The BMW 6 Series Gran Turismo (G32) 630d xDrive Steptronic, produced from 2017 to 2020, represents BMW’s attempt to blend the luxury and performance of the 6 Series with the practicality of a Gran Turismo body style. Positioned as a mid-range offering within the G32 lineup, it aimed to provide a balance between fuel efficiency, comfortable long-distance cruising, and all-weather capability thanks to its xDrive all-wheel-drive system. This variant occupied a space between the entry-level 630i gasoline models and the higher-performance 640d, targeting buyers who prioritized torque and fuel economy over outright speed. The G32 Gran Turismo was primarily marketed in Europe and Asia, where the combination of a spacious interior, hatchback practicality, and efficient diesel power was highly valued.
Technical Specifications
| Brand | BMW |
| Model | 6 Series |
| Generation | 6 Series Gran Turismo (G32) |
| Type (Engine) | 630d (265 Hp) xDrive Steptronic |
| Start of production | 2017 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Grand Tourer |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.5-6.7 l/100 km (36.2 – 35.1 US mpg) |
| Fuel consumption (extra urban) | 4.9-5.4 l/100 km (48 – 43.6 US mpg) |
| Fuel consumption (combined) | 5.5-5.9 l/100 km (42.8 – 39.9 US mpg) |
| CO2 emissions | 144-154 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6 sec |
| Acceleration 0 – 62 mph | 6 sec |
| Acceleration 0 – 60 mph | 5.7 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.1 kg/Hp, 141 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 329.8 Nm/tonne |
| Power | 265 Hp @ 4000 rpm |
| Torque | 620 Nm @ 2000-2500 rpm (457.29 lb.-ft. @ 2000-2500 rpm) |
| 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 | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 11.7 l (12.36 US qt | 10.29 UK qt) |
| Kerb Weight | 1880 kg (4144.69 lbs.) |
| Max. weight | 2580 kg (5687.93 lbs.) |
| Max load | 700 kg (1543.24 lbs.) |
| Trunk (boot) space – minimum | 610 l (21.54 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.) |
| Width including mirrors | 2158 mm (84.96 in.) |
| Height | 1540 mm (60.63 in.) |
| Wheelbase | 3070 mm (120.87 in.) |
| Front track | 1615 mm (63.58 in.) |
| Rear (Back) track | 1647 mm (64.84 in.) |
| Front overhang | 871 mm (34.29 in.) |
| Rear overhang | 1150 mm (45.28 in.) |
| Ride height (ground clearance) | 138 mm (5.43 in.) |
| Drag coefficient (Cd) | 0.26 |
| Minimum turning circle (turning diameter) | 12.5 m (41.01 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 | 225/60 R17; 245/50 R18; 245/45 R19; 275/40 R19; 245/40 R20; 275/35 R20 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 19; 9.5J x 19; 8.5J x 20; 10J x 20 |
Powertrain & Engine Architecture
The 630d Gran Turismo is powered by the BMW B57D30A, a 3.0-liter inline-six diesel engine. This engine is a member of the modular BMW engine family, known for its robust construction and advanced technology. The B57 features a common-rail direct fuel injection system operating at extremely high pressures (2,200 bar) for optimized combustion. It utilizes a variable geometry turbocharger and an intercooler to enhance power and efficiency. The engine also incorporates BMW’s BluePower technology, including a diesel particulate filter and NOx catalyst to meet stringent Euro 6 emission standards. The eight-speed Steptronic automatic transmission is a key component, offering smooth and efficient gear changes. This transmission is known for its quick response and ability to adapt to driving conditions. The xDrive all-wheel-drive system distributes power between the front and rear axles as needed, providing enhanced traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The 630d xDrive Steptronic delivers a refined and comfortable driving experience. The engine’s substantial 620 Nm (457 lb-ft) of torque, available from 2000-2500 rpm, provides strong acceleration and effortless overtaking. While not as overtly sporty as the 640d, the 630d offers a respectable 0-60 mph time of around 5.7 seconds. The eight-speed automatic transmission contributes to smooth progress, and the xDrive system inspires confidence in all conditions. Compared to the 630i gasoline variant, the 630d offers superior fuel economy and a more relaxed cruising character. However, it lacks the higher-revving enthusiasm of the gasoline engine. The gear ratios are tuned for efficiency and comfortable highway cruising, rather than outright performance. The steering is precise and well-weighted, providing a connected feel to the road.
Equipment & Trim Levels
The 630d xDrive Steptronic typically came well-equipped as standard. Common features included leather upholstery, power-adjustable front seats with memory function, a premium sound system, and a large infotainment screen with BMW’s iDrive system. Standard safety features included automatic emergency braking, lane departure warning, and adaptive cruise control. Optional extras included a panoramic sunroof, upgraded leather trim, ventilated front seats, and a head-up display. The Gran Turismo’s hatchback design provides a large and versatile cargo area, accessible via a power-operated tailgate. Interior trim options ranged from elegant wood veneers to modern aluminum accents.
Chassis & Braking
The G32 Gran Turismo features a double-wishbone front suspension and an independent multi-link rear suspension, providing a comfortable and controlled ride. The suspension is tuned to balance ride comfort with handling precision. The 630d typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) and Electronic Stability Control (ESC) systems enhance safety and stability. The steering system is an electric power steering setup, offering precise and responsive control.
Market Reception & Comparison
The 630d xDrive Steptronic was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and spacious interior. The fuel economy was also a significant selling point, particularly in Europe. Compared to the 640d, the 630d offered a more affordable entry point into the 6 Series Gran Turismo range, while still providing a luxurious and capable driving experience. However, some critics noted that the 630d lacked the outright performance of its more powerful sibling. Against competitors like the Audi A7 Sportback and Mercedes-Benz CLS, the 630d offered a unique blend of practicality, luxury, and efficiency.
Legacy
The B57 engine family, including the B57D30A found in the 630d, has proven to be remarkably reliable. These engines are known for their durability and longevity, provided they are properly maintained. The 630d Gran Turismo, while not a high-volume seller, has established a reputation as a comfortable and practical grand tourer. On the used car market, these models represent a good value proposition, offering a luxurious and well-equipped vehicle at a reasonable price. Regular maintenance, including oil changes and filter replacements, is crucial to ensure the long-term reliability of the B57 engine and the Steptronic transmission.
