Switching from a 2020 Bmw M340i to a 2022 M550i offers a unique perspective on the differences between these two performance sedans. As someone who has lived with both as daily drivers, here are some key takeaways for those considering a similar upgrade or comparison, especially if you’re focused on the 2020 BMW M340i.
One of the first things you notice is the ride comfort. Both the 2020 BMW M340i and the M550i are designed for daily usability, but the M550i elevates this with a noticeably softer suspension. This translates to a more plush ride, absorbing road imperfections with greater ease. Beyond just suspension, the overall build quality of the M550i feels a step up, contributing to a more refined and luxurious daily driving experience compared to the already excellent 2020 BMW M340i.
The engine is where the soul of these cars truly diverges. The 2020 BMW M340i boasts the lauded B58 inline-six, a powerplant known for its responsiveness and pleasing sound. However, stepping into the M550i means experiencing the increasingly rare V8 in a sedan format. The M550i’s V8 delivers a richer, more profound auditory experience that is simply intoxicating. While the B58 in the 2020 M340i sounds good, particularly the pre-2021 models which had a more pronounced exhaust note with more burbles and crackles, it doesn’t quite match the visceral thrill of the V8. It’s worth noting that BMW did reduce the exhaust theatrics in the B58 for 2021 and later models, making the 2020 BMW M340i a sweet spot for those who appreciate a more vocal B58.
Handling is another crucial aspect. The 2020 BMW M340i is widely praised for its sharp and agile handling, feeling nimble and connected on twisty roads. The M550i, while heavier, is far from a “boat” as some might describe. While the M340i is undeniably the more athletic of the two, the M550i still holds its own. Body roll is more present in the M550i, but for typical road driving and even spirited cornering, the performance limits of both cars are surprisingly close. Unless you are regularly tracking your vehicle, the M550i provides more than enough dynamic capability without feeling cumbersome.
Moving inside the cabin, the M550i justifies its higher price point with enhanced luxury features. Ventilated and massaging seats become available, features absent in the 2020 BMW M340i. For audiophiles, the Bowers & Wilkins (B&W) sound system, not offered on the M340i, is a significant draw and was a major factor in the switch to the G30 M550i for some owners. Technology-wise, a point to consider, especially if comparing a 2020 BMW M340i to an older M550i like a 2018 model, is the infotainment system. The 2020 M340i features iDrive 7, a more modern system than the iDrive 6 found in a 2018 M550i. However, if you are upgrading from an older BMW like an F30, even iDrive 6 in a 2018 M550i will likely feel like a step forward.
Finally, reliability and long-term ownership are always considerations. A 2018 M550i utilizes the N63TU2 engine, a previous iteration compared to the N63TU3 found in the later LCI M550i models. The N63TU2 is considered slightly less powerful and potentially less reliable than the newer generation. If long-term ownership and tuning potential are priorities, the B58 engine in the 2020 BMW M340i is generally considered a more robust and tuner-friendly platform.
Choosing Between the Two
So, which is the better choice? If your priorities lean towards ultimate comfort and experiencing the thrill of a V8 engine before they potentially disappear from sedans, and you are less concerned about outright track performance or long-term reliability concerns (especially with an older 2018 M550i), then the M550i is compelling. However, for a more balanced approach that favors agility, a slightly more engaging driving experience in tighter corners, potentially better long-term reliability, and a more modern tech interface (comparing a 2020 BMW M340i to an older M550i), the 2020 BMW M340i remains an outstanding choice for the majority of drivers.
