The BMW 7 Series Long (G12) 750Li xDrive Steptronic, produced from 2015 to 2019, represents the pinnacle of luxury and performance within the sixth generation of BMW’s flagship sedan. Positioned as a high-end variant of the long-wheelbase 7 Series, the 750Li catered to buyers seeking a blend of powerful acceleration, sophisticated technology, and extended rear passenger space. It was primarily marketed in markets where larger, chauffeur-driven luxury sedans were in demand, including China, the Middle East, and the United States. The “Li” designation signifies the extended wheelbase, adding approximately 140mm (5.5 inches) to the standard 7 Series length, almost entirely benefiting rear passenger legroom.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series Long (G12) |
| Type (Engine) | 750Li (450 Hp) xDrive Steptronic |
| Start of production | 2015 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 11.6-11.9 l/100 km (20.3 – 19.8 US mpg, 24.4 – 23.7 UK mpg, 8.6 – 8.4 km/l) |
| Fuel consumption (economy) – extra urban | 6.3-6.5 l/100 km (37.3 – 36.2 US mpg, 44.8 – 43.5 UK mpg, 15.9 – 15.4 km/l) |
| Fuel consumption (economy) – combined | 8.3-8.5 l/100 km (28.3 – 27.7 US mpg, 34 – 33.2 UK mpg, 12 – 11.8 km/l) |
| CO2 emissions | 192-197 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.5 sec |
| Acceleration 0 – 62 mph | 4.5 sec |
| Acceleration 0 – 60 mph | 4.3 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 4.3 kg/Hp, 235 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 339.4 Nm/tonne |
| Power | 450 Hp @ 5500-6000 rpm |
| Power per litre | 102.4 Hp/l |
| Torque | 650 Nm @ 1800-4500 rpm (479.42 lb.-ft. @ 1800-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N63B44C |
| 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 | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 10 l (10.57 US qt | 8.8 UK qt) |
| Coolant | 9.2 l (9.72 US qt | 8.09 UK qt) |
| Kerb Weight | 1915 kg (4221.85 lbs.) |
| Max. weight | 2615 kg (5765.09 lbs.) |
| Max load | 700 kg (1543.24 lbs.) |
| Trunk (boot) space – minimum | 515 l (18.19 cu. ft.) |
| Fuel tank capacity | 78 l (20.61 US gal | 17.16 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2300 kg (5070.63 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 5238 mm (206.22 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1485 mm (58.46 in.) |
| Wheelbase | 3210 mm (126.38 in.) |
| Front track | 1611 mm (63.43 in.) |
| Rear (Back) track | 1640 mm (64.57 in.) |
| Front overhang | 880 mm (34.65 in.) |
| Rear overhang | 1148 mm (45.2 in.) |
| Ride height (ground clearance) | 135 mm (5.31 in.) |
| Drag coefficient (Cd) | 0.27 |
| Minimum turning circle (turning diameter) | 12.9 m (42.32 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 |
| Tires size | 245/50 R18 100Y; 245/45 R19; 275/40 R19; 245/40 R20; 275/35 R20; 245/35 R21; 275/30 R21 |
| Wheel rims size | 8J x 18; 8.5J x 19; 9.5J x 19; 8.5J x 20; 10J x 20; 8.5J x 21; 10J x 21 |
Powertrain & Engine Architecture
The 750Li xDrive Steptronic is powered by BMW’s N63B44C 4.4-liter twin-turbocharged V8 engine. This engine, a member of the N63 family, utilizes direct fuel injection and Valvetronic variable valve timing and lift. The twin-turbocharger setup consists of two twin-scroll turbochargers, positioned within the V of the engine to minimize turbo lag and improve responsiveness. The engine produces 450 horsepower at 5,500-6,000 rpm and a substantial 650 Nm (479 lb-ft) of torque between 1,800 and 4,500 rpm. The engine is longitudinally mounted at the front of the vehicle. The transmission is an 8-speed Steptronic automatic, known for its smooth shifts and adaptive learning capabilities. The xDrive all-wheel-drive system provides enhanced traction and stability, distributing power between the front and rear axles as needed.
Driving Characteristics
The 750Li, with its potent V8 and all-wheel drive, delivers impressive acceleration. The 0-60 mph sprint takes approximately 4.3 seconds. The Steptronic transmission is well-tuned for both comfortable cruising and spirited driving. While not as overtly sporty as some of BMW’s smaller models, the 750Li offers a refined and confident driving experience. The long wheelbase contributes to a smooth ride, absorbing bumps effectively. Compared to the 740i (with its turbocharged inline-six), the 750Li provides significantly more power and torque, resulting in effortless acceleration and a more relaxed driving experience, especially when fully loaded. Compared to the diesel-powered 730d, the 750Li offers a more responsive and characterful engine, albeit with higher fuel consumption.
Equipment & Trim Levels
The 750Li xDrive Steptronic came standard with a comprehensive array of luxury features. These included leather upholstery, power-adjustable heated and ventilated front seats with massage function, a premium sound system (typically Bowers & Wilkins), a large infotainment screen with iDrive controller, navigation, and a suite of driver-assistance systems such as adaptive cruise control, lane departure warning, and automatic emergency braking. The long wheelbase allowed for more generous rear seating with available individual rear seats, a rear entertainment system, and a refrigerated compartment. Optional extras included a panoramic sunroof, upgraded leather trim, and various customization options through BMW’s Individual program.
Chassis & Braking
The G12 7 Series utilizes a lightweight chassis construction incorporating aluminum and high-strength steel. The front suspension features a double-wishbone design, while the rear employs an independent multi-link setup. This configuration provides a comfortable ride and precise handling. The 750Li is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The braking system is augmented by ABS, Dynamic Stability Control (DSC), and other electronic aids. The standard suspension setup is tuned for comfort, but optional adaptive suspension systems, including air suspension, were available to further enhance ride quality and handling.
Market Reception & Comparison
The 750Li xDrive Steptronic was generally well-received by automotive critics, who praised its powerful engine, luxurious interior, and advanced technology. However, some reviewers noted the high price tag and the complexity of the infotainment system. Fuel economy, while respectable for a V8-powered luxury sedan, was a common point of criticism. Compared to its rivals, such as the Mercedes-Benz S-Class and Audi A8, the 750Li offered a more driver-focused experience while still providing a high level of luxury and comfort. The 750Li’s fuel economy typically fell slightly behind the six-cylinder and diesel variants of the 7 Series, but the performance difference was substantial.
Legacy
The N63B44C engine, while initially prone to some oil consumption issues, proved to be a robust and reliable powerplant with proper maintenance. The 750Li xDrive Steptronic remains a desirable used luxury car, offering a compelling combination of performance, comfort, and technology. However, potential buyers should be aware of the potential for higher maintenance costs compared to the lower-powered variants of the 7 Series. The G12 7 Series, including the 750Li, represented a significant step forward in luxury and technology for BMW, setting a high standard for its competitors.
