2025 Hyundai Sonata vs 2025 Kia K4

$26,900 · Sedan

$21,990 · Sedan

Comparison Overview

The most significant numerical disparity between the 2025 Hyundai Sonata and the 2025 Kia K4 is the $4,910 difference in MSRP, with the K4 starting at $21,990 versus the Sonata's $26,900. This price gap correlates with measurable performance differences; the Sonata boasts 191 hp and 181 lb-ft of torque, substantially outperforming the K4's 147 hp and 132 lb-ft. Conversely, the K4 demonstrates superior fuel efficiency, achieving 34 combined MPG compared to the Sonata's 32 combined MPG, with highway ratings of 40 MPG versus 38 MPG. The Sonata is physically larger, measuring 193.3 inches in length against the K4's 185.4 inches, which translates to a marginally larger cargo area of 15.6 cu ft in the Sonata compared to the K4's 14.6 cu ft. Both utilize FWD, but the Sonata pairs its power with an 8-speed shiftable automatic, while the K4 uses a CVT.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 Kia K4

The Kia K4 wins for daily commuting due to its superior 34 combined MPG rating and lower entry price.

👨‍👩‍👧‍👦 Best for Families

2025 Hyundai Sonata

The 2025 Hyundai Sonata offers a slightly larger 15.6 cu ft cargo capacity and a more powerful powertrain for moving families.

🏎️ Best for Enthusiasts

2025 Hyundai Sonata

The Sonata provides significantly more power with 191 hp and 181 lb-ft of torque compared to the K4's output.

💰 Best Value

2025 Kia K4

The Kia K4 presents a stronger value proposition by offering better fuel economy and a $4,910 lower starting MSRP.

Choose the Hyundai Sonata if...

Performance is prioritized, evidenced by the 191 hp output.
A larger vehicle footprint is desired, as the Sonata measures 193.3 inches long.
You prefer the mechanical certainty of an 8-speed shiftable automatic transmission over a CVT.

Choose the Kia K4 if...

Budget is the primary constraint, given the $21,990 MSRP.
Maximum fuel economy is necessary, highlighted by the 30/40 MPG city/highway ratings.
A smaller vehicle size is advantageous for urban parking (185.4 inches long).

Key Dimensions

Dimension	Hyundai Sonata	Kia K4
Length	193.3"	185.4"
Width	73.2"	72.8"
Height	56.9"	55.9"
Wheelbase	111.8"	107.1"

Features Comparison

Safety

Feature	Hyundai	Kia
Blind Spot Monitor	✓	—
Lane Departure Warning	✓	✓
Lane Keeping Assist System	✓	✓
Rear Cross Traffic Alert	✓	✓
Driver Attention Alert	✓	✓
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Dual Rear Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Rear Head Airbags	✓	✓
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
LATCH System	✓	✓
Rear Door Child Safety Locks	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Front Ventilated Disc Brakes	✓	✓
Rear Solid Disc Brakes	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	3	3
Rear Fixed Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓

Engine

Feature	Hyundai	Kia
Base Engine Displacement	2.5 L	2.0 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	gas	gas
Horsepower	191 hp @ 6100 rpm	147 hp @ 6200 rpm
Torque	181 lb-ft @ 4000 rpm	132 lb-ft @ 4500 rpm
Number of Valves	16	16
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	—

Drive Train

Feature	Hyundai	Kia
Transmission Type	8-speed shiftable automatic	continuously variable-speed automatic
Drivetrain Type	front wheel drive	front wheel drive

Fuel

Feature	Hyundai	Kia
Fuel Type	regular unleaded	regular unleaded
EPA Fuel Economy (City/Highway)	28/38 MPG	30/40 MPG
EPA Fuel Economy (Combined)	32 MPG	34 MPG
EPA Driving Range (City/Highway)	0/0 mi.	372.0/496.0 mi.
Fuel Tank Capacity	—	12.4 gal.

