The 2026 BMW 3 Series is offered in two engine trims, the 330i and the M340i, and each can be had with rear-wheel drive or xDrive all-wheel drive. That yields four builds spanning $48,000 MSRP to $64,300 MSRP, from an efficiency-minded commuter to a 386-horsepower sport sedan. Most shoppers land somewhere in the middle, and the decision usually comes down to how much power you want and whether you need all-weather traction.

At BMW of Napa Valley in Fairfield, we stock the 3 Series lineup and can put you behind the wheel of more than one build in an afternoon. This page covers each trim in detail, a side-by-side matrix, the natural head-to-head comparisons, a value verdict with step-up costs, and a buyer guide by use case. For Northern California drivers, the wider picture starts at the 3 Series research hub.

Overview

2026 BMW 3 Series Trim Lineup at a Glance

Here is the full lineup with starting prices and a one-line read on where each build fits. Adding xDrive all-wheel drive costs $2,000 on either engine.

Build	Starting MSRP	Where It Fits
330i	$48,000 MSRP	The efficient rear-wheel-drive commuter, well equipped from the start.
330i xDrive	$50,000 MSRP	The same car with all-weather traction, the build we stock most heavily.
M340i	$62,300 MSRP	The six-cylinder performance pick short of a full M car.
M340i xDrive	$64,300 MSRP	Full performance with all-wheel-drive grip in every season.

MSRP excludes the $1,350 destination fee, tax, title, license, and dealer fees. Pricing and equipment can change; confirm current pricing with the dealership.

The Builds

Trim-by-Trim Breakdown

330i (from $48,000 MSRP)

The 330i uses a 2.0L TwinPower Turbo 4-cylinder making 255 horsepower and 295 lb-ft of torque, paired with an 8-speed automatic and, on this build, 48-volt mild-hybrid assistance. Rear-wheel drive is standard; xDrive all-wheel drive is available for $2,000. It reaches 60 mph in about 5.6 seconds and is EPA-estimated at 28 MPG city / 35 MPG highway / 31 MPG combined in rear-wheel-drive form.

Standard equipment on the 330i is generous: a moonroof, wireless device charging, heated 12-way power front seats, SensaTec upholstery, dual-zone automatic climate control, ambient lighting, and 18-inch wheels, plus forward collision mitigation and lane keeping assistance. The M Sport Package is available on the 330i for the aerodynamic body kit and M design touches. Who it is for: the driver who wants the 3 Series experience and strong efficiency without stepping up to the six-cylinder.

M340i (from $62,300 MSRP)

The M340i steps up to a 3.0L M TwinPower Turbo inline 6-cylinder with 48-volt mild-hybrid assistance, producing 386 horsepower and 398 lb-ft of torque through the same 8-speed automatic. Rear-wheel drive is standard and xDrive all-wheel drive is available for $2,000; in xDrive form it reaches 60 mph in about 4.1 seconds. The M340i returns an EPA-estimated 29 MPG combined.

On top of the 330i's equipment, the M340i adds standard 19-inch wheels, an M Sport Differential, M Sport Brakes, blind-spot warning, rear cross-traffic alert, lane departure warning, front and rear parking sensors, remote start, and proximity keyless entry. Who it is for: the driver who wants real performance and the six-cylinder character while keeping a sedan they can live with every day.

Above the M340i sits the full BMW M3, the dedicated M car. It is covered on its own M340i vs M3 comparison rather than in this trim breakdown.

Compare

Side-by-Side Comparison Matrix

Build	Engine	Power	Drivetrain	Notable Standard Kit	Starting MSRP
330i	2.0L turbo 4-cylinder	255 horsepower	Rear-wheel drive	Moonroof, heated power seats, 18-inch wheels	$48,000 MSRP
330i xDrive	2.0L turbo 4-cylinder	255 horsepower	xDrive all-wheel drive	Adds all-wheel drive to the 330i	$50,000 MSRP
M340i	3.0L turbo 6-cylinder	386 horsepower	Rear-wheel drive	19-inch wheels, M Sport Differential and Brakes, added driver aids	$62,300 MSRP
M340i xDrive	3.0L turbo 6-cylinder	386 horsepower	xDrive all-wheel drive	Adds all-wheel drive to the M340i	$64,300 MSRP

All four builds share the 8-speed automatic transmission, the BMW Curved Display, 16.9 cubic feet of trunk space, and seating for five. Full measurements live on the 3 Series specifications page.

