2026 BMW 3 Series Trims and Pricing: 330i vs. M340i

The 2026 BMW 3 Series Sedan is offered in four configurations built around two engines. The 330i and 330i xDrive use a 2.0-liter BMW TwinPower Turbo inline-4 producing 255 horsepower and 295 lb-ft of torque. The M340i and M340i xDrive step up to a 3.0-liter BMW M TwinPower Turbo inline-6 rated at 386 horsepower and 398 lb-ft of torque. Both engines pair a 48-volt mild-hybrid system with an 8-speed Steptronic automatic transmission. Rear-wheel drive is standard across the lineup, and BMW xDrive all-wheel drive is available on either engine.

What Engines Are Available in the 2026 BMW 3 Series Trims?

The base 2.0-liter turbocharged four-cylinder is the volume choice, and its 48-volt mild-hybrid system aids off-the-line responsiveness while smoothing auto start-stop transitions in city driving. For most drivers it delivers the balance of daily usability and athletic response the 3 Series is known for.

Upgrading to the M340i introduces the B58 3.0-liter inline-6, enhanced with M Performance tuning. With 386 horsepower and 398 lb-ft of torque, it adds 131 horsepower and 103 lb-ft over the 330i while remaining a comfortable daily driver. That gap in output is the clearest dividing line in the lineup, and it is what separates the two price tiers.

Whether you prefer the balanced daily power of the four-cylinder or the aggressive output of the inline-six, getting behind the wheel reveals how each engine behaves under real-world conditions. You can visit our showroom on Adams Street to compare both powertrains in person, or call our team to ask about current availability.

What Is the Starting MSRP for Each 2026 BMW 3 Series Trim?

The 2026 BMW 330i starts at an MSRP of $49,350. Moving to all-wheel drive raises the 330i xDrive to an MSRP of $51,350, while the performance-focused M340i starts at an MSRP of $63,650 and the M340i xDrive reaches an MSRP of $65,650.

Standard equipment on the base 330i includes full LED exterior lighting, power-adjustable front sport seats, SensaTec upholstery, dual-zone automatic climate control, and the BMW Curved Display. Because the entry trim comes factory-equipped with the core hardware that defines the car, many buyers find the base configuration satisfies both luxury and driving requirements without additional option packages.

For shoppers evaluating total cost of ownership, package selection is the main variable in final pricing. The M Sport Package and the Driving Assistant Professional package are the two most commonly added. Value-conscious drivers weighing recent model years alongside current inventory can also browse our pre-owned vehicle inventory.

Manufacturer’s Suggested Retail Price (MSRP) for new vehicles includes manufacturer and distributor options and delivery, process and handling fees, which may be subject to change at any time. MSRP excludes taxes, title, license and dealer installed options, accessories, fees and charges. MSRP is not the dealer advertised price. Dealer price will vary. The dealer sets the final price.

Is All-Wheel Drive Available Across All 2026 BMW 3 Series Models?

BMW offers its intelligent xDrive all-wheel-drive system across every 2026 BMW 3 Series configuration as an available option. Selecting xDrive adds $2,000 to MSRP over the rear-wheel-drive version of the same trim, on both the 330i and the M340i.

Under normal driving conditions the system maintains a rear-wheel bias to preserve the classic sports sedan steering feel, then routes power toward the wheels with the best grip when traction drops — such as during sudden rainstorms or on the foothill routes around Corona near the Santa Ana Mountains.

Rear-wheel drive remains the preferred choice for enthusiasts seeking traditional sports sedan dynamics and slightly lighter curb weight. All-wheel drive adds all-weather confidence without penalizing handling precision. Shoppers comparing the two can explore our full new BMW inventory to see both drivetrains side by side.

How Do Power, Acceleration, and Fuel Economy Compare Across Trims?

The 330i reaches 60 mph in approximately 5.6 seconds and carries EPA-Estimated ratings of 28 mpg city and 35 mpg highway. Adding xDrive quickens the 330i to approximately 5.4 seconds with EPA-Estimated ratings of 26 mpg city and 34 mpg highway. The M340i xDrive is the quickest configuration short of an M3, reaching 60 mph in approximately 4.1 seconds while still returning EPA-Estimated ratings of 26 mpg city and 33 mpg highway.

The efficiency story is the surprise in this lineup. The M340i carries EPA-Estimated ratings of 27 mpg city and 33 mpg highway despite producing 131 more horsepower than the 330i, which means stepping up to the inline-six costs far less at the pump than the power difference suggests.

EPA-estimated fuel economy figures are for comparison purposes only. Your actual mileage will vary depending on driving conditions, how you drive and maintain your vehicle, battery age/condition, and other factors.

What Equipment Differs Between the 330i and the M340i?

Every 2026 BMW 3 Series features the BMW Curved Display, combining a 12.3-inch digital instrument cluster and a 14.9-inch central touchscreen into a single swept glass surface angled toward the driver. Running BMW Operating System 8.5, the system provides customizable menu widgets, cloud-based navigation, and native voice command. Wireless Apple CarPlay, wireless Android Auto, a wireless charging tray, and BMW Digital Key are standard on all four configurations.

Driver assistance is where the trims separate. Blind-spot monitoring and lane-departure warning are standard on the M340i, but on the 330i they arrive as part of the optional Convenience Package rather than as standard equipment. Shoppers cross-shopping the two trims should price that package into a 330i comparison.

The optional Driving Assistant Professional package is available on either trim and adds Active Cruise Control with Stop and Go, Active Lane Keeping Assistant with side collision avoidance, Traffic Jam Assistant, Evasion Aid, and Cross-Traffic alert. Traffic Jam Assistant permits hands-free driving at speeds up to 40 mph on controlled-access highways. A surround-view 3D parking camera system is also available.

If you are planning to upgrade your current vehicle, our team can help you establish your trade equity before you visit.

Where to Test Drive and Finance Your 2026 BMW 3 Series

Choosing between the 330i and the M340i comes down to experiencing the power difference in person. Our sales advisors can walk you through standard equipment on each trim, demonstrate the BMW Curved Display, and help you configure the trim and package combination that fits your budget.

Our finance center works with a network of lenders to offer competitive purchasing pathways. You can save time at the showroom by submitting an online credit application to review potential financing terms before your test drive.

For a full walkthrough of the 2026 3 Series beyond trims and pricing, see our 2026 BMW 3 Series model overview. When you are ready to compare trims in person, contact our team or call us directly at 888-713-6529.

Disclaimers

Manufacturer’s Suggested Retail Price (MSRP) for new vehicles includes manufacturer and distributor options and delivery, process and handling fees, which may be subject to change at any time. MSRP excludes taxes, title, license and dealer installed options, accessories, fees and charges. MSRP is not the dealer advertised price. Dealer price will vary. The dealer sets the final price.

EPA-estimated fuel economy figures are for comparison purposes only. Your actual mileage will vary depending on driving conditions, how you drive and maintain your vehicle, battery age/condition, and other factors.

Specifications, pricing, and equipment availability sourced from BMW of North America and third-party automotive data providers as of September 2026 and are subject to change. Confirm current details with BMW of Riverside.