Buyers can choose from five trims: LX, LXS, EX, GT-Line, and GT-Line Turbo. Basic versions sport 16-inch wheels. Higher trims offer shiny black detailing, chrome trim, and striking 17- and 18-inch wheels. The bold fastback shape and hidden back door handles distinguish the K4.

The K4's front fascia turns heads with its rounded nose, unique grille, and thin running lights. Size-wise, this vehicle is a major contender in its class. At 185.4 inches long and 72.8 inches wide, it's the broadest option out there. All models have tall LED headlights and taillights.

The GT-Line Turbo is the premier option of the K4 family. It enhances the K4’s sophisticated design with LED projection headlights and one-of-a-kind, 18-inch sport alloy wheels.

Under the hood, drivers have two potent engine choices. The basic 2.0-liter four-cylinder puts out 147 horsepower and 132 pound-feet of torque. It works with a transmission that changes gears without steps, making the ride smooth and saving gas. For enhanced performance, the GT-Line Turbo model boasts a 1.6-liter four-cylinder turbocharged engine that produces 190 horsepower and 195 pound-feet of torque paired with an eight-speed automatic transmission. The top-tier model comes with paddle shifters on the steering wheel and sport pedals.

The 2025 Kia K4's suspension delivers a refined driving experience. Higher trims boast a multi-link rear suspension. This setup makes for a smoother ride and sharper turns. Other variants use a torsion beam rear axle configuration. The 2.0-liter engine sips fuel like a pro: 30 mpg in the city and 40 mpg on the highway. Want more power? The 1.6-liter turbocharged engine delivers thrills without consuming excessive gas. It gets 27 mpg in the city and 37 mpg on the highway. The K4 sets a new standard in its class for driving enjoyment, offering an experience that's hard to match.

The 2025 Kia K4 contains a bold, 30-inch screen array, including a 12.3-inch touchscreen display, twin 12.3-inch instrument displays, and a 5-inch climate control display. Wireless Apple CarPlay and Android Auto are included. The front and rear offer 37.3 inches of headroom and 38 inches of legroom. Options include heated and cooled front seats, a panoramic sunroof, and, in the GT-Line Turbo, a Harman Kardon sound system. Voice assistant Alexa allows drivers to manage functions hands-free. The cabin features chic seat patterns and 14.6 cubic feet of trunk space.

The 2025 K4 comes with advanced protection features. Some trims boast smart cruise control, lane-keeping assist, blind-spot collision warning, a rearview camera and rear cross-traffic avoidance assist. The K4 is equipped with multiple air bags, including rear seat air bags. It also offers highway driving assistance and parking assistance for tight city spaces.

Kia's confidence in the K4 shows with a comprehensive warranty that includes five years or 60,000 miles of limited basic coverage and ten years or 100,000 miles of limited coverage for the engine and transmission.