BMW 4 Series trim comparison
2025 BMW 4 Series 430i vs M440i
The 4 Series 430i starts at $51,150 while the M440i is $64,850. That $13,700 gap buys 5 meaningful differences.
This trim jump changes the engine from 2.0L I4 mild-hybrid Turbo to 3.0L I6 mild-hybrid Turbo. Everything else is secondary to whether that powertrain difference matters for how you drive.
Start with the 430i if the 2.0L I4 mild-hybrid Turbo already feels sufficient for the way you drive. Step up to the M440i only when the 3.0L I6 mild-hybrid Turbo powertrain is the reason you are moving higher in the lineup.
If you are budgeting this move monthly, the jump from the 430i to the M440i is about $241/month on a 60-month loan at 6.5% APR with 10% down. That works out to roughly $14,460 more by the time interest is counted. 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 430i and M440i share the same 8-speed shiftable automatic transmission and identical wheelbase and body dimensions.
The upgrade math
You are paying $13,700 for 4 measurable differences, which works out to about $3,425 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. 5 specification differences, 1 shared.
Full Specification Comparison
Specifications reflect available data as of early 2025. Confirm details with an authorized dealer before purchasing.
| Spec | 430i | M440i |
|---|---|---|
| Pricing | ||
| MSRP | $51,150 | $64,850 |
| Powertrain | ||
| Engine | 2.0L I4 mild-hybrid Turbo | 3.0L I6 mild-hybrid Turbo |
| Horsepower | 255 hp | 386 hp |
| Torque | 295 lb-ft | 398 lb-ft |
| Transmission | 8-speed shiftable automatic | 8-speed shiftable automatic |
| Drivetrain | RWD | RWD |
| Fuel Economy | ||
| City MPG | 28 | 27 |
| Highway MPG | 36 | 34 |
| Combined MPG | 31 | 30 |
| Fuel Tank | 15.5 gal | 15.5 gal |
| Dimensions | ||
| Curb Weight | 3,677 lbs | No published data |
| Wheelbase | 112.2" | 112.2" |
| Length | 187.9" | 188.0" |
| Width | 72.9" | 72.9" |
| Height | 54.6" | 54.6" |
| Warranty | ||
| Bumper-to-Bumper | 4yr/50k | 4yr/50k |
| Powertrain | 4yr/50k | 4yr/50k |
| Corrosion | 12yr/unlimited | 12yr/unlimited |
| Roadside Assistance | 4yr/unlimited | 4yr/unlimited |
Data sources: licensed third-party automotive data, EPA fueleconomy.gov, NHTSA, and official manufacturer materials. Values marked est. are estimated.
2025 BMW 4 Series 430i vs M440i Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the BMW 4 Series lineup, the BMW 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 4 Series M440i cost than the 430i?
The M440i starts at $64,850 compared to $51,150 for the 430i. That is a $13,700 difference, or approximately $241/month more on a 60-month loan.
Do the 2025 BMW 4 Series 430i and M440i have the same engine?
No. The 430i uses a 2.0L I4 mild-hybrid Turbo (255 hp, 295 lb-ft), while the M440i has the 3.0L I6 mild-hybrid Turbo (386 hp, 398 lb-ft). That is 131 more horsepower. Both pair with the same 8-speed shiftable automatic.
Do the 2025 4 Series 430i and M440i have the same drivetrain?
Yes. Both come with RWD as standard. The differences between these trims are in features and equipment, not drivetrain.
What warranty does the 2025 BMW 4 Series come with?
All 2025 BMW 4 Series trims, including both the 430i and M440i, come with BMW's standard warranty: 4yr/50k bumper-to-bumper and 4yr/50k powertrain coverage. Warranty does not vary by trim level.
Is the 2025 BMW 4 Series M440i worth $13,700 more than the 430i?
The $13,700 buys the 3.0L I6 mild-hybrid Turbo. If that powertrain matters for how you drive, yes. If not, the 430i does the same job for less.
Which 2025 BMW 4 Series trim gets better fuel economy, the 430i or the M440i?
The 430i is the more efficient of the two at 31 combined MPG, versus 30 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.
What $13,700 Gets You
The 4 Series M440i costs $13,700 more than the 430i. Whether that is worth it depends on how much you value the 3.0L I6 mild-hybrid Turbo engine (+131 hp). Power and comfort matter differently to different buyers. Weigh them against your priorities.
430i vs. M440i: Day-to-Day
The M440i comes with the 3.0L I6 mild-hybrid Turbo instead of the 430i's 2.0L I4 mild-hybrid Turbo. That means 131 more horsepower and 103 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 1 fewer combined MPG.
Fuel Economy Comparison
The 4 Series 430i gets 1 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $45 per year or $225 over five years of ownership.
Summary
$13,700 more for the 4 Series M440i gets you 4 real differences. At $241/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.
BMW 4 Series 430i
Value-trim add-onsThese picks fit the 430i best when the goal is covering the daily-use gaps without paying up to the next trim.
BMW 4 Series M440i
Step-up trim add-onsThese picks suit the M440i 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 BMW or any dealership.
Page updated 2026-03-18. Verify equipment, pricing, and regional availability with the manufacturer or dealer.