2026 Kia K5 LXS vs 2025 Mazda 3 2.5 S
9.6″ longer vs $3,340 less. That is the real fork. Key numbers: 191 vs 191 hp, 30 vs 31 MPG.
The K5 LXS leads on 9.6″ longer. The 3 2.5 S leads on $3,340 less. The spec table compares 4 specifications head to head.
Key Differences at a Glance
What's Actually Different
These two vehicles differ in 4 specifications.
Full Specification Comparison
Specifications and pricing reflect available data as of early 2026 and may not match current manufacturer figures. Always confirm details with an authorized dealer before making a purchase decision.
| Spec | 2026 Kia K5 LXS | 2025 Mazda 3 2.5 S |
|---|---|---|
| Pricing | ||
| MSRP | $27,490 | $24,150 |
| Powertrain | ||
| Engine | 2.5L I4 | 2.5L I4 |
| Horsepower | 191 hp | 191 hp |
| Torque | 181 lb-ft | 186 lb-ft |
| Transmission | 8-speed shiftable automatic | 6-speed shiftable automatic |
| Drivetrain | FWD | FWD |
| Fuel Economy | ||
| City MPG | 26 | 27 |
| Highway MPG | 37 | 37 |
| Combined MPG | 30 | 31 |
| Fuel Tank | 15.8 gal | 13.2 gal |
| Annual Fuel Cost (EPA) | $1,450/yr | No published data |
| Dimensions | ||
| Curb Weight | 3,230 lbs | 3,124 lbs |
| Wheelbase | 112.2" | 107.3" |
| Length | 193.1" | 183.5" |
| Width | 73.2" | 70.7" |
| Height | 56.9" | 56.9" |
| Safety | ||
| NHTSA Overall | 5/5 stars | No published data |
| IIHS Award | No published data | TSP+ |
| Warranty | ||
| Bumper-to-Bumper | 5yr/60k | 3yr/36k |
| Powertrain | 10yr/100k | 5yr/60k |
| Corrosion | 5yr/100k | 5yr/unlimited |
| Roadside Assistance | 5yr/60k | 3yr/36k |
Frequently Asked Questions
What is the price difference between the 2026 Kia K5 LXS and 2025 Mazda 3 2.5 S?
The 2025 Mazda 3 2.5 S starts at $24,150, $3,340 less than the 2026 Kia K5 LXS at $27,490. On a 60-month loan that is roughly $59/month. All prices are MSRP before destination and dealer fees.
Who should choose the 2026 Kia K5 LXS?
The 2026 Kia K5 LXS is the stronger pick when you prefer the Kia approach to the midsize sedan segment.
Who should choose the 2025 Mazda 3 2.5 S?
The 2025 Mazda 3 2.5 S is the stronger pick when you want to keep $3,340 in your pocket and the 2025 Mazda 3 2.5 S covers your needs.
Which gets better fuel economy, the 2026 Kia K5 LXS or 2025 Mazda 3 2.5 S?
The 2025 Mazda 3 2.5 S rates 31 combined MPG, 1 MPG ahead.
Which is more powerful, the 2026 Kia K5 LXS or 2025 Mazda 3 2.5 S?
Both produce 191 hp. The 2025 Mazda 3 2.5 S also leads in torque at 186 lb-ft vs 181 lb-ft.
Is the 2026 Kia K5 LXS bigger than the 2025 Mazda 3 2.5 S?
The 2026 Kia K5 LXS is 9.6″ longer at 193.1″ vs 183.5″. The 2026 Kia K5 LXS has a 4.9″ longer wheelbase, which typically means more rear-seat legroom.
How do the warranties compare?
The Kia K5 comes with 5yr/60k bumper-to-bumper and 10yr/100k powertrain. The Mazda 3 offers 3yr/36k bumper-to-bumper and 5yr/60k powertrain. Longer warranty coverage can offset higher maintenance costs over time.
Explore more: Kia trims, Kia K5 trims, Mazda trims, Mazda 3 trims
- 2026 Kia K5 LXS Safety Ratings (NHTSA)
- 2025 Mazda 3 2.5 S Safety Ratings (NHTSA)
- Compare Fuel Economy (EPA)
K5 vs 3: What This Matchup Is Really About
The 2026 Kia K5 LXS and 2025 Mazda 3 2.5 S are both midsize sedans competing for the same buyer. Price, fuel economy, and daily comfort are the tie-breakers. The $-3,340 gap adds up to $59/month on a 60-month loan. That is real money, so the pricier option needs to earn it with capabilities you will actually use.
Under the Hood
Both run the same 2.5L I4 engine. Both produce 191 hp. Both use FWD.
Running Costs: K5 vs 3
Annual fuel costs are nearly identical, so running costs will not separate these two.
Bottom Line
Choose the 2026 Kia K5 LXS when you prefer the Kia approach to the midsize sedan segment. Choose the 2025 Mazda 3 2.5 S when you want to keep $3,340 in your pocket and the 2025 Mazda 3 2.5 S covers your needs.
Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material. Actual pricing, features, and availability may vary by region and dealer. Always confirm details with an authorized dealer before making a purchase decision. TrimAtlas is not affiliated with Kia or Mazda or any dealership.