Head to Head

Common 3 Series Trim Comparisons

330i vs M340i

This is the central decision in the lineup, and it is really a decision about the engine. The 330i's 2.0L four-cylinder makes 255 horsepower and reaches 60 mph in about 5.6 seconds, while the M340i's 3.0L six-cylinder makes 386 horsepower and, in xDrive form, gets there in about 4.1 seconds. The M340i also brings its own hardware, the M Sport Differential and M Sport Brakes, plus a longer list of standard driver aids and 19-inch wheels. The price gap is $14,300 between the rear-wheel-drive versions. If your driving is mostly commuting and errands, the 330i rarely feels short on power; if you want the six-cylinder pull and the sharper chassis, the M340i is the one to drive.

Rear-Wheel Drive vs xDrive

On both engines, xDrive all-wheel drive is a $2,000 option, and it is a lateral choice about traction rather than a step up in power or equipment. Rear-wheel drive keeps the classic sport-sedan balance and a slightly lower price; xDrive adds confidence on wet roads, morning fog, and the occasional grade. For a driver who sees real weather or wants year-round security, xDrive is an easy $2,000 to justify, which is why the 330i xDrive is the build we keep in the deepest supply. For a fair-weather enthusiast, rear-wheel drive is a legitimate and slightly lighter choice.

The Value Read

The 3 Series Value Verdict and Step-Up Guide

The value sweet spot is the 330i xDrive at $50,000 MSRP: the four-cylinder is already well equipped, the $2,000 for all-wheel drive buys real all-weather capability, and it is the build we stock most heavily. The step to think hardest about is jumping to the M340i for the badge alone; the six-cylinder is genuinely rewarding, but only worth its $14,300 premium if you value the performance itself, not just the name.

Step Up	Price Delta	What You Gain
330i to 330i xDrive	+$2,000	xDrive all-wheel drive. A lateral traction move, same power and equipment.
330i to M340i	+$14,300	The 386-horsepower six-cylinder, M Sport Differential and Brakes, 19-inch wheels, and added standard driver aids.
M340i to M340i xDrive	+$2,000	xDrive all-wheel drive. Again a lateral traction move on the same hardware.

Buyer Guide

Which 2026 BMW 3 Series Trim Is Right for You?

If you mostly commute and want efficiency

Go with the 330i. Its 255 horsepower is plenty for daily driving and it returns an EPA-estimated 31 MPG combined, the efficiency high point of the lineup.

If you want year-round traction

Choose the 330i xDrive. For a $2,000 premium you get all-wheel drive for wet roads and foggy mornings, and it is the build with the deepest selection on our lot.

If you want serious performance you can drive daily

The M340i is the pick. The six-cylinder delivers 386 horsepower and about 4.1 seconds to 60 mph in xDrive form, yet it still returns an EPA-estimated 29 MPG combined.

If you are cross-shopping the segment

Read our 3 Series vs Mercedes C-Class and 3 Series vs Audi A5 comparisons before you decide, then match the winning case to a trim above.

Shop Local

Shop Every 3 Series Trim in Person

In our showroom, the current selection runs deepest in the 330i xDrive, and we typically carry the M340i as well, so you can compare a four-cylinder and a six-cylinder back to back in one visit. At BMW of Napa Valley, we serve drivers across Solano County and Northern California, from Vacaville and Vallejo to American Canyon, with quick access off I-80. If the exact build you want is not on the lot, we can order it or locate it. Call (707) 402-1500 or contact our team to line up a test drive, and browse the current 3 Series inventory online.

Answers

2026 BMW 3 Series Trim FAQs

Explore the 2026 BMW 3 Series Research Hub