2025 Kia K4 GT-Line Turbo: Stylish & Comfy

Kia Motors America was born in 1992. Its first models: the rather bland Sportage and Sephia.

Now 33 years later, no one can call a Kia bland, after it established its Global Design Center led by Chief Design Officer Luc Donckerwolke. He previously worked with Lamborghini and Audi. There’s ex-BMW and Mercedes-Benz folks at Kia now as well. That’s why you can usually pick out a Kia Telluride, Niro or EV6 in a big parking lot, because their design differs from the masses.

Now comes the replacement for the Forte, a compact Kia whose first-gen in 2008 birthed two more before the design door shut on it, and the K4 was born.

At first glance, the new Kia K4 looks like an average import hatchback sedan – but it’s not. It has a traditional turnk.

The nose continues to evolve the decade-old trademark Kia “Tiger Grille,” which is a slim center section with taller outer pieces, flowing into sweeping T-shaped LED daytime running lights. It’s quite dramatic. The inverted amber “Ls” framing vertically with stacked LED headlights at each end. The lower grille below it is aggressive, with an air dam and gloss black side inlets.

The hood gets some nice sculpting, while gloss black, thin-spoked alloy wheels wear 18-inch Kumho tires, somewhat small-looking disc brakes visible inside the spokes, all four wheels framed in black edging that includes flared center sills.

The roof is coupe-like, flowing down to the “looks-like-a-hatchback” fastback as side windows get neat alloy accents next to door handles nicely hidden in gloss black panels at the rear taper points. There’s a trunk lid that gets a black accent where the rear window ends, over a black and chrome strip that joins angular rear light clusters with slim LED elements and brakes. Rear fenders give a nice broad-shouldered look. A bold lower black fascia gets aero finlets and a dual exhaust in one corner.

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More than one person said it looks like Kia’s now-departed Stinger, which was a really nice rear-wheel-drive performance sedan. I liked the way the windshield sweeps into our gray sedan’s long, black moonroof for a bit of contrast. The K4 is about three inches longer, on a wheelbase that’s less than an inch longer than the old Forte. The K4’s looks benefit from the stretch, and at 55.9-inches-tall, it’s half-inch drop in height gives it a leaner, more aggressive look aided by those black wheels and sportier rubber.

One nice moment – I parked at an event, only to return and find my test car’s near twin – a base K4 in the same grayish Morning Haze color, even – parked behind me, only lacking the cool rear aero valance of my sportier-looking version.

2025 Kia K4 Interior

The onyx over off-white interior is dominated by a sweeping digital infotainment display that’s just over 28 inches wide and about 5 inches tall, neatly integrated into the dashtop and not free-standing as in some cars. There’s an interestingly squoval (squared-oval) steering wheel with the usual buttons on it, plus scrolling audio volume and a Sport/Normal drive mode button.

That display places a simple digital speedometer and tachometer display athwart a center display that can show trip info, navigation and more, with basic temp and gas level/distance-to-empty always shown. My favorite – the tach or speedometer converts to that side’s blind-spot camera when the turn signal is flipped. My not-so-fave, the right rim of the leather-padded steering wheel pretty much eclipsed the central climate control screen and its touchscreen buttons for defrost, vent position and recirculate. There are real buttons nearby for dual-mode fan, temperature and vent position.

Then comes a widescreen navigation map that also converts to segments you can swipe left or right for map, audio, phone. Sounds of Nature like “On a Sailing Ship” and “Experience the Universe” are also available, although I still do not know why someone wants those soothing sounds as they drive. Main menu buttons line the bottom with big air vents, while accent lighting glows between smooth padded dashtop and textured center trim.

The seats are done in 2-tone leather-like pleather with heat and cooling, plus dual memory presets and a bit of power lumbar for the driver. They are comfy and fairly supportive, a softly-embossed “GT-Line” in the upper seatbacks, and dual memory presets for the driver.

The wide center console’s got size-adjustable cup holders, a wireless inductive phone charger slot in a padded below-dash nook, and USB ports. And moving up in the world, Kia gives us hands-free voice command. You can say “Hey Kia” and access climate control and audio, while Digital Key 2.0 allows use of compatible Apple and Android smart devices as virtual vehicle keys. A list of compatible devices is available on Kia’s webiste.

The back seats have good head and leg room, plus vents and more USB ports. But the sloped rear roof means you have to duck a bit to get in. Rear seatbacks split and fold to add to a decent-sized 14.6-cu. ft. trunk, which has a wide opening but is a bit smaller than the Forte’s. A space-saving spare takes up most of the under-floor space. And the rear window’s a bit slim due to the high deck inside, so rear three-quarter vision is a bit tight.

