Honda Civic trim comparison
2024 Honda Civic LX vs Si
The Civic LX starts at $23,950 while the Si is $29,100. That $5,150 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.
If you would notice the 1.5L I4 Turbo every week, the Si makes sense. If not, the LX is the cleaner stop because this jump matters for the powertrain first and the trim badge second.
The cleanest way to feel this upgrade is through the payment: about $90/month more over 60 months, or roughly $5,400 extra all-in once interest is included. If that different powertrain is not part of your real use case, the cheaper trim keeps more money in your pocket without changing the core experience you need.
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
The LX and Si are mechanically identical where it counts: the same identical wheelbase and body dimensions.
The upgrade math
You are paying $5,150 for 5 measurable differences, which works out to about $1,030 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 2024. Confirm details with an authorized dealer before purchasing.
| Spec | LX | Si |
|---|---|---|
| Pricing | ||
| MSRP | $23,950 | $29,100 |
| Powertrain | ||
| Engine | 2.0L I4 | 1.5L I4 Turbo |
| Horsepower | 158 hp | 200 hp |
| Torque | 138 lb-ft | 192 lb-ft |
| Transmission | continuously variable-speed automatic | 6-speed manual |
| Drivetrain | FWD | FWD |
| Fuel Economy | ||
| City MPG | 31 | 27 |
| Highway MPG | 40 | 37 |
| Combined MPG | 35 | 31 |
| Fuel Tank | 12.4 gal | 12.4 gal |
| Dimensions | ||
| Curb Weight | 2,877 lbs | 2,952 lbs |
| Wheelbase | 107.7" | 107.7" |
| Length | 184.0" | 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.
2024 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 2024 Civic Si cost than the LX?
The Si starts at $29,100 compared to $23,950 for the LX. That is a $5,150 difference, or approximately $90/month more on a 60-month loan.
Do the 2024 Honda Civic LX and Si have the same engine?
No. The LX uses a 2.0L I4 (158 hp, 138 lb-ft), while the Si has the 1.5L I4 Turbo (200 hp, 192 lb-ft). That is 42 more horsepower. Both pair with the same continuously variable-speed automatic.
Do the 2024 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 2024 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 2024 Honda Civic come with?
All 2024 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 2024 Honda Civic Si worth $5,150 more than the LX?
The $5,150 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 2024 Honda Civic trim gets better fuel economy, the LX or the Si?
The LX is the more efficient of the two at 35 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 $5,150 More?
Spending $5,150 more on the Civic Si buys the 1.5L I4 Turbo engine (+42 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 42 more horsepower and 54 more lb-ft of torque. Enough to notice on highway on-ramps and during passing maneuvers. In return, expect about 4 fewer combined MPG.
Fuel Economy Comparison
The Civic LX gets 4 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $155 per year or $775 over five years of ownership.
Bottom Line
The Civic Si costs $5,150 more than the LX (about $90/month more on a 60-month loan). That buys 5 meaningful changes at $1,030 per change. Whether that trade-off is worth it depends on which features matter to your daily driving.
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 2024 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.