The BMW 730d xDrive, produced from 2020 to 2022, represents a significant iteration of the G11 7 Series following its 2019 Life Cycle Impulse (LCI) facelift. This variant, positioned as a mid-range offering within the 7 Series lineup, combined a potent diesel engine with mild-hybrid technology and BMW’s xDrive all-wheel-drive system. It aimed to deliver a balance of performance, efficiency, and luxury, catering to buyers seeking a refined grand touring experience. The 730d xDrive served as a key model in BMW’s strategy to offer a diverse range of powertrain options within the flagship 7 Series, appealing to both European and global markets where diesel engines remained popular.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series (G11 LCI, facelift 2019) |
| Type (Engine) | 730d (286 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | 2020 |
| End of production | 2022 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 6.3-6.5 l/100 km (37.3 – 36.2 US mpg) |
| Fuel consumption (extra urban) | 4.3-4.5 l/100 km (54.7 – 52.3 US mpg) |
| Fuel consumption (combined) | 5.0-5.2 l/100 km (47 – 45.2 US mpg) |
| CO2 emissions | 133-138 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.6 sec |
| Acceleration 0 – 62 mph | 5.6 sec |
| Acceleration 0 – 60 mph | 5.3 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | EURO 6d |
| Weight-to-power ratio | 6.8 kg/Hp |
| Weight-to-torque ratio | 3 kg/Nm |
| Gross battery capacity | 0.528 kWh |
| Electric motor power | 11 Hp |
| Power | 286 Hp @ 4000 rpm |
| Torque | 650 Nm @ 1500-2500 rpm (479.42 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B57D30A |
| Engine displacement | 2993 cm3 (182.64 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 7 l (7.4 US qt | 6.16 UK qt) |
| Coolant | 9.9 l (10.46 US qt | 8.71 UK qt) |
| Kerb Weight | 1935 kg (4265.94 lbs.) |
| Max. weight | 2600 kg (5732.02 lbs.) |
| Max load | 665 kg (1466.07 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%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 5120 mm (201.57 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1467 mm (57.76 in.) |
| Wheelbase | 3070 mm (120.87 in.) |
| Front track | 1617 mm (63.66 in.) |
| Rear (Back) track | 1646 mm (64.8 in.) |
| Ride height (ground clearance) | 135 mm (5.31 in.) |
| Drag coefficient (Cd) | 0.24 |
| Minimum turning circle | 12.6 m (41.34 ft.) |
| Drivetrain Architecture | ICE and electric motor, All wheel drive |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 8 |
| Gearbox type | Automatic transmission Steptronic |
| Front suspension | Double wishbone, Air suspension |
| Rear suspension | Independent multi-link suspension, Air suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
The heart of the 730d xDrive is BMW’s B57D30A 3.0-liter inline-six diesel engine. This engine is a member of the modular B-series engine family, known for its efficiency and refinement. The B57 features a common-rail direct injection system operating at extremely high pressures (2,500 bar) for optimized combustion. A twin-scroll turbocharger with variable geometry turbine (VGT) technology minimizes turbo lag and enhances responsiveness across the rev range. The engine also incorporates an intercooler to further cool the intake air, increasing power density. The mild-hybrid system, utilizing a 48V starter-generator, provides a boost during acceleration and enables smoother start-stop operation, contributing to improved fuel economy. The engine produces 286 horsepower at 4,000 rpm and a substantial 650 Nm (479 lb-ft) of torque between 1,500 and 2,500 rpm. This torque output is a key characteristic of the engine, providing strong pulling power for effortless cruising and overtaking. The engine is paired with BMW’s eight-speed Steptronic automatic transmission, known for its smooth and quick shifts.
Driving Characteristics
The 730d xDrive delivers a refined and comfortable driving experience. The abundant low-end torque from the diesel engine, combined with the eight-speed automatic, provides brisk acceleration. While not as overtly sporty as the gasoline-powered 7 Series variants, the 730d xDrive offers more than adequate performance for most drivers, achieving 0-60 mph in approximately 5.3 seconds. The xDrive all-wheel-drive system provides excellent traction in all weather conditions, enhancing stability and confidence. The air suspension contributes to a smooth and isolated ride, absorbing bumps and imperfections in the road surface effectively. The steering is precise and well-weighted, providing a connected feel to the driver. Compared to higher-output 7 Series models, the 730d xDrive prioritizes fuel efficiency and relaxed cruising over outright performance. It also offers a quieter and more refined driving experience than some of the more aggressively tuned variants.
Equipment & Trim Levels
The 730d xDrive came standard with a comprehensive array of luxury features. Interior appointments typically included leather upholstery, power-adjustable front seats with memory function, and a premium sound system. Standard technology included BMW’s iDrive infotainment system with a large touchscreen display, navigation, Apple CarPlay, and Android Auto compatibility. Safety features such as automatic emergency braking, lane departure warning, and adaptive cruise control were also standard. Optional extras included features like massaging seats, a rear-seat entertainment system, a panoramic sunroof, and upgraded leather trim. The trim level could be further customized with various interior and exterior styling packages.
Chassis & Braking
The 730d xDrive utilizes a sophisticated chassis design focused on comfort and stability. The front suspension features a double-wishbone setup with air springs, while the rear suspension employs an independent multi-link design, also with air springs. This air suspension system allows for adjustable ride height and damping, further enhancing ride comfort. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Standard safety features include ABS, electronic stability control, and traction control.
Market Reception & Comparison
The 730d xDrive was generally well-received by automotive critics. It was praised for its refined driving experience, fuel efficiency, and luxurious interior. Critics noted that while it didn’t offer the same level of performance as the higher-output 7 Series models, it provided a compelling alternative for buyers prioritizing comfort and economy. Compared to the 740i (gasoline) and 750i (V8 gasoline) variants, the 730d xDrive offered significantly better fuel economy. Against other diesel-powered luxury sedans, such as the Mercedes-Benz S350d, the 730d xDrive was often considered to be more engaging to drive and offer a more technologically advanced interior.
Legacy
The BMW 730d xDrive (G11 LCI) represents a well-engineered and refined luxury sedan. The B57 diesel engine has proven to be a reliable and durable powerplant, and the mild-hybrid system adds a layer of efficiency without compromising the driving experience. On the used car market, these models are generally sought after for their combination of luxury, performance, and fuel economy. Proper maintenance, particularly regarding the diesel particulate filter (DPF) and emissions control systems, is crucial for long-term reliability. The G11 7 Series, including the 730d xDrive, is considered a technologically advanced and comfortable grand tourer that continues to hold its appeal in the luxury car segment.
