2026 Kia K5 vs 2026 Mazda 3

$27,390 · Sedan

$24,550 · Sedan

Comparison Overview

Trying to decide between the sharp new 2026 Kia K5 and the refined 2026 Mazda 3 often comes down to a classic trade-off: space versus initial cost. The K5 clearly boasts more physical room, stretching 193.1 inches long and offering a larger 15.6 cu ft of cargo space compared to the Mazda 3's 13.2 cu ft. However, the Mazda 3 starts at a notably lower MSRP of $24,550 against the K5’s $27,390. Performance is very close; the K5 edges out slightly with 191 hp versus the Mazda's 186 hp, though both achieve an identical 30 MPG combined. The differences are subtle but important: the K5 feels bigger and slightly stronger, while the Mazda 3 offers immediate savings right off the lot, making the choice dependent on whether you prioritize outright size or budget.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Kia K5

The Kia K5 offers better highway efficiency at 37 MPG compared to the Mazda 3's 36 MPG, providing minimal ongoing fuel savings.

👨‍👩‍👧‍👦 Best for Families

2026 Kia K5

The K5 wins for families due to its longer body (193.1 inches) and substantially greater cargo capacity of 15.6 cu ft.

🏎️ Best for Enthusiasts

2026 Kia K5

The Kia K5 technically has the higher output with 191 hp and 181 lb-ft of torque compared to the Mazda 3's 186 hp and 186 lb-ft.

💰 Best Value

2026 Mazda 3

The Mazda 3 presents superior value with a significantly lower starting MSRP of $24,550.

Choose the Kia K5 if...

You frequently need to haul more luggage, as the K5 offers 15.6 cu ft of cargo space, which is significantly more than the Mazda 3's 13.2 cu ft.
You prefer the smoother shifting feel from the K5's 8-speed automatic transmission over the Mazda 3's 6-speed unit.
You want the extra bulk for highway driving, given the K5 is over 9 inches longer than its competitor.

Choose the Mazda 3 if...

Keeping the initial purchase price low is key, as the Mazda 3 starts at $24,550, saving you $2,840 immediately.
Your daily driving heavily favors city environments, as the Mazda 3 achieves 27 MPG in the city versus the K5's 26 MPG.
You appreciate a slightly more robust torque figure (186 lb-ft) that slightly edges out the K5's 181 lb-ft, even with less horsepower.

Key Dimensions

Dimension	Kia K5	Mazda 3
Length	193.1"	183.5"
Width	73.2"	70.7"
Height	56.9"	56.9"
Wheelbase	112.2"	107.3"

Features Comparison

Safety

Feature	Kia	Mazda
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	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	3	3
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Brake Preparation System	—	✓
Integrated Turn Signal Mirrors	—	✓

Engine

Feature	Kia	Mazda
Base Engine Displacement	2.5 L	2.5 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	gas	gas
Horsepower	191 hp @ 6100 rpm	186 hp @ 6000 rpm
Torque	181 lb-ft @ 4000 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	8-speed shiftable 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)	26/37 MPG	27/36 MPG
EPA Fuel Economy (Combined)	30 MPG	30 MPG
EPA Driving Range (City/Highway)	410.8/584.6 mi.	356.4/475.2 mi.
Fuel Tank Capacity	15.8 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	✓	✓
Front Parking Sensors	✓	—
Rear Parking Sensors	✓	—
Adaptive Cruise Control	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	—
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	—
Dual Zone Climate Control	✓	—
Extended Cabin Heating/Cooling	✓	—
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	6	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	40.2 in.	38.0 in.
Front Leg Room	46.1 in.	42.3 in.
Front Shoulder Room	58.0 in.	55.7 in.
Front Hip Room	56.6 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	37.8 in.	37.3 in.
Rear Leg Room	35.2 in.	34.4 in.
Rear Shoulder Room	56.1 in.	53.5 in.
Rear Hip Room	56.6 in.	50.9 in.
Split-Folding Rear Seatback	✓	✓
Folding Center Armrest	✓	—
Reclining Rear Seats	—	✓

Tires and Wheels

Feature	Kia	Mazda
Wheel Finish	Painted Alloy	—
Wheel Size	16 x 6.5 in	16 x 6.5 in
Tire Type	All Season	All Season
Tire Size	205/65R	205/60R16
Spare Tire Type	Temporary	Temporary
Spare Tire Location	Inside Mounted	Inside Mounted
Wheel Material	—	Alloy

Suspension

Feature	Kia	Mazda
Four-Wheel Independent Suspension	✓	—
Front Stabilizer Bar	✓	—
Rear Stabilizer Bar	✓	—
Front Suspension Type	—	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 2026 Kia K5 and 2026 Mazda 3.

How much bigger is the 2026 Kia K5 compared to the Mazda 3?

The Kia K5 is definitely the physically larger sedan; it measures 193.1 inches in length compared to the Mazda 3's 183.5 inches. This size difference translates directly into more passenger space and 2.4 cubic feet more cargo room for the Kia.

Which car has better fuel economy for commuting?

They are extremely close, both achieving 30 MPG combined. However, the Kia K5 is slightly better on the highway at 37 MPG, while the Mazda 3 has a slight edge in city driving at 27 MPG.

Is the performance difference noticeable between the two sedans?

While both use regular unleaded fuel and offer comparable power, the K5 technically leads with 191 hp versus the Mazda 3's 186 hp. Both use automatic, shiftable transmissions, but the K5 uses an 8-speed while the Mazda uses a 6-speed.

Which vehicle is the better budget choice?

The 2026 Mazda 3 offers the lower entry point with an MSRP of $24,550, making it the clear choice if upfront savings are your primary concern. The Kia K5 starts nearly $3,000 higher at $27,390.

Are either of these cars available with all-wheel drive?

Based on the specifications provided, both the standard 2026 Kia K5 and the standard 2026 Mazda 3 utilize a front-wheel drive configuration for these trims.

How does the height difference affect visibility?

This is interesting, as both sedans share the exact same height of 56.9 inches. Therefore, visibility expectations related to overall height should be identical between the K5 and the Mazda 3.