The BMW 730Ld xDrive Steptronic, part of the long-wheelbase (LCI) facelift of the G12 7 Series produced from 2020 to 2022, represents a significant offering in the luxury sedan segment. Positioned as a diesel-powered variant within the 7 Series lineup, it aimed to balance performance, efficiency, and comfort for discerning buyers. This model specifically caters to markets where diesel engines remain popular, offering a refined driving experience coupled with BMW’s advanced technology. The “L” designation indicates the extended wheelbase, providing increased rear passenger space, a key feature for luxury car consumers.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series Long (G12 LCI, facelift 2019) |
| Type (Engine) | 730Ld (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) | 5.1-5.3 l/100 km (46.1 – 44.4 US mpg) |
| CO2 emissions | 133-139 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.7 sec |
| Acceleration 0 – 62 mph | 5.7 sec |
| Acceleration 0 – 60 mph | 5.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | EURO 6d |
| Weight-to-power ratio | 6.9 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 | 1975 kg (4354.13 lbs.) |
| Max. weight | 2670 kg (5886.34 lbs.) |
| Max load | 695 kg (1532.21 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 | 5260 mm (207.09 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1479 mm (58.23 in.) |
| Wheelbase | 3210 mm (126.38 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 | 13.1 m (42.98 ft.) |
| Drivetrain Architecture | ICE and electric motor, All wheel drive |
| Number of gears | 8 |
| Gearbox type | Automatic Steptronic |
| Front suspension | Double wishbone, Air suspension |
| Rear suspension | Independent multi-link, Air suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
The 730Ld is powered by BMW’s B57D30A 3.0-liter inline-six diesel engine. This engine is a cornerstone of BMW’s diesel offerings, known for its refinement and efficiency. The B57 features a common-rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. It’s equipped with a twin-scroll turbocharger and intercooler, enhancing both power and torque output. The mild-hybrid system, a 48V setup, adds a small electric motor that provides a power boost during acceleration and allows for smoother start-stop operation, improving fuel economy. The engine produces 286 horsepower at 4000 rpm and a substantial 650 Nm (479 lb-ft) of torque between 1500 and 2500 rpm. This torque is a key characteristic of the engine, providing strong pulling power at low and mid-range speeds. The engine is paired with BMW’s 8-speed Steptronic automatic transmission, known for its smooth and quick shifts. This transmission is electronically controlled and adapts to driving conditions, optimizing gear selection for performance or efficiency.
Driving Characteristics
The 730Ld xDrive delivers a refined and comfortable driving experience. The abundance of torque from the diesel engine provides effortless acceleration, making it well-suited for long-distance cruising and overtaking. While not as overtly sporty as some of the gasoline-powered 7 Series variants, the 730Ld offers ample performance for most drivers. The xDrive all-wheel-drive system provides excellent traction in all weather conditions, enhancing stability and control. The air suspension contributes to a smooth ride, absorbing bumps and imperfections in the road. The 8-speed automatic transmission shifts seamlessly, and the mild-hybrid system provides a subtle but noticeable boost during acceleration. Compared to higher-output 7 Series models, the 730Ld prioritizes fuel efficiency and relaxed cruising over outright performance. It’s also quieter and more refined than some of the more aggressively tuned engines.
Equipment & Trim Levels
The 730Ld xDrive Steptronic typically came well-equipped as standard. Key features included leather upholstery, power-adjustable front seats with memory function, a premium sound system, a large infotainment screen with iDrive controller, navigation, and a comprehensive suite of safety features. Optional extras included features like massaging seats, rear-seat entertainment, upgraded leather options, and various driver-assistance systems. The long wheelbase provides significantly more rear legroom, making it a popular choice for chauffeured transport or families. The interior design is characterized by high-quality materials and a luxurious ambiance.
Chassis & Braking
The 7 Series utilizes a sophisticated chassis design. The front suspension features a double-wishbone setup with air suspension, while the rear employs an independent multi-link suspension, also with air suspension. This air suspension system allows for adjustable ride height and damping, providing a customizable driving experience. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Standard safety features include ABS, stability control, and traction control. The xDrive all-wheel-drive system distributes power between the front and rear axles as needed, optimizing traction and stability.
Market Reception & Comparison
The 730Ld was generally well-received by automotive critics, who praised its fuel efficiency, refined driving experience, and luxurious interior. It was often seen as a sensible choice for buyers who prioritized comfort and economy over outright performance. Compared to the 740i (gasoline) and 750i (gasoline V8) models, the 730Ld offered significantly better fuel economy, but with slightly less acceleration. It also provided a quieter and more relaxed driving experience than the more powerful variants. In terms of reliability, the B57 diesel engine has proven to be robust and durable, although diesel engines generally require more diligent maintenance than gasoline engines.
Legacy
The BMW 730Ld xDrive Steptronic (G12 LCI) represents a compelling blend of luxury, efficiency, and technology. The B57 diesel engine has established a reputation for reliability and longevity, and these models continue to be sought after in the used car market. While diesel’s popularity has fluctuated, the 730Ld remains a desirable option for buyers seeking a refined and economical luxury sedan. Its advanced features, comfortable ride, and spacious interior ensure it remains a competitive offering even years after its production ended.
