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2021 BMW 3-Series Trim Levels with Comparisons & Configurations.

2021 BMW 3-Series Trim Levels, Configurations & Comparisons: 300i vs M340i & 330e
Reviewed & fact checked by
James Murdoch

What 2021 BMW 3-Series Trim Level Should you Buy? What is the Difference Between Trims?

BMW's iconic 3 Series has been thrilling drivers since 1975 and the 2021 model is no exception! Its captivating exterior styling, featuring a prominent grille, sleek crease line, and short overhangs gives it an athletic feel. Plus there are three trim levels to choose from - 300i, M340i & 330e – with advanced technology features for whatever suits your needs best. The Hybrid version offers even more performance plus improved fuel efficiency of up to 50mpg thanks to its gas-powered engine plus electric motor combo; while those looking for something extra special can go all out on the N-Line version which oozes sporty flair through enlarged wheels and unique exterior design elements.

Compare the 3 Series 300i vs. M340i Trims. What is the difference?

Featuring its own unique model branding, the trim levels of the BMW 3 Series draw attention of their own. The 2021 BMW 3 Series 300i has a prestigious ring to its name, one that does not go unnoticed. As the base model for the 2021 BMW 3 Series, the 300i sets expectations high for trim levels to come. It is spacious and easy to handle with great fuel economy and swift acceleration. Fun to drive, the 2021 BMW 3 Series is also the vision of luxury with its upscale look and modern feature inclusion.

Complete with a gasoline-powered engine, the 300i still gets excellent fuel economy. Its ability to attain up to 36 hwy MPG, this sedan is a great commuting vehicle that is perfect for travel, too. Equipped with a turbocharged 4-cylinder engine, the 300i features a reliable powertrain that has stood the test of time. In comparison, the M340i trim level utilizes a turbocharged 6-cylinder engine that brings the power up a notch. However, this additional power generation comes at a cost, which happens to be a reduction in fuel economy to 30 combined MPG.

For buyers who love speed and adventure, the performance upgrades that accompany the M340i trim level are well worth it. While consumers can expect 255 horsepower and a modest 295 lb.-ft. of torque production in the 300i, these specs increase abundantly in the M430i model. Peaking at 382 horsepower and 369 lb.-ft. of torque, the M430i is potent and powerful. The athletic ability of the M430i is the source of the "M" additional to this trim level, which notates its athletic abilities. Both models are great options for consumers, but for those who want to take performance to the next level the M340i would be a preferred selection.

Despite its status as a base model, the 300i is highly customizable. This is a desirable feature for many consumers who yearn for the affordability of a BMW that is accompanied by a plethora of possible upgrades. While buyers have the option to add the sporty styling of the M340i to the 300i model, the powertrain attributes of the M340i are exclusive to that specific model. In other words, the 2021 BMW 3 Series 300i model can play that part, but it cannot put out the power that only the M340i is capable of.

Compare the M340i vs. 330e. What is the difference?

Despite their display of similar styling techniques, the 2021 BMW 3 Series M340i and 330e could not be more different. The 330e is BMW's newest electric contribution to the 3 Series lineup. Featuring a top speed of 87 MPH in its pure electric form, the 330e is not the powerhouse we have come to know in the M340i. However, it is fuel economy and durability do exceed our expectations of its M340i rival. As the most innovative and tech-savvy BMW 3 Series option, the 330e combines sustainability efforts and inspiring design.

One of the most notable differences between the 2021 BMW 3 Series M340i and 330e models is their intended purpose and accompanied design. The M340i is expected to make waves in the sports car market with its dedication to sport-inspired design features, athletic appearance, and responsive driving. In contract, the 330e is intended for those who are interesting in investing in the future of auto. Concerned with fossil fuel consumption allow buyers to feel better about lessening their imprint on the earth's resources with this plug-in hybrid sedan. Two vehicles could not be more different in design, yet similar in included technology and safety elements.

In considering the exterior differences between the 2021 BMW 3 Series M340i and 330e, one of the most identifiable elements is the obvious charging port for an electric source that the 330e utilizes. Located on the front left fender, this door provides easy access for charging. Despite the potential for buyers to add in sport styling to their 330e model, the charging port door will remain a staple for any design layout. For those who are not knowledgeable about the BMW 3 Series plug-in hybrid model, this port may go unnoticed. Yet, for buyers who are comparing these two models, the presence of a flap on the body panel of the plug-in hybrid must be addressed.

Final Thoughts

With the 2021 BMW 3 Series, buyers are presented with a wealth of choice, and selecting the right model for their lifestyle is essential. There’s everything from fuel efficiency to technology upgrades to consider when choosing between one sedan in this series or another — not to mention reputability assurance and competitor offerings! The 330i, M340i, and 330e all come packing serious features that make them some of the most advanced models available on today's market; trust us: whether you're looking for something sustainable or just pure electric power at your fingertips - there will be a perfect match waiting within these iconic Bavarian lines.

If you are a buyer who loves a base model that is affordable, yet inclusive, the 2021 BMW 3 Series 330i is a viable option. Just as equipped as its higher trim level siblings, the 300i offers great value for the cost at which it is priced. Comfort mechanisms, like front seats that offer 14 settings and are power-adjustable, tri-zone automatic climate control, a power moonroof, and synthetic, yet realistic, leather upholstery are just a few features that buyers love about the 330i model. A few standard technology attributes include adaptive cruise control, navigation in an 8.8-inch touchscreen, ten speaker audio system, and direct integration with Apple CarPlay. When all these facets are taken into consideration, it is no wonder why consumers find the 2021 BMW 3 Series 300i model to be more than sufficient.

For those seeking an exhilarating ride, the 2021 BMW 3 Series M430i delivers with its powerful 3.0-liter I-6 engine and a range of driving modes to customize your experience on the road. This model comes equipped with sport brakes and suspension as well as adaptive steering for maximum control while behind the wheel - plus there's also that optional High Performance Tire Package! The 330e is more than just looks; it offers ample sustainability options along with satellite radio, automatic high beam headlights which come standard in this plug-in hybrid version at a slightly higher price tag but extra packages ensure you can find one tailored to your budget too.

Regardless of the trim level you select, the luxurious feel and fun drive offered by any of the 2021 BMW 3 Series models is enough to draw you in to this modern sedan. Comfortable seating, exceptional fuel economy, and a spacious trunk for cargo stowage are some of the best features the 2021 BMW 3 Series has to offer across all models. If you in search of an ultimate luxury cabin, this sedan may not be the best option for you. Yet, many consumers are more than happy with the upscale interior attributes this vehicle incorporates in its modern design. Consumer satisfaction undeniably correlates to the selected trim level and how well it fits their lifestyle needs.

Used 2021 BMW 3-Series:
Previous BMW 3-Series Trim Configurations:

Compare the 2020 BMW 3-Series Trim Levels