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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →The 2026 Kia K4 is the lower-priced compact sedan and has more listed rear legroom; the midsize 2026 Kia K5 gives front-seat passengers more legroom and offers available all-wheel drive and a much more powerful GT trim. Start with the K4 if price, rear-seat space, and a smaller footprint matter most. Consider the K5 if you want more front-seat room, AWD availability, or substantially higher output. These are manufacturer specifications, not results from a comparative road test.
How the K4 and K5 differ
Kia classifies the 2026 K4 as a compact sedan and the 2026 K5 as a midsize sedan. The K5 is longer and has a longer wheelbase, but that does not translate into more listed legroom in every row.
| Specification | 2026 Kia K4 | 2026 Kia K5 |
|---|---|---|
| Kia class | Compact sedan | Midsize sedan |
| Length / wheelbase | 185.4 / 107.1 in. (Kia America) | 193.1 / 112.2 in. (Kia Media) |
| Front / rear legroom | 42.3 / 38.0 in. (Kia America) | 46.1 / 35.2 in. (Kia Media) |
| Base-engine output | 147 hp | 191 hp |
| EPA-estimated combined fuel economy, base FWD configuration | 33 mpg for non-turbo trims | 30 mpg for LXS FWD |
| AWD listed in reviewed U.S. trim specifications | Not listed for the sedan | Available on GT-Line |
Sources: Kia America’s 2026 K4 trim comparison, Kia’s 2026 K4 page, and Kia Media’s 2026 K5 specifications.
What do the K4 and K5 cost?
Kia America lists a $22,290 starting MSRP for the 2026 K4 on its model and trim page; its K4 comparison page cautions that actual dealer pricing may vary. For the K5, Kia’s July 9, 2025 pricing announcement listed the 2026 LXS FWD at $27,490, excluding a separately listed $1,245 destination charge. Kia’s live K5 model listing showed a $27,690 starting MSRP when accessed. Those K5 figures come from different price snapshots, so they should not be treated as a single universal price.
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- Custom Fitment: Designed with 3D laser scanning for 2025 2026 Kia K4 Sedan. Includes 1st & 2nd row floor mats, trunk mat and 4pcs door sill guards — 40% more components than standard sets
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Neither starting figure is an out-the-door quote. Options, taxes, title, license, dealer charges, and local inventory can change what you pay. Compare the equipment on the exact trims you are considering as well as the final dealer quotes; a lower base MSRP alone does not establish like-for-like savings.
Sources: Kia America’s 2026 K4 trim comparison, Kia’s 2026 K4 page, and Kia’s July 9, 2025 K5 pricing announcement.
Rank #2
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Which sedan has more useful passenger space?
The K5 is 7.7 inches longer overall and has a 5.1-inch longer wheelbase, but the K4 lists 2.8 inches more rear legroom. The K5, in turn, lists 3.8 inches more front legroom. If rear passengers are a regular part of the decision, bring them on a test drive and check their comfort with the driver’s seat set to its usual position. The K4’s listed trunk volume is 14.6 cubic feet; a directly comparable K5 trunk figure is not stated in the cited K5 specifications, so confirm cargo dimensions for the specific vehicle before comparing.
Sources: Kia America’s K4 specifications and Kia Media’s K5 specifications.
Rank #3
- Fitment:compatible with KIA K4(2025 2026) All Sedan Models.Please check your year/ model of your vehicle before placing an order
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How do their engines and drivetrains compare?
K4: standard four-cylinder or turbo
K4 LX, LXS, EX, and GT-Line trims use a 2.0-liter four-cylinder rated at 147 hp. The GT-Line Turbo uses a 1.6-liter turbocharged four-cylinder rated at 190 hp and 195 lb-ft. Compare its equipment and local price with the K5 trims you are considering rather than assuming the turbo versions are equivalent in features.
K5: more output, with AWD available on GT-Line
K5 LXS, GT-Line, and EX trims use a 2.5-liter four-cylinder rated at 191 hp and 181.5 lb-ft. The K5 GT’s 2.5-liter turbo is rated at 290 hp and 311 lb-ft, making it the highest-output configuration in this comparison on paper. Kia lists front-wheel drive for LXS, GT-Line, EX, and GT, with AWD available on GT-Line. AWD can be a consideration for local conditions, but it does not guarantee safe traction; tires and road conditions still matter. AWD is not listed in the reviewed U.S. K4 sedan trim data.
