BMW X4 trim comparison
2025 BMW X4 xDrive30i vs M40i
The X4 xDrive30i starts at $55,300 while the M40i is $66,700. That $11,400 gap buys 6 meaningful differences.
This trim jump changes the engine from 2.0L I4 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 xDrive30i if the 2.0L I4 Turbo already feels sufficient for the way you drive. Step up to the M40i only when the 3.0L I6 mild-hybrid Turbo powertrain is the reason you are moving higher in the lineup.
The cleanest way to feel this upgrade is through the payment: about $201/month more over 60 months, or roughly $12,060 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 xDrive30i and M40i share the same 8-speed shiftable automatic transmission and identical wheelbase and body dimensions.
The upgrade math
You are paying $11,400 for 5 measurable differences, which works out to about $2,280 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 | xDrive30i | M40i |
|---|---|---|
| Pricing | ||
| MSRP | $55,300 | $66,700 |
| Powertrain | ||
| Engine | 2.0L I4 Turbo | 3.0L I6 mild-hybrid Turbo |
| Horsepower | 248 hp | 382 hp |
| Torque | 258 lb-ft | 369 lb-ft |
| Transmission | 8-speed shiftable automatic | 8-speed shiftable automatic |
| Drivetrain | AWD | AWD |
| Fuel Economy | ||
| City MPG | 21 | 22 |
| Highway MPG | 27 | 26 |
| Combined MPG | 24 | 23 |
| Fuel Tank | 17.2 gal | 17.2 gal |
| Annual Fuel Cost (EPA) | $2,400/yr | No published data |
| Dimensions | ||
| Curb Weight | 4,178 lbs | 4,403 lbs |
| Wheelbase | 112.8" | 112.8" |
| Length | 187.6" | 187.5" |
| Width | 75.5" | 76.3" |
| Height | 63.8" | 63.8" |
| 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 X4 xDrive30i vs M40i Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the BMW X4 lineup, the BMW brand hub, the Compact SUVs, 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 X4 M40i cost than the xDrive30i?
The M40i starts at $66,700 compared to $55,300 for the xDrive30i. That is a $11,400 difference, or approximately $201/month more on a 60-month loan.
Do the 2025 BMW X4 xDrive30i and M40i have the same engine?
No. The xDrive30i uses a 2.0L I4 Turbo (248 hp, 258 lb-ft), while the M40i has the 3.0L I6 mild-hybrid Turbo (382 hp, 369 lb-ft). That is 134 more horsepower. Both pair with the same 8-speed shiftable automatic.
Do the 2025 X4 xDrive30i and M40i have the same drivetrain?
Yes. Both come with AWD as standard. The differences between these trims are in features and equipment, not drivetrain.
What warranty does the 2025 BMW X4 come with?
All 2025 BMW X4 trims, including both the xDrive30i and M40i, 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 X4 M40i worth $11,400 more than the xDrive30i?
The $11,400 buys the 3.0L I6 mild-hybrid Turbo. If that powertrain matters for how you drive, yes. If not, the xDrive30i does the same job for less.
Which 2025 BMW X4 trim gets better fuel economy, the xDrive30i or the M40i?
The xDrive30i is the more efficient of the two at 24 combined MPG, versus 23 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 X4 M40i Worth $11,400 More?
The X4 M40i costs $11,400 more than the xDrive30i. Whether that is worth it depends on how much you value the 3.0L I6 mild-hybrid Turbo engine (+134 hp). Power and comfort matter differently to different buyers. Weigh them against your priorities.
The Differences You'll Notice Most
Engine changes between these trims: the xDrive30i has the 2.0L I4 Turbo, the M40i the 3.0L I6 mild-hybrid Turbo. That means 134 more horsepower and 111 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 X4 xDrive30i gets 1 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $76 per year or $380 over five years of ownership.
Bottom Line
$11,400 more for the X4 M40i gets you 5 real differences. At $201/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 X4 xDrive30i
Value-trim add-onsThese picks fit the xDrive30i best when the goal is covering the daily-use gaps without paying up to the next trim.
BMW X4 M40i
Step-up trim add-onsThese picks suit the M40i when you want the accessories to match the nicer cabin, broader utility, or more premium use case.
As an Amazon Associate, TrimAtlas earns from qualifying purchases.
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.