia 10-year/100,000-mile warranty.
The All New 2025 Kia Sedans
Whether you drive the 2025 Kia K4 or the K5, we know it is based on the Kia family brand's reliability, affordability, and familiarity. Visit us today and see the selection of Kia vehicles at Alan Jay Kia, where your stress-free buying experience is truly our priority.
Buy your next new car from Alam Jay Kia in Sebring and become part of our car family. See you soon!