BMW 3 Series trim comparison
2024 BMW 3 Series 330i xDrive vs M340i
The 3 Series 330i xDrive starts at $46,500 while the M340i is $57,600. That $11,100 gap buys 7 meaningful differences.
This is a powertrain and drivetrain change. The M340i gets the 3.0L I6 mild-hybrid Turbo and RWD, so the $11,100 is buying a different driving experience, not just nicer trim.
This is a real hardware fork, not just a trim-label shuffle. The 330i xDrive is enough if the 2.0L I4 Turbo with AWD already fits your routine; the M340i only earns the jump when the 3.0L I6 mild-hybrid Turbo and RWD setup is the point of the upgrade.
If you are budgeting this move monthly, the jump from the 330i xDrive to the M340i is about $195/month on a 60-month loan at 6.5% APR with 10% down. That works out to roughly $11,700 more by the time interest is counted. 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 330i xDrive and M340i are mechanically identical where it counts: the same 8-speed shiftable automatic transmission and identical wheelbase and body dimensions.
The upgrade math
You are paying $11,100 for 6 measurable differences, which works out to about $1,850 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. 7 specification differences, 0 shared.
Full Specification Comparison
Specifications reflect available data as of early 2024. Confirm details with an authorized dealer before purchasing.
| Spec | 330i xDrive | M340i |
|---|---|---|
| Pricing | ||
| MSRP | $46,500 | $57,600 |
| Powertrain | ||
| Engine | 2.0L I4 Turbo | 3.0L I6 mild-hybrid Turbo |
| Horsepower | 255 hp | 382 hp |
| Torque | 295 lb-ft | 369 lb-ft |
| Transmission | 8-speed shiftable automatic | 8-speed shiftable automatic |
| Drivetrain | AWD | RWD |
| Fuel Economy | ||
| City MPG | 24 | 23 |
| Highway MPG | 33 | 31 |
| Combined MPG | 27 | 26 |
| Fuel Tank | 15.6 gal | 15.6 gal |
| Annual Fuel Cost (EPA) | No published data | $2,250/yr |
| Dimensions | ||
| Curb Weight | 3,671 lbs | 3,834 lbs |
| Wheelbase | 112.2" | 112.2" |
| Length | 185.9" | 185.9" |
| Width | 71.9" | 71.9" |
| Height | 57.0" | 56.4" |
| 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.
2024 BMW 3 Series 330i xDrive vs M340i Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the BMW 3 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 2024 3 Series M340i cost than the 330i xDrive?
The M340i starts at $57,600 compared to $46,500 for the 330i xDrive. That is a $11,100 difference, or approximately $195/month more on a 60-month loan.
Do the 2024 BMW 3 Series 330i xDrive and M340i have the same engine?
No. The 330i xDrive uses a 2.0L I4 Turbo (255 hp, 295 lb-ft), while the M340i has the 3.0L I6 mild-hybrid Turbo (382 hp, 369 lb-ft). That is 127 more horsepower. Both pair with the same 8-speed shiftable automatic.
Does the 2024 3 Series 330i xDrive come with RWD?
No. The 330i xDrive comes standard with AWD while the M340i has RWD. This affects traction, fuel economy, and curb weight.
What warranty does the 2024 BMW 3 Series come with?
All 2024 BMW 3 Series trims, including both the 330i xDrive and M340i, 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 2024 BMW 3 Series M340i worth $11,100 more than the 330i xDrive?
The M340i changes both the engine and drivetrain for $11,100 more. That is a hardware upgrade, not just a feature bump.
Which 2024 BMW 3 Series trim gets better fuel economy, the 330i xDrive or the M340i?
The 330i xDrive is the more efficient of the two at 27 combined MPG, versus 26 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 $11,100 Gets You
The 3 Series M340i is a clear upgrade over the 330i xDrive. The $11,100 price increase gets you the 3.0L I6 mild-hybrid Turbo engine (+127 hp) and RWD -- real functional changes, not just cosmetics.
330i xDrive vs. M340i: Day-to-Day
The M340i comes with the 3.0L I6 mild-hybrid Turbo instead of the 330i xDrive's 2.0L I4 Turbo. That means 127 more horsepower and 74 more lb-ft of torque. You will notice it most when merging, passing, or climbing at speed. In return, expect about 1 fewer combined MPG. The M340i drops to RWD from the 330i xDrive's AWD. Less traction capability, but potentially better fuel economy.
Fuel Economy Comparison
The 3 Series 330i xDrive gets 1 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $59 per year or $295 over five years of ownership.
Summary
The 3 Series M340i costs $11,100 more than the 330i xDrive (about $195/month more on a 60-month loan). That buys 6 meaningful changes at $1,850 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.
BMW 3 Series 330i xDrive
Value-trim add-onsThese picks fit the 330i xDrive best when the goal is covering the daily-use gaps without paying up to the next trim.
BMW 3 Series M340i
Step-up trim add-onsThese picks suit the M340i 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 BMW or any dealership.
Page updated 2026-03-18. Verify equipment, pricing, and regional availability with the manufacturer or dealer.