Honda Civic trim comparison
2025 Honda Civic LX vs Si
The Civic LX starts at $24,250 while the Si is $30,250. That $6,000 gap buys 6 meaningful differences.
This trim jump changes the engine from 2.0L I4 to 1.5L I4 Turbo. Everything else is secondary to whether that powertrain difference matters for how you drive.
Start with the LX if the 2.0L I4 already feels sufficient for the way you drive. Step up to the Si only when the 1.5L I4 Turbo powertrain is the reason you are moving higher in the lineup.
The cleanest way to feel this upgrade is through the payment: about $106/month more over 60 months, or roughly $6,360 extra all-in once interest is included. The payment only makes sense if that different powertrain matters to the way you actually drive, tow, or live with the vehicle.
Lock one trim, change the other side, and move through exact pair pages without resetting back to the full lineup every time.
Who notices the difference
The higher trim starts to make more sense when you are specifically shopping for the stronger powertrain, not just more trim content.
When both feel the same
Both the LX and Si share the same identical wheelbase and body dimensions.
The upgrade math
You are paying $6,000 for 5 measurable differences, which works out to about $1,200 per change.
Key Differences at a Glance
This is the fast read: price, power, efficiency, and the feature flips most likely to change the answer.
Every Difference, Side by Side
This is the full read behind the quick decision signals above: the complete hardware, comfort, and equipment story. 6 specification differences, 1 shared.
Full Specification Comparison
Specifications reflect available data as of early 2025. Confirm details with an authorized dealer before purchasing.
| Spec | LX | Si |
|---|---|---|
| Pricing | ||
| MSRP | $24,250 | $30,250 |
| Powertrain | ||
| Engine | 2.0L I4 | 1.5L I4 Turbo |
| Horsepower | 150 hp | 200 hp |
| Torque | 133 lb-ft | 192 lb-ft |
| Transmission | continuously variable-speed automatic | 6-speed manual |
| Drivetrain | FWD | FWD |
| Fuel Economy | ||
| City MPG | 32 | 27 |
| Highway MPG | 41 | 37 |
| Combined MPG | 36 | 31 |
| Fuel Tank | 12.4 gal | 12.4 gal |
| Annual Fuel Cost (EPA) | No published data | $1,850/yr |
| Dimensions | ||
| Curb Weight | 2,877 lbs | 2,952 lbs |
| Wheelbase | 107.7" | 107.7" |
| Length | 184.8" | 184.0" |
| Width | 70.9" | 70.9" |
| Height | 55.7" | 55.5" |
| Safety | ||
| NHTSA Overall | 5/5 stars | 5/5 stars |
| IIHS Award | TSP+ | TSP+ |
| Warranty | ||
| Bumper-to-Bumper | 3yr/36k | 3yr/36k |
| Powertrain | 5yr/60k | 5yr/60k |
| Corrosion | 5yr/unlimited | 5yr/unlimited |
| Roadside Assistance | 3yr/36k | 3yr/36k |
Data sources: licensed third-party automotive data, EPA fueleconomy.gov, NHTSA, and official manufacturer materials. Values marked est. are estimated.
2025 Honda Civic LX vs Si Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the Honda Civic lineup, the Honda brand hub, the Compact Cars, the how to pick a trim guide, or our mid-trim value research when you need the bigger shopping path behind this one matchup.
How much more does the 2025 Civic Si cost than the LX?
The Si starts at $30,250 compared to $24,250 for the LX. That is a $6,000 difference, or approximately $106/month more on a 60-month loan.
Do the 2025 Honda Civic LX and Si have the same engine?
No. The LX uses a 2.0L I4 (150 hp, 133 lb-ft), while the Si has the 1.5L I4 Turbo (200 hp, 192 lb-ft). That is 50 more horsepower. Both pair with the same continuously variable-speed automatic.
Do the 2025 Civic LX and Si have the same drivetrain?
Yes. Both come with FWD as standard. The differences between these trims are in features and equipment, not drivetrain.
Is the 2025 Civic LX or Si safer?
Both share the same Honda Civic platform with an overall 5-star NHTSA safety rating and an IIHS TSP+ designation. Safety ratings are model-level and identical across trims. The trim choice affects comfort and features, not crash protection.
What warranty does the 2025 Honda Civic come with?
All 2025 Honda Civic trims, including both the LX and Si, come with Honda's standard warranty: 3yr/36k bumper-to-bumper and 5yr/60k powertrain coverage. Warranty does not vary by trim level.
Is the 2025 Honda Civic Si worth $6,000 more than the LX?
The $6,000 buys the 1.5L I4 Turbo. If that powertrain matters for how you drive, yes. If not, the LX does the same job for less.
Which 2025 Honda Civic trim gets better fuel economy, the LX or the Si?
The LX is the more efficient of the two at 36 combined MPG, versus 31 for the other trim. That matters most if you are balancing running costs against the extra power, drivetrain, or comfort equipment tied to the pricier trim.
The Full Story Behind This Price Gap
Use the direct answer above for this exact matchup, then use these guides to understand whether you are really looking at a feature step-up, a package shuffle, or the point where the lineup starts changing in a meaningful way.
Is the Civic Si Worth $6,000 More?
Spending $6,000 more on the Civic Si buys the 1.5L I4 Turbo engine (+50 hp). These are the kind of differences you notice every time you drive.
The Differences You'll Notice Most
Engine changes between these trims: the LX has the 2.0L I4, the Si the 1.5L I4 Turbo. That means 50 more horsepower and 59 more lb-ft of torque. That extra power shows up most clearly once you are out of town and asking more of the drivetrain. The cost of that extra capability is roughly 5 fewer combined MPG.
Fuel Economy Comparison
The Civic LX gets 5 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $188 per year or $940 over five years of ownership.
Bottom Line
$6,000 more for the Civic Si gets you 5 real differences. At $106/month more, the question is whether those specific changes are things you will use regularly.
Trim-Matched Accessories
These add-ons are split by trim intent so the recommendations follow the actual use case, not just the same repeated product block.
Honda Civic LX
Value-trim add-onsThese picks fit the LX best when the goal is covering the daily-use gaps without paying up to the next trim.
Honda Civic Si
Step-up trim add-onsThese picks suit the Si when you want the accessories to match the nicer cabin, broader utility, or more premium use case.
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Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material for the 2025 model year. 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 Honda or any dealership.
Page updated 2026-03-18. Verify equipment, pricing, and regional availability with the manufacturer or dealer.