BMW 3 Series trim comparison
2024 BMW 3 Series M340i vs M3 Competition
The 3 Series M340i starts at $57,600 while the M3 Competition is $80,200. That $22,600 gap buys 6 meaningful differences.
This trim jump changes the engine from 3.0L I6 mild-hybrid Turbo to 3.0L I6 Turbo. Everything else is secondary to whether that powertrain difference matters for how you drive.
If you would notice the 3.0L I6 Turbo every week, the M3 Competition makes sense. If not, the M340i 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 $398/month more over 60 months, or roughly $23,880 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
Same platform and drivetrain options on both trims.
The upgrade math
You are paying $22,600 for 5 measurable differences, which works out to about $4,520 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 | M340i | M3 Competition |
|---|---|---|
| Pricing | ||
| MSRP | $57,600 | $80,200 |
| Powertrain | ||
| Engine | 3.0L I6 mild-hybrid Turbo | 3.0L I6 Turbo |
| Horsepower | 382 hp | 503 hp |
| Torque | 369 lb-ft | 479 lb-ft |
| Transmission | 8-speed shiftable automatic | 8-speed automatic |
| Drivetrain | RWD | RWD |
| Fuel Economy | ||
| City MPG | 23 | 16 |
| Highway MPG | 31 | 23 |
| Combined MPG | 26 | 19 |
| Fuel Tank | 15.6 gal | 15.6 gal |
| Annual Fuel Cost (EPA) | $2,250/yr | No published data |
| Dimensions | ||
| Curb Weight | 3,834 lbs | 3,890 lbs |
| Wheelbase | 112.2" | 112.5" |
| Length | 185.9" | 189.1" |
| Width | 71.9" | 74.3" |
| Height | 56.4" | 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 M340i vs M3 Competition 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 M3 Competition cost than the M340i?
The M3 Competition starts at $80,200 compared to $57,600 for the M340i. That is a $22,600 difference, or approximately $398/month more on a 60-month loan.
Do the 2024 BMW 3 Series M340i and M3 Competition have the same engine?
No. The M340i uses a 3.0L I6 mild-hybrid Turbo (382 hp, 369 lb-ft), while the M3 Competition has the 3.0L I6 Turbo (503 hp, 479 lb-ft). That is 121 more horsepower. Both pair with the same 8-speed shiftable automatic.
Do the 2024 3 Series M340i and M3 Competition 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 2024 BMW 3 Series come with?
All 2024 BMW 3 Series trims, including both the M340i and M3 Competition, 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 M3 Competition worth $22,600 more than the M340i?
The $22,600 buys the 3.0L I6 Turbo. If that powertrain matters for how you drive, yes. If not, the M340i does the same job for less.
Which 2024 BMW 3 Series trim gets better fuel economy, the M340i or the M3 Competition?
The M340i is the more efficient of the two at 26 combined MPG, versus 19 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 3 Series M3 Competition Worth $22,600 More?
At $22,600 more, the 3 Series M3 Competition adds the 3.0L I6 Turbo engine (+121 hp). This is a situational call. If those features are on your must-have list, the upgrade makes sense. If not, the M340i delivers the same core 3 Series experience for less.
The Differences You'll Notice Most
Engine changes between these trims: the M340i has the 3.0L I6 mild-hybrid Turbo, the M3 Competition the 3.0L I6 Turbo. That means 121 more horsepower and 110 more lb-ft of torque. You will notice it most when merging, passing, or climbing at speed. In return, expect about 7 fewer combined MPG.
Fuel Economy Comparison
The 3 Series M340i gets 7 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $596 per year or $2,980 over five years of ownership.
Bottom Line
The 3 Series M3 Competition costs $22,600 more than the M340i (about $398/month more on a 60-month loan). That buys 5 meaningful changes at $4,520 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 M340i
Value-trim add-onsThese picks fit the M340i best when the goal is covering the daily-use gaps without paying up to the next trim.
BMW 3 Series M3 Competition
Step-up trim add-onsThese picks suit the M3 Competition 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.