The BMW 6 Series Gran Turismo (G32) facelift, introduced in 2020, represented a mid-cycle refresh of BMW’s unique blend of coupe styling and practical station wagon functionality. The 620d variant, powered by a 2.0-liter turbocharged diesel engine producing 190 horsepower and incorporating mild-hybrid technology, was a key offering within the G32 lineup from 2020 through 2023. Positioned as an entry-level option, it aimed to provide a balance of efficiency, comfort, and BMW’s signature driving experience, appealing to buyers prioritizing fuel economy and long-distance cruising over outright performance. This model occupied the lower end of the 6 Series Gran Turismo range, sitting below the more powerful 630d and 640i variants.
Technical Specifications
| Brand | BMW |
| Model | 6 Series |
| Generation | 6 Series Gran Turismo (G32 LCI, facelift 2020) |
| Type (Engine) | 620d (190 Hp) Mild Hybrid 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) | 5.0-5.1 l/100 km (47 – 46.1 US mpg) |
| Fuel consumption (extra urban) | 4.1-4.2 l/100 km (57.4 – 56 US mpg) |
| Fuel consumption (combined) | 4.4-4.6 l/100 km (53.5 – 51.1 US mpg) |
| CO2 emissions | 116-120 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.9 sec |
| Acceleration 0 – 62 mph | 7.9 sec |
| Acceleration 0 – 60 mph | 7.5 sec (Calculated) |
| Maximum speed | 220 km/h (136.7 mph) |
| Emission standard | EURO 6d |
| Weight-to-power ratio | 9.7 kg/Hp |
| Weight-to-torque ratio | 4.6 kg/Nm |
| Gross battery capacity | 0.528 kWh |
| Electric motor power | 11 Hp |
| Power | 190 Hp @ 4000 rpm |
| Torque | 400 Nm @ 1750-2500 rpm (295.02 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B47D20B |
| Engine displacement | 1995 cm3 (121.74 cu. in.) |
| Number of cylinders | 4 |
| 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 | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant capacity | 8.8 l (9.3 US qt | 7.74 UK qt) |
| Kerb Weight | 1835 kg (4045.48 lbs.) |
| Max. weight | 2490 kg (5489.51 lbs.) |
| Max load | 655 kg (1444.03 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 (braked) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load (unbraked) | 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 | 1538 mm (60.55 in.) |
| Wheelbase | 3070 mm (120.87 in.) |
| Front track | 1615 mm (63.58 in.) |
| Rear track | 1647 mm (64.84 in.) |
| Ride height | 138 mm (5.43 in.) |
| Drag coefficient (Cd) | 0.25 |
| Turning circle | 12.3 m (40.35 ft.) |
| Drivetrain | Rear wheel drive |
| Gearbox | 8-speed automatic (Steptronic) |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Steering | Electric Steering Rack and Pinion |
| Tire size | 225/60 R17 99Y |
| Wheel rims size | 7.5J x 17 |
INTRODUCTION
The G32 620d, launched in 2020 following the LCI (Life Cycle Impulse) facelift, is a five-door grand tourer that blends the practicality of a station wagon with the sleek aesthetics of a coupe. Built on the UKL2 platform shared with other BMW and MINI models, the Gran Turismo aimed to offer a more spacious and versatile alternative to traditional BMW coupes and sedans. The 620d variant specifically targeted buyers seeking a fuel-efficient and comfortable long-distance cruiser. The mild-hybrid system, a relatively new addition at the time, provided a small boost to efficiency and responsiveness.
Powertrain & Engine Architecture
At the heart of the 620d lies the BMW B47D20B, a 2.0-liter inline-four cylinder diesel engine. This engine is a member of BMW’s modular engine family, known for its compact design and advanced technology. It utilizes a second-generation common rail direct injection system operating at pressures up to 2,500 bar, ensuring precise fuel delivery and efficient combustion. The engine is turbocharged by a twin-scroll turbocharger with variable geometry turbine (VGT) technology, which optimizes boost pressure across a wider range of engine speeds. The mild-hybrid system consists of a 48V starter-generator, which provides a temporary power boost during acceleration and allows for smoother engine start-stop operation. The 8-speed Steptronic automatic transmission is standard, offering smooth and efficient gear changes. This transmission features a torque converter and allows for both automatic and manual shifting via steering wheel-mounted paddles.
Driving Characteristics
The 620d Gran Turismo delivers a comfortable and refined driving experience, prioritizing smoothness and quietness over outright performance. With 190 horsepower and 400 Nm (295 lb-ft) of torque, acceleration from 0 to 60 mph takes around 7.5 seconds. While not particularly sporty, the engine provides ample power for everyday driving and effortless highway cruising. The Steptronic transmission is well-tuned, offering seamless gear changes and contributing to the car’s relaxed demeanor. The long wheelbase and sophisticated suspension setup contribute to a comfortable ride, even on uneven surfaces. Compared to the more powerful 630d and 640i variants, the 620d feels less urgent in its acceleration, but its lower weight and improved fuel economy make it a compelling option for those prioritizing efficiency.
Equipment & Trim Levels
The 620d Gran Turismo typically came well-equipped as standard, reflecting BMW’s premium positioning. Standard features included leather upholstery, power-adjustable front seats, a 10.25-inch touchscreen infotainment system with iDrive controller, navigation, automatic climate control, and a suite of safety features such as lane departure warning and automatic emergency braking. Optional extras included a panoramic sunroof, upgraded audio system, adaptive cruise control, and various interior trim options. Trim levels varied by market, but generally offered packages that bundled popular options together. The interior design emphasized spaciousness and comfort, with a focus on high-quality materials and a user-friendly layout.
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 prioritize comfort, but still offers decent handling characteristics. Ventilated disc brakes are fitted to all four wheels, providing ample stopping power. The car’s electronic stability control system (DSC) helps to maintain stability in challenging driving conditions. The steering is electrically assisted, offering precise and responsive control. The 620d’s weight of approximately 1835 kg (4045 lbs) is relatively moderate for a vehicle of its size, contributing to its balanced handling.
Market Reception & Comparison
The 620d Gran Turismo received mixed reviews from automotive critics. While praised for its spaciousness, comfort, and fuel efficiency, some critics found its styling polarizing and its driving dynamics less engaging than those of more traditional BMW models. Compared to the 630d, the 620d offered significantly better fuel economy but lacked the same level of performance. Against competitors such as the Audi A7 Sportback and Mercedes-Benz CLS, the 6 Series Gran Turismo offered a unique blend of practicality and style, but its higher price point and unconventional design limited its appeal to a niche market.
Legacy
The BMW 6 Series Gran Turismo, including the 620d variant, represents an interesting experiment in BMW’s model range. While production ended in 2023, the G32 remains a relatively uncommon sight on the road. The B47D20B engine has proven to be generally reliable, although regular maintenance is crucial to prevent issues with the diesel particulate filter (DPF) and fuel injection system. On the used car market, the 620d offers a compelling value proposition for buyers seeking a spacious, comfortable, and fuel-efficient grand tourer. Its mild-hybrid technology, while not groundbreaking, demonstrates BMW’s early efforts to improve fuel economy and reduce emissions.
