2026 Kia K5 LXS vs 2025 Nissan Altima 2.5 S
These two are closer than you would think. The data shows minimal separation. Key numbers: 191 vs 188 hp, 30 vs 31 MPG.
The spec table compares 6 specifications head to head.
Key Differences at a Glance
What's Actually Different
These two vehicles differ in 6 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 Nissan Altima 2.5 S |
|---|---|---|
| Pricing | ||
| MSRP | $27,490 | $27,000 |
| Powertrain | ||
| Engine | 2.5L I4 | 2.5L I4 |
| Horsepower | 191 hp | 188 hp |
| Torque | 181 lb-ft | 180 lb-ft |
| Transmission | 8-speed shiftable automatic | continuously variable-speed automatic |
| Drivetrain | FWD | FWD |
| Fuel Economy | ||
| City MPG | 26 | 27 |
| Highway MPG | 37 | 38 |
| Combined MPG | 30 | 31 |
| Fuel Tank | 15.8 gal | 16.2 gal |
| Annual Fuel Cost (EPA) | $1,450/yr | $1,400/yr |
| Dimensions | ||
| Curb Weight | 3,230 lbs | 3,253 lbs |
| Wheelbase | 112.2" | 111.2" |
| Length | 193.1" | 192.9" |
| Width | 73.2" | 72.9" |
| Height | 56.9" | 56.7" |
| Safety | ||
| NHTSA Overall | 5/5 stars | 5/5 stars |
| 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 Nissan Altima 2.5 S?
The 2025 Nissan Altima 2.5 S starts at $27,000, $490 less than the 2026 Kia K5 LXS at $27,490. That gap is small enough that monthly payments are nearly identical. Focus on which vehicle fits your life, not the sticker.
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 Nissan Altima 2.5 S?
The 2025 Nissan Altima 2.5 S is the stronger pick when you want to keep $490 in your pocket and the 2025 Nissan Altima 2.5 S covers your needs.
Which gets better fuel economy, the 2026 Kia K5 LXS or 2025 Nissan Altima 2.5 S?
The 2025 Nissan Altima 2.5 S rates 31 combined MPG, 1 MPG ahead.
Which is more powerful, the 2026 Kia K5 LXS or 2025 Nissan Altima 2.5 S?
The 2026 Kia K5 LXS produces 191 hp, 3 more than the 2025 Nissan Altima 2.5 S at 188 hp. The 2026 Kia K5 LXS also leads in torque at 181 lb-ft vs 180 lb-ft.
Is the 2026 Kia K5 LXS bigger than the 2025 Nissan Altima 2.5 S?
The 2026 Kia K5 LXS is 0.2″ longer at 193.1″ vs 192.9″. The 2026 Kia K5 LXS has a 1.0″ 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 Nissan Altima 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, Nissan trims, Nissan Altima trims
- 2026 Kia K5 LXS Safety Ratings (NHTSA)
- 2025 Nissan Altima 2.5 S Safety Ratings (NHTSA)
- Compare Fuel Economy (EPA)
K5 vs Altima: What This Matchup Is Really About
The 2026 Kia K5 LXS and 2025 Nissan Altima 2.5 S are both midsize sedans competing for the same buyer. Price, fuel economy, and daily comfort are the tie-breakers. The $-490 price gap works out to less than $10/month on a typical loan, so the cost difference is negligible. Pick on fit, not on price.
Under the Hood
Both run the same 2.5L I4 engine. The 3 hp difference (191 vs 188) is marginal in daily driving. Both use FWD.
Running Costs: K5 vs Altima
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 Nissan Altima 2.5 S when you want to keep $490 in your pocket and the 2025 Nissan Altima 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 Nissan or any dealership.