The BMW 6 Series Gran Coupe (F06) 650i xDrive Steptronic, produced from 2012 to 2015, represents the high-performance end of BMW’s four-door coupe lineup. Positioned as the flagship engine option within the F06 generation, it combined a potent twin-turbocharged V8 engine with BMW’s xDrive all-wheel-drive system and an eight-speed Steptronic automatic transmission. This variant aimed to deliver a luxurious grand touring experience with impressive performance capabilities, appealing to buyers seeking both comfort and dynamic driving characteristics. It served as a direct competitor to vehicles like the Porsche Panamera and Mercedes-Benz CLS.
Technical Specifications
| Brand | BMW |
| Model | 6 Series |
| Generation | 6 Series Gran Coupe (F06) |
| Type | 650i (450 Hp) xDrive Steptronic |
| Start of production | 2012 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 4 |
| Fuel consumption (urban) | 12.9-13.1 l/100 km (18.2 – 18 US mpg, 21.9 – 21.6 UK mpg, 7.8 – 7.6 km/l) |
| Fuel consumption (extra urban) | 7.1-7.3 l/100 km (33.1 – 32.2 US mpg, 39.8 – 38.7 UK mpg, 14.1 – 13.7 km/l) |
| Fuel consumption (combined) | 9.2-9.4 l/100 km (25.6 – 25 US mpg, 30.7 – 30.1 UK mpg, 10.9 – 10.6 km/l) |
| CO2 emissions | 215-219 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.4 sec |
| Acceleration 0 – 62 mph | 4.4 sec |
| Acceleration 0 – 60 mph | 4.2 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 4.3 kg/Hp, 232 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 335.1 Nm/tonne |
| Power | 450 Hp @ 5500-6000 rpm |
| Power per litre | 102.4 Hp/l |
| Torque | 650 Nm @ 2000-4500 rpm (479.42 lb.-ft. @ 2000-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N63B44B |
| Engine displacement | 4395 cm3 (268.2 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 88.3 mm (3.48 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Coolant | 10.9 l (11.52 US qt | 9.59 UK qt) |
| Kerb Weight | 1940 kg (4276.97 lbs.) |
| Max. weight | 2550 kg (5621.79 lbs.) |
| Max load | 610 kg (1344.82 lbs.) |
| Trunk (boot) space – minimum | 460 l (16.24 cu. ft.) |
| Trunk (boot) space – maximum | 1265 l (44.67 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Length | 5007 mm (197.13 in.) |
| Width | 1894 mm (74.57 in.) |
| Height | 1392 mm (54.8 in.) |
| Wheelbase | 2968 mm (116.85 in.) |
| Front track | 1600 mm (62.99 in.) |
| Rear (Back) track | 1665 mm (65.55 in.) |
| Ride height (ground clearance) | 126 mm (4.96 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle (turning diameter) | 11.95 m (39.21 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 |
| Wheel rims size | 8J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 |
INTRODUCTION
The F06 650i xDrive Steptronic, launched in 2012, was a key component of BMW’s revival of the 6 Series Gran Coupe. Building upon the success of the 5 Series (F10) platform, the F06 offered a more stylish and luxurious alternative with a focus on grand touring. The 650i, powered by the N63B44B engine, represented the performance pinnacle of the range, offering a significant step up in power and refinement compared to the 640i models. Its all-wheel-drive system provided enhanced traction and stability, making it suitable for a wider range of driving conditions. Production continued until 2015, when it was superseded by updated models.
Powertrain & Engine Architecture
At the heart of the 650i lies the N63B44B 4.4-liter twin-turbocharged V8 engine. This engine is a significant departure from earlier BMW V8s, employing direct injection, a twin-scroll turbocharger setup, and variable valve timing (VANOS) and variable valve lift (Valvetronic) technologies. The direct injection system delivers fuel directly into the combustion chamber, improving efficiency and reducing emissions. The twin-turbochargers, one for each bank of cylinders, provide a broad torque curve and minimize turbo lag. The engine produces 450 horsepower at 5,500-6,000 rpm and a substantial 650 Nm (479 lb-ft) of torque between 2,000 and 4,500 rpm.
The engine is paired with BMW’s eight-speed Steptronic automatic transmission. This transmission offers smooth and quick shifts, and features a manual shift mode for more driver involvement. The xDrive all-wheel-drive system intelligently distributes power between the front and rear axles, optimizing traction and stability. The system typically operates in a rear-wheel-drive bias for a more engaging driving experience, but can seamlessly shift power to the front wheels when needed.
Driving Characteristics
The 650i xDrive Steptronic delivers a refined and powerful driving experience. The twin-turbo V8 provides effortless acceleration, with the car capable of reaching 0-60 mph in around 4.2 seconds. The eight-speed automatic transmission complements the engine well, providing smooth and timely gear changes. The xDrive system enhances stability and grip, particularly in adverse weather conditions. While not as overtly sporty as some of BMW’s other models, the 650i offers a comfortable and engaging driving experience, making it well-suited for long-distance cruising. The steering is precise and well-weighted, providing good feedback to the driver. Compared to the 640i, the 650i offers a significantly more potent power delivery and a more luxurious feel.
Equipment & Trim Levels
The 650i xDrive Steptronic came standard with a comprehensive list of features, including leather upholstery, power-adjustable front seats with memory function, a premium sound system, a navigation system, and a rearview camera. Optional extras included features such as adaptive cruise control, a head-up display, ventilated front seats, and a Bang & Olufsen sound system. Interior trim options included various wood veneers and aluminum accents. The standard dashboard configuration featured a 10.2-inch central display screen controlled by BMW’s iDrive system.
Chassis & Braking
The F06 650i xDrive Steptronic utilizes a double-wishbone front suspension and an independent multi-link rear suspension. This suspension setup provides a comfortable ride while maintaining good handling characteristics. The car is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) and stability control systems further enhance safety. The 650i typically featured larger brake rotors and calipers compared to the 640i models.
Market Reception & Comparison
The 650i xDrive Steptronic was generally well-received by automotive critics. Reviewers praised its powerful engine, luxurious interior, and refined driving experience. However, some criticized its relatively high price and complex technology. Compared to the 640i, the 650i offered a significant performance advantage but came at a higher cost. Fuel economy was also lower with the V8 engine. In terms of reliability, the N63 engine has been known to require more maintenance than some of BMW’s other engines, particularly regarding cooling system components and turbocharger issues.
Legacy
The F06 650i xDrive Steptronic remains a desirable grand tourer in the used car market. While the N63 engine requires diligent maintenance, its performance and refinement continue to appeal to enthusiasts. The car’s combination of luxury, performance, and all-wheel-drive capability makes it a compelling alternative to other high-end coupes. Properly maintained examples command a premium price, reflecting their unique blend of attributes. The F06 generation, and particularly the 650i, helped to re-establish the 6 Series as a significant player in the luxury coupe segment.
