The 2016 BMW 640i Gran Coupe represents the peak of the "four-door coupe" evolution, blending the aggressive silhouette of a grand tourer with the practical accessibility of a four-door sedan. As a mid-cycle refresh (LCI) model, it offers a refined N55 turbocharged engine, upgraded LED lighting, and enhanced interior materials that remain competitive in the luxury market.
Defining the 6 Series Gran Coupe Evolution
The "Gran Coupe" designation was BMW’s response to a shift in global luxury trends. Historically, the 6 Series was defined by the E24 and later the E63—large, two-door grand tourers meant for high-speed continental cruising with only two primary occupants. However, as the Mercedes-Benz CLS-Class created a new "four-door coupe" niche, BMW evolved the 6 Series platform (F06) to accommodate two extra doors without sacrificing the low-slung, athletic proportions that defined the nameplate.
The 2016 640i Gran Coupe stands as a pivotal point in this evolution. It sits on a wheelbase that is approximately 4.4 inches longer than the standard 6 Series Coupe, providing the necessary legroom for rear passengers while maintaining a roofline significantly lower than that of a traditional 5 Series sedan. In 2026, looking back at this decade-old design, the evolution is clear: BMW successfully prioritized "lifestyle" and "aesthetic" over the upright, formal utility of a standard executive sedan.
This evolution wasn't merely cosmetic. The F06 chassis utilized aluminum doors and hood, along with thermoplastic front fenders, to manage weight despite the added length. This material evolution was necessary to ensure that the 640i didn't feel like a bloated 5 Series, but rather a sharpened, more exclusive alternative for drivers who found the 7 Series too conservative and the 5 Series too common.
Under the Hood: The N55 Inline-Six Performance
The heart of the 2016 640i Gran Coupe is the N55 3.0-liter TwinPower Turbo inline-six engine. While the V8-powered 650i often garnered headlines for its raw power, the 640i’s inline-six is widely regarded by enthusiasts and mechanics as the more balanced and reliable choice.
Power and Delivery
The N55 engine in the 2016 model produces 315 horsepower and 330 lb-ft of torque. While these numbers might seem modest compared to modern 2026 performance hybrids, the delivery is what defines the experience. Using a twin-scroll turbocharger, the 640i eliminates noticeable turbo lag, providing peak torque as low as 1,300 RPM. This results in a smooth, linear acceleration curve that mimics the feel of a larger naturally aspirated engine.
Transmission and Drivetrain
The engine is mated to the ubiquitous ZF 8-speed Sport Automatic transmission. In the 2016 640i, this gearbox features specific tuning for the Gran Coupe’s weight and mission profile. It offers rapid-fire downshifts in Sport+ mode while remaining nearly imperceptible during highway cruising. Buyers in 2016 could choose between the traditional rear-wheel-drive (RWD) setup or the xDrive all-wheel-drive system. The RWD version offers a more "pure" BMW steering feel, while the xDrive provides year-round traction at the expense of a slightly larger turning radius.
The 2016 Life Cycle Impulse (LCI) Enhancements
In BMW terminology, "LCI" refers to a mid-cycle refresh. The 2016 model year introduced several key updates that distinguished it from the 2013–2015 versions. If you are researching this vehicle in 2026, the LCI updates are the primary reason to choose a 2016 model over an earlier production year.
- Revised Exterior Aesthetics: The kidney grille was redesigned with nine bars instead of ten, creating a more open, aggressive look. The front and rear aprons were subtly reshaped to emphasize the car’s width.
- Standard LED Headlights: Previously an expensive option, Adaptive Full LED headlights became standard for the 2016 model year. These include a selective beam function (on some markets) and a more modern "angel eye" signature.
- Enhanced Aerodynamics: BMW integrated new exterior mirrors with integrated turn signals, which improved airflow and reduced wind noise at high speeds—a critical factor for a vehicle designed for the Autobahn.
- Updated iDrive: The 2016 model featured an updated version of iDrive (4.2), which offered faster processing and a more intuitive interface than earlier iterations, serving as the bridge to the tile-based systems seen in later years.
Interior Craftsmanship and "4+1" Utility
The interior of the 2016 640i Gran Coupe is often cited as one of BMW's best cabins from the F-generation era. The dashboard features a "driver-centric" wrap-around design where the center console flows into the passenger side, creating a cockpit-like feel.
Materials and Seating
High-quality Dakota leather was standard, but many models were equipped with the optional Nappa leather, which included stitched leather across the dashboard and door panels. The 640i Gran Coupe is technically a "4+1" seater. The rear bench has two deeply bolstered outer seats, while the center section is essentially a hump that can accommodate a third passenger for very short trips. However, the extended center console usually dictates that the middle passenger must straddle the climate control vents.
Technology and Sound
The 2016 model year benefitted from the Harman Kardon Surround Sound system as a common option, with the ultra-premium Bang & Olufsen system available for audiophiles. The head-up display (HUD) in this era was also highly advanced, projecting navigation instructions, speed limits, and entertainment data directly onto the windshield, allowing the driver to stay focused on the road.
