The BMW 6 Series Gran Turismo (G32) facelift, specifically the 630d variant introduced in 2020 and produced through 2023, represents a unique offering within BMW’s luxury vehicle lineup. Positioned as a grand tourer, it blended the spaciousness of a touring car with the sleek styling of a coupe. This iteration, designated as the LCI (Life Cycle Impulse) model, featured updated styling, enhanced technology, and a focus on efficient performance. The 630d, equipped with a mild-hybrid diesel powertrain and xDrive all-wheel drive, aimed to deliver a refined driving experience with improved fuel economy. It occupied a mid-range position within the 6 Series Gran Turismo lineup, offering a balance between performance and practicality.
Technical Specifications
| Brand | BMW |
| Model | 6 Series |
| Generation | 6 Series Gran Turismo (G32 LCI, facelift 2020) |
| Type (Engine) | 630d (286 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | 2020 |
| End of production | 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Grand Tourer |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.4-6.7 l/100 km (36.8 – 35.1 US mpg) |
| Fuel consumption (extra urban) | 4.4-4.6 l/100 km (53.5 – 51.1 US mpg) |
| Fuel consumption (combined) | 5.1-5.3 l/100 km (46.1 – 44.4 US mpg) |
| CO2 emissions | 135-140 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.9 sec |
| Acceleration 0 – 62 mph | 5.9 sec |
| Acceleration 0 – 60 mph | 5.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | EURO 6d |
| Weight-to-power ratio | 7 kg/Hp |
| Weight-to-torque ratio | 3.1 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 | B57D30B |
| 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) |
| Kerb Weight | 1990 kg (4387.2 lbs.) |
| Max. weight | 2640 kg (5820.2 lbs.) |
| Max load | 650 kg (1433 lbs.) |
| Trunk (boot) space – minimum | 600 l (21.19 cu. ft.) |
| Trunk (boot) space – maximum | 1800 l (63.57 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Max. roof load | 75 kg (165.35 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 | 5091 mm (200.43 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1540 mm (60.63 in.) |
| Wheelbase | 3070 mm (120.87 in.) |
| Front track | 1615 mm (63.58 in.) |
| Rear track | 1647 mm (64.84 in.) |
| Ride height (ground clearance) | 138 mm (5.43 in.) |
| Drag coefficient (Cd) | 0.25 |
| Minimum turning circle | 12.5 m (41.01 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 |
| 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 | 225/60 R17 99Y |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
The heart of the 630d is BMW’s B57D30B 3.0-liter inline-six diesel engine. This engine benefits from a mild-hybrid (MHEV) system, incorporating a 48V starter-generator. This system provides a power boost during acceleration, enables smoother start-stop operation, and contributes to improved fuel efficiency. The engine utilizes a sophisticated diesel commonrail fuel injection system and a twin-power turbocharger with an intercooler, delivering a robust 286 horsepower at 4000 rpm and a substantial 650 Nm (479.42 lb.-ft.) of torque between 1500 and 2500 rpm. The engine’s high compression ratio of 16.5:1 is typical for modern diesel engines, optimizing combustion efficiency. 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 responsiveness. This transmission is integral to managing the engine’s torque output and optimizing fuel economy.
Driving Characteristics
The 630d’s driving experience is characterized by a blend of comfort and performance. The mild-hybrid system provides a noticeable boost in responsiveness, particularly during overtaking maneuvers. While not as overtly sporty as some of its gasoline-powered siblings, the 630d delivers ample power for effortless cruising and confident acceleration. The 8-speed automatic transmission is well-tuned, providing seamless gear changes and contributing to a relaxed driving experience. Compared to higher-output 6 Series variants, the 630d prioritizes fuel efficiency and refinement over outright speed. The xDrive all-wheel-drive system provides excellent traction in various weather conditions, enhancing stability and control. The gear ratios are optimized for both highway cruising and responsive acceleration in urban environments.
Equipment & Trim Levels
The 630d Gran Turismo typically came well-equipped as standard. Features included leather upholstery, power-adjustable front seats with memory function, a premium sound system, and a comprehensive suite of driver-assistance systems such as lane departure warning, forward collision warning, and automatic emergency braking. The infotainment system featured a large touchscreen display with BMW’s iDrive controller. Optional extras included features like adaptive cruise control, a head-up display, panoramic sunroof, and upgraded interior trim options. The interior design emphasized luxury and spaciousness, with high-quality materials and a focus on passenger comfort.
Chassis & Braking
The 6 Series Gran Turismo utilizes a double-wishbone front suspension and an independent multi-link rear suspension, providing a comfortable and controlled ride. The suspension is tuned to balance handling and ride quality, making it suitable for long-distance journeys. The 630d is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The electronic stability control (ESC) system and anti-lock braking system (ABS) work in conjunction to enhance safety and stability. The xDrive all-wheel-drive system distributes power between the front and rear axles as needed, optimizing traction and handling.
Market Reception & Comparison
The 630d Gran Turismo was generally well-received by automotive critics, who praised its spacious interior, comfortable ride, and efficient engine. However, some reviewers noted that the Gran Turismo’s styling was not to everyone’s taste. Compared to the 640i gasoline variant, the 630d offered superior fuel economy and a more relaxed driving experience, but with slightly less outright performance. Against other diesel-powered luxury touring cars, the 630d stood out for its refined engine, sophisticated technology, and BMW’s reputation for build quality. Its fuel economy figures were competitive within its segment, making it an attractive option for drivers who prioritize efficiency.
Legacy
The BMW 6 Series Gran Turismo (G32) was discontinued in 2023, but the 630d variant remains a desirable option in the used car market. The B57 diesel engine is known for its reliability and longevity, provided it is properly maintained. The mild-hybrid system adds a layer of complexity, but has generally proven to be durable. The 630d’s combination of luxury, practicality, and efficiency continues to appeal to buyers seeking a refined grand touring experience. Regular maintenance, including oil changes and adherence to BMW’s recommended service intervals, is crucial for ensuring the long-term reliability of this powertrain.
