The BMW M badge carries significant weight, representing the pinnacle of performance and driving dynamics in the brand’s lineup. However, not every BMW with an “M” is a full-fledged M car. The 2018 Bmw M550i xDrive occupies a unique position, bridging the gap between the luxurious 5 Series sedan and the high-performance M5. It’s an M Performance model, a step above the 540i M Sport, offering a compelling blend of power, luxury, and everyday usability without reaching the outright intensity – or price tag – of the M5.
For those seeking near-M5 thrills without the associated cost, the 2018 BMW M550i xDrive presents itself as a very attractive proposition. It delivers a significant dose of M DNA, making it a standout in the performance sedan segment.
M Performance Enhancements: Power and Poise
The 2018 M550i xDrive is part of BMW’s M Performance line, which includes models like the X3 M40i, X4 M40i, and M240i. These vehicles receive both cosmetic and mechanical upgrades over their standard counterparts, enhancing both appearance and driving dynamics.
Visually, the M550i distinguishes itself with M accents on the aggressive front air intakes, aluminum pedals, distinctive floor mats, and a thicker M Sport steering wheel. These touches hint at the performance capabilities lurking beneath the surface.
However, the most significant upgrades lie in the powertrain and chassis. At the heart of the 2018 BMW M550i xDrive is a potent 4.4-liter twin-turbocharged V8 engine, generating 456 horsepower and 480 pound-feet of torque. This robust engine is paired with a sport-tuned chassis that lowers the car by approximately 0.4 inches compared to the standard 540i. Further enhancing the driving experience are a sports exhaust system and larger M Sport brakes, ensuring both thrilling acceleration and confident stopping power.
BMW claims the 2018 M550i xDrive can accelerate from 0 to 60 mph in under 4 seconds, a figure that feels entirely believable in real-world driving. This level of performance places it firmly in the realm of high-performance sedans, capable of delivering exhilarating acceleration and engaging driving dynamics.
Driving Experience: Sporty Agility and Luxurious Comfort
In spirited driving scenarios, particularly in Sport Plus mode, the 2018 BMW M550i xDrive truly comes alive. The ZF-sourced eight-speed automatic transmission responds with rapid and precise shifts, holding gears through the rev range to maximize performance. The M550i demonstrates impressive agility in corners, eagerly tackling tight hairpins and decreasing-radius turns. The intelligent xDrive all-wheel-drive system actively manages torque distribution, enhancing grip and stability, especially when cornering aggressively. This system helps maintain composure and control, even when pushing the limits.
However, the M550i is not solely focused on outright performance. In its default Comfort mode, it transforms into a refined and comfortable luxury sedan. The ride becomes noticeably smoother, the steering lightens, and the transmission shifts more gently. In this mode, the 2018 BMW M550i xDrive is perfectly suited for daily driving and long journeys, providing the serene and composed ride expected of a 5 Series. The M Performance enhancements do not compromise the car’s everyday usability, making it a versatile choice for various driving conditions.
Interior and Technology: Premium Cabin and Advanced Features
The interior of the 2018 BMW M550i xDrive is a testament to BMW’s commitment to luxury and quality. The test vehicle featured sumptuous Cognac Dakota leather upholstery with contrasting blue stitching, creating a sophisticated and sporty ambiance. The cabin is further enhanced by shiny black trim, complemented by open-pore wood and brushed aluminum accents, resulting in a modern and premium feel.
As a generously sized sedan, the 2018 M550i xDrive offers ample head- and legroom for both front and rear occupants. The trunk provides a substantial 18.7 cubic feet of cargo space, with a pass-through for longer items and foldable rear seats for increased versatility.
The M550i is equipped with BMW’s iDrive infotainment system, displayed on a large 10.2-inch touchscreen. The system is intuitive and user-friendly, offering control via touch or the rotary controller on the center console. Gesture control is also available, allowing for basic functions like volume adjustment, although its reliability can be inconsistent compared to traditional controls. Apple CarPlay is offered as an optional extra, albeit at an additional cost, which is a point of contention given its standard inclusion in many less expensive vehicles.
Options and Value: Balancing Features and Price
BMW is renowned for its extensive list of optional packages and standalone features, and the 2018 M550i xDrive is no exception. A range of packages are available, allowing buyers to customize their vehicle with features like parking assistance, dynamic handling enhancements, and advanced driver-assistance systems.
For those prioritizing driving dynamics, the Dynamic Handling Package, featuring adaptive suspension, is a worthwhile consideration. The Driving Assistance packages offer valuable safety and convenience features, including blind-spot monitoring, lane-keeping assist, adaptive cruise control, and forward collision warning. While options can quickly inflate the price, carefully selecting desirable packages allows for a personalized and well-equipped 2018 BMW M550i xDrive.
Compared to the full-fledged M5, the 2018 BMW M550i xDrive offers a significant price advantage, coming in tens of thousands of dollars less. This price difference makes the M550i a more accessible entry point to high-performance BMW sedans for many buyers.
Competition and Conclusion: A Strong Contender
The 2018 BMW M550i xDrive competes in a competitive segment of luxury performance sedans. Rivals include the Mercedes-AMG E43, Audi S6, and Cadillac CTS V-Sport. While each competitor offers its own strengths and characteristics, the M550i stands out with its compelling blend of power, luxury, and driving dynamics.
The Mercedes-AMG E43, while similarly priced, offers slightly less horsepower. The Audi S6 is also in the same price range, while the Cadillac CTS V-Sport offers a more budget-friendly option with slightly less power. Of course, the BMW M5 itself represents the ultimate performance benchmark in this class, but at a significantly higher price point.
Ultimately, the 2018 BMW M550i xDrive hits a sweet spot. It delivers exhilarating performance for driving enthusiasts while maintaining the comfort, luxury, and technology expected of a BMW 5 Series. For those seeking a high-performance sedan that is both thrilling and livable, without the top-tier price of an M5, the 2018 BMW M550i xDrive is an excellent choice. It represents a smart and satisfying balance of performance and practicality in the luxury sedan market.