Rank #4
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- 【DURABLE & LONG-LASTING】 Made of TPE material, these 2025 k4 floor mats are odorless and free from plastic and chemical smells, maintaining a clean and fresh interior in your car. They are sturdy, wear-resistant, and not flimsy, built to last
- 【FULL SET MAT OF 3】 Driver side mat, Passenger side mat and Rear passenger mat keep the dust and water away from carpet
These are manufacturer-published engine outputs, not comparative acceleration or handling results. Sources: Kia America’s K4 trim comparison and Kia Media’s K5 specifications.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which gets better fuel economy?
EPA estimates vary by trim and drivetrain; they are not one figure for every version of a model.
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Best Value
- Custom Fit: Compatible with 2025-2026 Kia K4 Sedan, Not for Hatchback Model. Please confirm your vehicle model before purchasing
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- All Weather Protection: The 2026 K4 floor mats set are made of durable all weather TPE material which is no smell, no matter in hot or cold weather, protecting car's floor from dirt, scratches, and other damages, maintaining its original appearance. Non-slip surface prevents cargo movement in trunk area
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- JOULARISE Excellent Service: Crafted with precision 3D laser scanning, JOULARISE ensures a custom fit for your 2025 2026 K4 with these full mats set. If items have any problems, please let us know, and we will provide you a satisfactory solution. Notes: The full set car mats are folded during shipping, after receiving leave full mats in sunlight for a while to help restore their original appearance
| 2026 configuration | EPA-estimated city / highway / combined mpg |
|---|---|
| K4 non-turbo trims | 29 / 39 / 33 |
| K4 GT-Line Turbo | 26 / 33 / 28 |
| K5 LXS FWD | 26 / 37 / 30 |
| K5 GT-Line or EX FWD | 25 / 36 / 29 |
| K5 GT-Line AWD | 24 / 33 / 27 |
| K5 GT | 23 / 33 / 27 |
These are Kia-listed EPA estimates: K4 figures appear on Kia’s 2026 K4 page, and K5 figures on Kia Media’s 2026 K5 specifications. Actual mileage varies with driving conditions and vehicle configuration; check the EPA label for the exact car.
What features change by trim?
Equipment depends on trim and, in some cases, packages or options. Check the build sheet for the specific car rather than assuming a feature is standard across the model.
K4 equipment highlights
- Kia lists wireless Apple CarPlay and Android Auto and a 12.3-inch touchscreen among K4 highlights.
- The LXS adds blind-spot detection and rear cross-traffic collision-avoidance assist.
- The EX lists heated front seats, SynTex seat trim, dual-zone automatic climate control, and wireless phone charging.
- The GT-Line adds sport-oriented styling and a power driver seat. The GT-Line Turbo adds the turbo engine, premium audio, a power sunroof, and a larger-display configuration.
K5 equipment highlights
- Kia’s K5 announcement highlights 17 standard collision-avoidance and driver-assist features; feature availability and operation should be checked for the particular trim.
- The GT-Line has available red upholstery. Kia’s specifications also identify GT-Line Premium equipment and GT1-package equipment on the GT, including a panoramic sunroof and premium audio in relevant configurations.
Sources: Kia’s K4 model page, Kia’s K4 trim comparison, Kia Media’s K5 specifications, and Kia’s K5 announcement.
Which should you choose?
- Start with the K4 if its lower listed starting MSRP, compact-sedan footprint, and greater listed rear legroom fit your priorities.
- Compare the K4 GT-Line Turbo if you want more power than the standard K4 engine offers.
- Consider the K5 if you want more listed front legroom, a larger sedan, or the GT-Line AWD option.
- Choose the K5 GT for maximum listed output if its 290-hp turbo engine is the priority and the trim’s price and equipment suit you.
For either car, make the final comparison using the same kind of quote—ideally out-the-door pricing for the exact trim and equipment—alongside a seating check with the people who will ride in it. Official specifications do not establish which model has better real-world ride quality, reliability, resale value, insurance costs, or reviewer preference.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