Overall, it’s a very comfy and roomy interior with solid audio. Wireless Apple CarPlay and Android Auto comes standard.

2025 Kia K4 Performance, Handling

There’s a Forte carryover 2-liter engine under the hood with 147-hp in the base K4; while our GT-Line Turbo gets the turbocharged aluminum 1.6-liter four with 190-hp at 6,000 rpm, and 195 lb-ft or torque at 1,700-4,500 rpm. The GT-Line Turbo also gets an 8-speed automatic transmission vs. the base model’s CVT.

Called a GT-Line, this K4 is sporty, but not a true sports sedan. There’s a Normal and Sport drive mode, the latter juicing throttle response and tightening steering feel. In Normal mode, the K4 rolls of sedately, then the turbocharger joins in to see 60 mph in 7.3 seconds. We got about the same sprint time in Sport mode, a slight touch of torque street and sharper shifts as it moves out en route to 60 mph in 7.1 seconds. There’s a nice exhaust snarl, and smooth upshifts and fluid kickdown, and a bit more urge in passing – my favorite mode for daily running. The paddle shifters gave us quick downshifts as we entered corners, but I didn’t use them much.

For comparison, the 201-hp Kia Forte I tested a year ago for a since-retired website, with a familiar turbocharged 1.6-liter four, hit 60 mph in about 6.8 seconds. Fuel mileage for the K4 averaged between 24 and 27 mpg.

The K4 GT-Line gets MacPherson strut front and model-exclusive multi-link rear suspension, hydraulic twin tube shock absorbers all-round. The ride in Normal and Sport modes was comfortable, easily absorbing road bumps and lumps, although there was a bit of bounce (single one) after a speed bump. And whether it is the tires or suspension, there’s a harsh thump when hitting a highway tar strip. But the handling was a pleasant surprise, with a tight steering feel in Sport mode that mixed well with near-neutral cornering in most corners. You can power in, then out with a minimum of understeer. There’s not much evident body roll either, the only understeer noise from the front rubber appearing in a skidpad, but easy to handle with throttle.

The power steering had a tight feel in Sport, with more feel in cornering, versus a bit artificially over-boosted feel in Normal Mode. With 2.4-turns lock-to-lock, this family sedan had a tight turning radius. The 7,000-mile-old test sedan showed no sign of brake fade after repeated hard use of the 11.3-inch ventilated front/10.3-inch solid rear disc brakes. They had a nice bite after initial foot tap, then the K4 stopped straight, with minimal nose dive.

The K4 GT-Line Turbo had some safety gear, like smart cruise which maintains speed and distance to a stop, then stays there until you ask for it to start again. Then there’s those great blind-spot cameras mentioned earlier that display on the gauge panel, along with alerts that blink in side mirrors, and parking and collision assist. The lane-keep assist works smoothly if a bit firmly to keep you in lane, a bit too much for those who want to steer.

The base Kia K4 LX starts at $21,990 with the 2-liter four while our GT-Line Turbo starts at $28,090 with almost all we had standard, including 8-speaker Harman Kardon premium audio, sunroof and faux-leather seat trim. Our car included the $2,200 tech option with smartphone digital key, memory driver’s seat, ventilated front seats, safety systems and ambient lighting, carrying a final MSRP price of $31,445.

Bottom line: Very stylish, very roomy and comfy, and decent performance. But some competition is sharper in road feel and handling. FYI, a Kia K4 hatchback is coming soon. It’s probably the one I’d get to haul a dog, ladder and friends. And while gas/front-wheel-drive is the only drivetrains for now, a hybrid might be coming.

2025 Kia K4 GT-Line Turbo Specifications

Vehicle type – 4-door, front-wheel-drive compact sedan

Base price – $28,090 ($31,445 as tested)

Engine type – Turbocharged aluminum DOHC, C-VVT in-line four-cylinder

Displacement – 1.6-liter

Horsepower (net) – 190 @ 6,000 rpm

Torque (lb-ft) – 195 @ 1,700- 4,500 rpm

Transmission – 8-speed automatic with manual and paddle shifting

Wheelbase – 107.1 inches

Overall length – 185.4 inches

Overall width- 72.8 inches

Height – 55.9 inches

Front headroom – 37.1 inches

Front legroom – 42.3 inches

Rear headroom – 37 inches

Rear legroom – 38 inches

Cargo capacity – 14.6 cu.ft.

Curb weight – – 2,944 lbs.

Fuel capacity – 12.4 gallons

Mileage rating – 26 mpg city/36 mpg highway