Technical Specifications Comparison
To understand where the 640i fits in the 2016 lineup, compare it against its siblings and its primary German rival.
| Feature | 2016 BMW 640i Gran Coupe | 2016 BMW 650i Gran Coupe | 2016 Audi A7 3.0T |
|---|---|---|---|
| Engine | 3.0L Turbo Inline-6 | 4.4L Twin-Turbo V8 | 3.0L Supercharged V6 |
| Horsepower | 315 hp | 445 hp | 333 hp |
| Torque | 330 lb-ft | 480 lb-ft | 325 lb-ft |
| 0-60 MPH | 5.4 Seconds | 4.5 Seconds | 5.2 Seconds |
| Fuel Economy (City/Hwy) | 20 / 30 MPG | 17 / 24 MPG | 20 / 30 MPG |
| Standard Wheel Size | 18-inch (19" optional) | 19-inch | 19-inch |
Ownership in 2026: Maintenance and Reliability
In 2026, a 2016 BMW 640i Gran Coupe is a decade-old precision machine. While the N55 engine is far more reliable than the N63 V8 found in the 650i, it still requires diligent maintenance to avoid the "BMW tax" of expensive repairs.
The N55 Maintenance "Trinity"
Owners should be aware of three common areas where the N55 engine typically requires attention around the 80,000 to 100,000-mile mark:
- Oil Filter Housing Gasket (OFHG): This gasket tends to become brittle and leak. If left unchecked, oil can drip onto the serpentine belt, causing it to slip or, in extreme cases, be sucked into the front main seal.
- Valve Cover Gasket: Like the OFHG, the valve cover gasket eventually leaks oil onto the hot exhaust manifold, causing a burning smell and potential smoke.
- Water Pump and Thermostat: BMW uses electric water pumps that often fail without warning. In 2026, if the vehicle hasn't had a water pump replacement in the last 60,000 miles, it should be considered a preventative maintenance priority.
Chassis and Suspension
The 640i Gran Coupe often came with Dynamic Damper Control. While these adaptive shocks provide a sublime ride, they are significantly more expensive to replace than standard dampers. Prospective buyers should check for leaks or a "stiff" ride quality, which indicates a failing electronic valve within the strut.
The Infotainment Longevity
In 2026, the 3G and 4G telematics in these cars may be obsolete or discontinued by carriers. However, the 2016 iDrive system is highly "codable." Many owners use aftermarket MMI boxes to add wireless Apple CarPlay and Android Auto to the factory screen, which modernizes the driving experience and preserves the vehicle's relevance in a digital-first world.
Driving Dynamics: The Grand Tourer Identity
The evolution of the 640i Gran Coupe is best felt through the steering wheel. Unlike the 3 Series, which aims for nimble "tossability," the 640i is designed for stability and high-speed composure. It feels substantial on the road.
The standard Driving Dynamics Control allows the driver to toggle between ECO PRO, COMFORT, COMFORT+, SPORT, and SPORT+. In COMFORT+, the suspension softens remarkably, absorbing road imperfections with a grace that rivals the 7 Series. Switch to SPORT+, and the steering weights up, the throttle response sharpens, and the 8-speed transmission holds gears longer.
For those seeking the best handling, look for models equipped with the M Sport Edition. This package was not just a body kit; it often included the M Aerodynamic kit, 19-inch or 20-inch wheels, and the M steering wheel, which provides a much thicker, more tactile grip than the standard luxury steering wheel.
Frequently Asked Questions
Is the 2016 640i Gran Coupe a reliable used car in 2026?
Yes, compared to its V8 counterparts. The N55 inline-six engine is considered one of BMW’s most robust modern powerplants. However, "reliability" is relative to maintenance. You should expect to spend $1,500–$2,500 annually on preventative maintenance to keep the vehicle in peak condition.
What is the difference between the 640i Coupe and the 640i Gran Coupe?
The Gran Coupe has four doors and a longer wheelbase (by 4.4 inches). While the two-door Coupe offers a slightly more rigid chassis for spirited driving, the Gran Coupe provides a much more usable interior for adults in the rear seats and a more imposing "limousine" presence on the road.
Does the 2016 model have Apple CarPlay?
Factory Apple CarPlay was not standard in 2016; it began appearing more widely in 2017 models with iDrive 5.0. However, the 2016 model can be easily retrofitted with MMI (Multimedia Interface) modules that integrate CarPlay into the existing screen and iDrive controller.
How does the 640i handle in the snow?
The rear-wheel-drive 640i requires high-quality winter tires to be effective in snow due to its low ground clearance and high torque. The xDrive (all-wheel-drive) version is significantly more capable in winter conditions, though winter tires are still recommended for braking performance on ice.
Is the 640i Gran Coupe expensive to insure in 2026?
As a high-end luxury vehicle with complex LED lighting and aluminum body panels, insurance premiums remain higher than average. Replacement parts like the adaptive LED headlights can cost upwards of $2,500 each, which insurers factor into the comprehensive coverage rates.
Practical Recommendation: Finding the Right Spec
If you are in the market for a 2016 BMW 640i Gran Coupe in 2026, prioritize vehicles with a comprehensive service history over those with the lowest mileage. Specifically, look for a model with the M Sport Edition and Multi-contour seats. The seats are arguably the best BMW has ever produced, offering 20-way adjustment and articulated upper backrests that provide unparalleled comfort for long-distance travel.
Avoid models with 20-inch wheels if you live in an area with poor road surfaces; the low-profile run-flat tires are prone to sidewall bubbles and cracked rims. Opting for a 19-inch wheel setup offers a much better balance of aesthetics and ride compliance. Finally, verify that the 10-year service items (coolant flush, transmission fluid service, and belt replacement) have been completed to ensure the vehicle remains a reliable evolution of the luxury sedan rather than a project car.
