BMW 4 Series trim comparison
2026 BMW 4 Series 430i vs M4
The 4 Series 430i starts at $61,300 while the M4 is $82,200. That $20,900 gap buys 6 meaningful differences.
This trim jump changes the engine from 2.0L I4 mild-hybrid Turbo to 3.0L I6 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 M4 only when the 3.0L I6 Turbo powertrain is the reason you are moving higher in the lineup.
Think about this as a monthly tradeoff, not just a sticker gap. The M4 adds about $369/month on a typical 60-month loan, or around $22,140 more overall with interest. 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
Same platform and drivetrain options on both trims.
The upgrade math
You are paying $20,900 for 5 measurable differences, which works out to about $4,180 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 2026. Confirm details with an authorized dealer before purchasing.
| Spec | 430i | M4 |
|---|---|---|
| Pricing | ||
| MSRP | $61,300 | $82,200 |
| Powertrain | ||
| Engine | 2.0L I4 mild-hybrid Turbo | 3.0L I6 Turbo |
| Horsepower | 255 hp | 473 hp |
| Torque | 295 lb-ft | 406 lb-ft |
| Transmission | 8-speed shiftable automatic | 6-speed manual |
| Drivetrain | RWD | RWD |
| Fuel Economy | ||
| City MPG | 27 | 16 |
| Highway MPG | 35 | 23 |
| Combined MPG | 30 | 19 |
| Fuel Tank | 15.6 gal | 15.6 gal |
| Dimensions | ||
| Curb Weight | 4,026 lbs | 3,829 lbs |
| Wheelbase | 112.2" | 112.5" |
| Length | 187.9" | 189.1" |
| Width | 72.9" | 74.3" |
| Height | 54.6" | 55.0" |
| 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.
2026 BMW 4 Series 430i vs M4 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 2026 4 Series M4 cost than the 430i?
The M4 starts at $82,200 compared to $61,300 for the 430i. That is a $20,900 difference, or approximately $369/month more on a 60-month loan.
Do the 2026 BMW 4 Series 430i and M4 have the same engine?
No. The 430i uses a 2.0L I4 mild-hybrid Turbo (255 hp, 295 lb-ft), while the M4 has the 3.0L I6 Turbo (473 hp, 406 lb-ft). That is 218 more horsepower. Both pair with the same 8-speed shiftable automatic.
Do the 2026 4 Series 430i and M4 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 2026 BMW 4 Series come with?
All 2026 BMW 4 Series trims, including both the 430i and M4, 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 2026 BMW 4 Series M4 worth $20,900 more than the 430i?
The $20,900 buys the 3.0L I6 Turbo. If that powertrain matters for how you drive, yes. If not, the 430i does the same job for less.
Which 2026 BMW 4 Series trim gets better fuel economy, the 430i or the M4?
The 430i is the more efficient of the two at 30 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.
Breaking Down the $20,900 Gap
The 4 Series M4 costs $20,900 more than the 430i. Whether that is worth it depends on how much you value the 3.0L I6 Turbo engine (+218 hp). Power and comfort matter differently to different buyers. Weigh them against your priorities.
How the 430i and M4 Feel Different
Moving from the 430i to the M4 means a different engine entirely. That means 218 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 11 fewer combined MPG.
Fuel Economy Comparison
The 4 Series 430i gets 11 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $811 per year or $4,055 over five years of ownership.
The Short Version
$20,900 more for the 4 Series M4 gets you 5 real differences. At $369/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 M4
Step-up trim add-onsThese picks suit the M4 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 2026 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.