BMW 4 Series trim comparison
2025 BMW 4 Series M440i vs M4 CS
The 4 Series M440i starts at $64,850 while the M4 CS is $123,500. That $58,650 gap buys 7 meaningful differences.
This is a powertrain and drivetrain change. The M4 CS gets the 3.0L I6 Turbo and AWD, so the $58,650 is buying a different driving experience, not just nicer trim.
Choose the M440i if the 3.0L I6 mild-hybrid Turbo with RWD already covers the way you drive. Move to the M4 CS only when the 3.0L I6 Turbo and AWD combo is the reason you are shopping higher, because that is the real hardware split here.
The cleanest way to feel this upgrade is through the payment: about $1033/month more over 60 months, or roughly $61,980 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 M440i and M4 CS share the same 8-speed shiftable automatic transmission.
The upgrade math
You are paying $58,650 for 6 measurable differences, which works out to about $9,775 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 2025. Confirm details with an authorized dealer before purchasing.
| Spec | M440i | M4 CS |
|---|---|---|
| Pricing | ||
| MSRP | $64,850 | $123,500 |
| Powertrain | ||
| Engine | 3.0L I6 mild-hybrid Turbo | 3.0L I6 Turbo |
| Horsepower | 386 hp | 543 hp |
| Torque | 398 lb-ft | 479 lb-ft |
| Transmission | 8-speed shiftable automatic | 8-speed shiftable automatic |
| Drivetrain | RWD | AWD |
| Fuel Economy | ||
| City MPG | 27 | 16 |
| Highway MPG | 34 | 23 |
| Combined MPG | 30 | 18 |
| Fuel Tank | 15.5 gal | 15.6 gal |
| Dimensions | ||
| Curb Weight | No published data | 3,902 lbs |
| Wheelbase | 112.2" | 112.5" |
| Length | 188.0" | 189.0" |
| Width | 72.9" | 75.5" |
| Height | 54.6" | 55.1" |
| 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 M440i vs M4 CS 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 M4 CS cost than the M440i?
The M4 CS starts at $123,500 compared to $64,850 for the M440i. That is a $58,650 difference, or approximately $1033/month more on a 60-month loan.
Do the 2025 BMW 4 Series M440i and M4 CS have the same engine?
No. The M440i uses a 3.0L I6 mild-hybrid Turbo (386 hp, 398 lb-ft), while the M4 CS has the 3.0L I6 Turbo (543 hp, 479 lb-ft). That is 157 more horsepower. Both pair with the same 8-speed shiftable automatic.
Does the 2025 4 Series M440i come with AWD?
No. The M440i comes standard with RWD while the M4 CS has AWD. This affects traction, fuel economy, and curb weight.
What warranty does the 2025 BMW 4 Series come with?
All 2025 BMW 4 Series trims, including both the M440i and M4 CS, 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 M4 CS worth $58,650 more than the M440i?
The M4 CS changes both the engine and drivetrain for $58,650 more. That is a hardware upgrade, not just a feature bump.
Which 2025 BMW 4 Series trim gets better fuel economy, the M440i or the M4 CS?
The M440i is the more efficient of the two at 30 combined MPG, versus 18 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 4 Series M4 CS Worth $58,650 More?
The 4 Series M4 CS costs $58,650 more than the M440i. Whether that is worth it depends on how much you value the 3.0L I6 Turbo engine (+157 hp) and AWD. 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 M440i has the 3.0L I6 mild-hybrid Turbo, the M4 CS the 3.0L I6 Turbo. That means 157 more horsepower and 81 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 12 fewer combined MPG. The M4 CS has AWD while the M440i has RWD. This affects traction, weight, and fuel economy.
Fuel Economy Comparison
The 4 Series M440i gets 12 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $933 per year or $4,665 over five years of ownership.
Bottom Line
$58,650 more for the 4 Series M4 CS gets you 6 real differences. At $1,033/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 M440i
Value-trim add-onsThese picks fit the M440i best when the goal is covering the daily-use gaps without paying up to the next trim.
BMW 4 Series M4 CS
Step-up trim add-onsThese picks suit the M4 CS 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.