2025 Kia K4 vs 2026 Mazda 3

$21,990 · Sedan

$24,550 · Sedan

Comparison Overview

Trying to decide between the dependable efficiency of the new 2025 Kia K4 and the spirited refinement of the 2026 Mazda 3? It's a classic trade-off between savings and driving enjoyment. The K4 hits the pavement with a highly efficient 34 MPG combined, using its 147 hp engine to sip fuel, while the Mazda 3 demands a $2,560 higher MSRP at $24,550 and sacrifices 4 MPG for significantly more zest, delivering 186 hp and 186 lb-ft of torque. Furthermore, the K4 offers slightly more utility with 14.6 cu ft of cargo space compared to the Mazda 3’s 13.2 cu ft, although the Mazda is a touch taller at 56.9 inches. For budget-conscious drivers prioritizing miles between fill-ups, the K4’s economy is a clear advantage, whereas buyers wanting accessible power will gravitate toward the Mazda’s robust performance figures.

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 MPG combined fuel economy versus the Mazda 3's 30 MPG.

👨‍👩‍👧‍👦 Best for Families

2025 Kia K4

The Kia K4 edges out the competition by providing slightly more usable storage with 14.6 cu ft of cargo capacity compared to the Mazda 3’s 13.2 cu ft.

🏎️ Best for Enthusiasts

2026 Mazda 3

The 2026 Mazda 3 is the enthusiast's choice, boasting 186 hp and 186 lb-ft of torque, significantly outgunning the K4's 147 hp.

💰 Best Value

2025 Kia K4

The Kia K4 offers better foundational value with a $2,560 lower starting MSRP of $21,990 and better fuel savings.

Choose the Kia K4 if...

You absolutely need the best fuel economy, targeting 40 MPG highway.
You want to keep your initial purchase price low, starting at $21,990.
You prefer slightly more luggage room, as the K4 offers 14.6 cu ft versus 13.2 cu ft.

Choose the Mazda 3 if...

You prioritize acceleration and performance, appreciating the 39 hp advantage.
You prefer the traditional feel of a 6-speed shiftable automatic transmission.
You value a slightly taller cabin height (56.9 inches) for better headroom.

Key Dimensions

Dimension	Kia K4	Mazda 3
Length	185.4"	183.5"
Width	72.8"	70.7"
Height	55.9"	56.9"
Wheelbase	107.1"	107.3"

Features Comparison

Safety

Feature	Kia	Mazda
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	✓	✓
Blind Spot Monitor	—	✓
Brake Preparation System	—	✓
Integrated Turn Signal Mirrors	—	✓
Rear Height Adjustable Headrests	—	✓

Engine

Feature	Kia	Mazda
Base Engine Displacement	2.0 L	2.5 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	gas	gas
Horsepower	147 hp @ 6200 rpm	186 hp @ 6000 rpm
Torque	132 lb-ft @ 4500 rpm	186 lb-ft @ 4000 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	Kia	Mazda
Transmission Type	continuously variable-speed automatic	6-speed shiftable automatic
Drivetrain Type	front wheel drive	front wheel drive

Fuel

Feature	Kia	Mazda
Fuel Type	regular unleaded	regular unleaded
EPA Fuel Economy (City/Highway)	30/40 MPG	27/36 MPG
EPA Fuel Economy (Combined)	34 MPG	30 MPG
EPA Driving Range (City/Highway)	372.0/496.0 mi.	356.4/475.2 mi.
Fuel Tank Capacity	12.4 gal.	13.2 gal.

Comfort & Convenience

Feature	Kia	Mazda
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	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Air Conditioning	✓	—
Dual Vanity Mirrors	✓	✓
Single Zone Climate Control	—	✓
Turn Signal Indicators in Mirrors	—	✓

In Car Entertainment

Feature	Kia	Mazda
Infotainment Display	12.3 in	8.8 in
AM/FM Stereo	✓	✓
Speaker System	4	8
Android Auto (Wireless)	✓	—
Apple CarPlay (Wireless)	✓	—
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	—
Satellite Radio Trial Period	3 months	—
Android Auto (Wired)	—	✓
Apple CarPlay (Wired)	—	✓

Power Feature

Feature	Kia	Mazda
One-Touch Power Windows	1	4
Keyless Entry	✓	—
Heated Mirrors	✓	✓
Remote Keyless Entry	—	✓

Frontseats

Feature	Kia	Mazda
Front Head Room	39.0 in.	38.0 in.
Front Leg Room	42.3 in.	42.3 in.
Front Shoulder Room	56.5 in.	55.7 in.
Front Hip Room	53.3 in.	54.6 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	4-way
Passenger Seat Height Adjustment	✓	—

Rearseats

Feature	Kia	Mazda
Rear Head Room	37.3 in.	37.3 in.
Rear Leg Room	38.0 in.	34.4 in.
Rear Shoulder Room	54.7 in.	53.5 in.
Rear Hip Room	51.9 in.	50.9 in.
Folding Rear Seatback	✓	—
Split-Folding Rear Seatback	—	✓
Reclining Rear Seats	—	✓

Tires and Wheels

Feature	Kia	Mazda
Wheel Material	Steel	Alloy
Wheel Cover Type	Full	—
Wheel Size	16 x 6.5 in	16 x 6.5 in
Tire Type	All Season	All Season
Tire Size	205/55R16	205/60R16
Spare Tire Type	Temporary	Temporary
Spare Tire Location	Inside Mounted	Inside Mounted

Suspension

Feature	Kia	Mazda
Front Suspension Type	Independent	Independent
Stabilizer Bar	✓	✓

Warranty

Feature	Kia	Mazda
Basic Warranty	5 yr./ 60000 mi.	3 yr./ 36000 mi.
Drivetrain Warranty	10 yr./ 100000 mi.	5 yr./ 60000 mi.
Corrosion/Rust Warranty	5 yr./ 100000 mi.	5 yr./ unlimited mi.
Roadside Assistance	5 yr./ 60000 mi.	3 yr./ 36000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Kia K4 and 2026 Mazda 3.

How significant is the performance difference between these two sedans?

The difference is quite noticeable; the 2026 Mazda 3 delivers 186 hp and 186 lb-ft of torque, while the 2025 Kia K4 provides a more modest 147 hp. This 39 hp deficit means the K4 will feel less punchy when merging or passing.

Is the Kia K4 truly more economical for highway driving?

Yes, the K4 holds a clear advantage in efficiency, rated for 40 MPG highway, whereas the Mazda 3 manages 36 MPG highway. This results in saving money and fewer stops for the K4 owner.

Which car has more space for passengers and cargo?

The Kia K4 offers better raw cargo capacity at 14.6 cu ft compared to the Mazda 3's 13.2 cu ft. However, the Mazda 3 is slightly taller, which might translate to marginally better headroom.

Why is the 2026 Mazda 3 priced $2,560 higher than the Kia K4?

The higher MSRP of $24,550 for the Mazda 3 likely reflects its more powerful engine (186 hp) and its use of a 6-speed shiftable automatic transmission, potentially indicating a more premium driving experience than the K4's standard CVT.

Do either of these cars require premium fuel?

No, both the 2025 Kia K4 and the 2026 Mazda 3 are specified to run on regular unleaded fuel, keeping running costs down across the board for both models.

How do their physical sizes compare on the road?

The Kia K4 is slightly longer at 185.4 inches compared to the Mazda 3's 183.5 inches, but the K4 is also noticeably wider at 72.8 inches versus the Mazda's 70.7 inches.