VS
At a Glance
Power
191hp @ 6100
190hp @ 6000
Torque
181lb-ft @ 4000
195lb-ft @ 1700
Fuel
30 mpg est.
31 mpg est.
Engine
2.5 L/152ci
1.6 L/98ci
Choosing between the Hyundai Sonata and the KIA K4 is one of the most common decisions car buyers in the United States face. The Hyundai Sonata delivers 191hp @ 6100 while the KIA K4 produces 190hp @ 6000. On fuel, the Sonata returns 30 mpg est. while the K4 uses 31 mpg est. — important in a market where fuel prices change monthly. Pricing starts at $29,000 for the Sonata and $28,390 for the K4. Both vehicles have their merits. The right choice depends on your priorities: fuel economy, performance, towing ability, safety features or total cost of ownership. This comparison covers every specification available so you can make an informed decision.
Specification
Hyundai SonataSEL Sport FWD 2026 - From $29,000
KIA K4GT-Line Turbo Sedan 2026 - From $28,390
Performance
Power Output (hp)
191hp @ 6100
190hp @ 6000
Torque (lb-ft)
181lb-ft @ 4000
195lb-ft @ 1700
Engine & Drivetrain
Engine Capacity
2.5 L/152ci
1.6 L/98ci
Cylinders
4
4
Fuel Type
Gasoline
Gasoline
Forced Induction Device
—
Turbocharged
Transmission
Automatic
Automatic
Number of Gears
8
8
Drive Wheels
Front Wheel Drive
Front Wheel Drive
Fuel Economy
Fuel Economy (Combined, est.)
30 mpg est.
31 mpg est.
Fuel Economy - City (mpg)
25 (2025)mpg
26 (2025)mpg
Fuel Economy - Highway (mpg)
36 (2025)mpg
36 (2025)mpg
Fuel Tank Capacity (gal)
15.9gal
12.4gal
Dimensions
Length (in)
193.3in
185.4in
Width (in)
73.2in
72.8in
Height (in)
56.9in
55.9in
Wheelbase (in)
111.8in
107.1in
Curb Weight (lbs)
3305lbs
3283lbs
Safety
ABS
✓ Standard
✓ Standard
Brake Assist
✓ Standard
✓ Standard
Stability Control
✓ Standard
✓ Standard
Traction Control
✓ Standard
✓ Standard
Driver Airbag
✓ Standard
✓ Standard
Passenger Airbag
✓ Standard
✓ Standard
Side Airbags Front
✓ Standard
✓ Standard
Curtain Airbags
✓ Standard
✓ Standard
Features & Tech
Air Conditioning
✓ Standard
✓ Standard
Climate Control
✓ Standard
✓ Standard
Cruise Control
✓ Standard
✓ Standard
Adaptive Cruise Control
✓ Standard
✓ Standard
Bluetooth
✓ Standard
✓ Standard
Backup Camera
✓ Standard
✓ Standard
Rear Parking Aid
—
✓ Standard
Sunroof
—
✓ Standard
Heated Seats
✓ Standard
✓ Standard
Power Seat Adjustment
✓ Standard
✓ Standard
Keyless Entry
✓ Standard
✓ Standard
Alloy Wheels
✓ Standard
✓ Standard
The Verdict
Which Wins?
Overall Winner
KIA K4
2 / 4 categories
Performance
Sonata
Fuel Economy
K4
Value
K4
Practicality
Tied
Pros & Cons
Hyundai Sonata
Well-rounded specification
Higher fuel consumption (30 mpg est.)
Higher starting price
KIA K4
Better fuel economy (31 mpg est.)
Lower starting price ($28,390)
Few notable weaknesses
Frequently Asked Questions
Which is more fuel efficient, the Sonata or K4?
The Sonata gets 30 mpg est. and the K4 gets 31 mpg est. on the combined cycle. The K4 is the more fuel-efficient choice. In real-world conditions with a mix of highway and urban driving, actual figures will be slightly higher.
Which has more power, the Sonata or K4?
The Sonata produces 191hp @ 6100 and 181lb-ft @ 4000 of torque while the K4 delivers 190hp @ 6000 and 195lb-ft @ 1700 of torque. They produce closely matched power outputs.
What is the price difference between the Sonata and K4?
The Sonata starts from $29,000 and the K4 from $28,390. The K4 is cheaper by $610 at this variant level. Final on-the-road pricing varies by dealer and specification.
Should I buy the Sonata or the K4?
It depends on your priorities. If fuel economy matters most, check the mpg figures above. If you need towing capacity, compare the towing ratings. For day-to-day driving - commutes, school runs and highway trips - consider ground clearance, service network coverage, and total cost of ownership including insurance and maintenance. Use the spec tables above to compare every detail before making your decision.
Also Consider