Having spent time behind the wheel of both a 2020 BMW M340i and a 2022 M550i, I’ve experienced firsthand the nuances that set these performance sedans apart. For those eyeing a 2020 M340i, understanding its strengths and how it compares to a step-up model like the M550i is crucial. This comparison offers insights to help you determine which BMW best suits your driving needs and preferences.
When it comes to daily driving comfort, both vehicles excel, but in slightly different ways. The M550i, with its emphasis on luxury, provides a noticeably softer suspension, absorbing road imperfections with greater ease. This translates to a more relaxed and plush ride, particularly on longer journeys. The build quality also feels a notch above in the M550i, contributing to an overall sense of refinement. However, the 2020 M340i doesn’t lag far behind in comfort. It strikes a balance, offering a ride that is compliant enough for daily use while still maintaining a sporty edge. You’ll feel more connected to the road in the M340i, which some drivers might prefer for a more engaging experience.
The powertrain is where the character of these two BMWs truly diverges. The M550i boasts a V8 engine, a configuration becoming increasingly rare in sedans. The sound of that V8 is undeniably intoxicating, delivering a rich and powerful soundtrack that enhances every drive. The 2020 M340i, on the other hand, is powered by BMW’s inline-six B58 engine. While it might not have the deep rumble of a V8, the B58 in the 2020 M340i produces a fantastic sound of its own, especially in the 2020 model year. BMW subtly reduced the exhaust burbles and crackles in the 2021+ models, making the 2020 M340i a sweet spot for those who appreciate a more pronounced exhaust note from the B58.
Handling is another key area of differentiation. The 2020 M340i is often lauded for its agility and sharper handling dynamics. It feels lighter on its feet and more eager to change direction. While some reviewers describe the M550i as feeling like a “boat” in comparison, I found this to be an exaggeration. The M550i is certainly not as nimble as the M340i, exhibiting more body roll in corners, but it’s still a capable and enjoyable car to drive on public roads. Unless you’re regularly tracking your vehicle, the handling limits of both cars are likely to be more than sufficient for spirited driving. For everyday driving and tackling winding roads, the 2020 M340i provides a more engaging and connected driving experience.
Stepping inside, the M550i elevates the luxury and features. It offers premium options not available on the 2020 M340i, such as ventilated and massaging seats, significantly enhancing comfort, especially in warmer climates or on longer drives. The Bowers & Wilkins (B&W) audio system, a standout feature for audiophiles, is also exclusive to the M550i in this comparison. For those prioritizing top-tier audio and luxury amenities, the M550i holds a clear advantage. However, the 2020 M340i is by no means lacking in features. It offers a well-equipped cabin with modern technology and comfortable seating. Notably, the 2020 M340i comes with BMW’s iDrive 7 (ID7) infotainment system, a more advanced system compared to the iDrive 6 (ID6) found in earlier M550i models like a 2018. For buyers coming from older BMW models, the technology in the 2020 M340i will feel thoroughly modern and user-friendly.
Considering older M550i models, such as a 2018, it’s important to note the engine differences. A 2018 M550i utilizes the N63TU2 engine, while later LCI (Life Cycle Impulse) versions feature the updated N63TU3. The N63TU3 is generally considered slightly more powerful and potentially more reliable than its predecessor. When comparing to the 2020 M340i and its B58 engine, the B58 is often favored for its robust reliability and tuning potential, making the 2020 M340i a potentially smarter choice for long-term ownership and those interested in performance modifications.
In conclusion, the best choice between a 2020 M340i and an M550i depends on your individual priorities. If ultimate comfort, luxurious features, and the visceral thrill of a V8 engine are paramount, and you are less concerned about outright handling sharpness, the M550i is a compelling option. However, for a more engaging and agile driving experience, potentially better long-term reliability, and a still very potent and enjoyable engine in its own right, the 2020 M340i emerges as the stronger all-around choice for a majority of drivers seeking a performance sedan that excels in daily driving and spirited weekend excursions.