Comfort & Convenience

Feature	Hyundai	Kia
Push Button Start	✓	✓
Tilt and Telescopic Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Cruise Control on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Rear View Camera	✓	✓
Adaptive Cruise Control	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	—
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	—
Air Conditioning	✓	✓
Interior Air Filtration	✓	—
Extended Cabin Heating/Cooling	✓	—
Dual Vanity Mirrors	✓	✓

In Car Entertainment

Feature	Hyundai	Kia
Infotainment Display	12.3 in	12.3 in
AM/FM Stereo	✓	✓
Speaker System	6	4
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	—	3 months

Power Feature

Feature	Hyundai	Kia
One-Touch Power Windows	1	1
Keyless Entry	✓	✓
Heated Mirrors	✓	✓

Frontseats

Feature	Hyundai	Kia
Front Head Room	40.0 in.	39.0 in.
Front Leg Room	46.1 in.	42.3 in.
Front Shoulder Room	57.9 in.	56.5 in.
Front Hip Room	54.6 in.	53.3 in.
Seat Material: Cloth	✓	✓
Front Seat Type: Bucket	✓	✓
Driver Seat Manual Adjustments	6-way	6-way
Driver Seat Height Adjustment	✓	✓
Passenger Seat Manual Adjustments	6-way	6-way
Passenger Seat Height Adjustment	—	✓

Rearseats

Feature	Hyundai	Kia
Rear Head Room	37.8 in.	37.3 in.
Rear Leg Room	34.8 in.	38.0 in.
Rear Shoulder Room	56.1 in.	54.7 in.
Rear Hip Room	54.4 in.	51.9 in.
Split-Folding Rear Seatback	✓	—
Folding Center Armrest	✓	—
Folding Rear Seatback	—	✓

Tires and Wheels

Feature	Hyundai	Kia
Wheel Material	Alloy	Steel
Wheel Size	16 x 6.5 in	16 x 6.5 in
Tire Type	All Season	All Season
Tire Size	205/65R16	205/55R16
Spare Tire Type	Temporary	Temporary
Spare Tire Location	Inside Mounted	Inside Mounted
Wheel Cover Type	—	Full

Suspension

Feature	Hyundai	Kia
Four-Wheel Independent Suspension	✓	—
Front Stabilizer Bar	✓	—
Rear Stabilizer Bar	✓	—
Front Suspension Type	—	Independent
Stabilizer Bar	—	✓

Warranty

Feature	Hyundai	Kia
Basic Warranty	5 yr./ 60000 mi.	5 yr./ 60000 mi.
Drivetrain Warranty	10 yr./ 100000 mi.	10 yr./ 100000 mi.
Corrosion/Rust Warranty	7 yr./ unlimited mi.	5 yr./ 100000 mi.
Roadside Assistance	5 yr./ unlimited mi.	5 yr./ 60000 mi.
Complimentary Scheduled Maintenance	3 yr./ 36000 mi.	—

Frequently Asked Questions

Common questions about comparing the 2025 Hyundai Sonata and 2025 Kia K4.

What is the primary mechanical difference between the standard engines of the 2025 Sonata and K4?

The 2025 Sonata comes standard with a 191 hp engine producing 181 lb-ft of torque, utilizing an 8-speed automatic transmission. In contrast, the 2025 K4 base model offers 147 hp and 132 lb-ft of torque paired with a continuously variable-speed automatic (CVT).

How significant is the fuel economy advantage of the Kia K4 over the Hyundai Sonata?

The Kia K4 holds a slight edge in efficiency, achieving 34 combined MPG (30 city/40 highway). The Hyundai Sonata is rated slightly lower at 32 combined MPG (28 city/38 highway).

Does the higher price of the Sonata justify the difference in interior space?

The Hyundai Sonata costs $4,910 more, but only yields a 1.0 cu ft advantage in cargo capacity (15.6 cu ft vs. 14.6 cu ft). The increased size also reflects in its 193.3-inch overall length compared to the K4's 185.4 inches.

Are there differences in the fuel type required for these two sedans?

No, both the 2025 Hyundai Sonata and the 2025 Kia K4 are specified to run on regular unleaded gasoline, preventing any extra cost associated with premium fuel.

For drivers prioritizing power output, which vehicle delivers better performance metrics?

The 2025 Hyundai Sonata is the superior choice for performance, offering 44 more horsepower (191 hp vs. 147 hp) and 49 more lb-ft of torque (181 lb-ft vs. 132 lb-ft).

Since both are FWD, what transmission choice influences the driving experience?

The Sonata uses a traditional 8-speed shiftable automatic, which some drivers prefer for more distinct gear changes under acceleration. The K4 uses a CVT, which generally provides smoother, gearless acceleration suited for maximizing MPG.