The BMW 840d xDrive Gran Coupe (G16) represents a compelling blend of performance, luxury, and efficiency within the 8 Series lineup. Introduced in November 2020 and produced through March 2022, this variant utilizes a 3.0-liter inline-six diesel engine coupled with a 48-volt mild hybrid system and an eight-speed Steptronic automatic transmission. Positioned as a mid-range offering, the 840d aimed to provide a more economical alternative to the gasoline-powered 840i and the high-performance M8, while still delivering a refined and engaging driving experience. It slots into the Gran Coupe body style, a four-door coupe offering increased practicality compared to the standard 8 Series Coupe.
Technical Specifications
| Brand | BMW |
| Model | 8 Series |
| Generation | 8 Series Gran Coupe (G16) |
| Type (Engine) | 840d (340 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | November, 2020 |
| End of production | March, 2022 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Coupe |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 7.1-7.4 l/100 km (33.1 – 31.8 US mpg) |
| Fuel consumption (extra urban) | 4.7-5.0 l/100 km (50 – 47 US mpg) |
| Fuel consumption (combined) | 5.6-5.9 l/100 km (42 – 39.9 US mpg) |
| CO2 emissions | 148-155 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.0 sec |
| Acceleration 0 – 62 mph | 5.0 sec |
| Acceleration 0 – 60 mph | 4.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 5.9 kg/Hp |
| Weight-to-torque ratio | 2.9 kg/Nm |
| Electric motor power | 11 Hp |
| Power | 340 Hp @ 4400 rpm |
| Torque | 700 Nm @ 1750-2250 rpm (516.29 lb.-ft. @ 1750-2250 rpm) |
| 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) |
| Coolant capacity | 10.2 l (10.78 US qt | 8.97 UK qt) |
| Kerb Weight | 1995 kg (4398.22 lbs.) |
| Max. weight | 2600 kg (5732.02 lbs.) |
| Max load | 605 kg (1333.8 lbs.) |
| Trunk (boot) space (minimum) | 440 l (15.54 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Length | 5074 mm (199.76 in.) |
| Width | 1932 mm (76.06 in.) |
| Height | 1401 mm (55.16 in.) |
| Wheelbase | 3023 mm (119.02 in.) |
| Front track | 1627 mm (64.06 in.) |
| Rear track | 1671 mm (65.79 in.) |
| Ride height (ground clearance) | 121 mm (4.76 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle | 12.6 m (41.34 ft.) |
| Drivetrain Architecture | All wheel drive (4×4) with Mild Hybrid system |
| Number of gears | 8 |
| Gearbox type | Automatic (Steptronic) |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
The heart of the 840d is BMW’s B57D30B 3.0-liter inline-six diesel engine. This engine benefits from a sophisticated common-rail direct injection system, delivering fuel at pressures up to 2,500 bar for optimized combustion. A twin-scroll turbocharger, coupled with intercooling, provides ample boost, contributing to the engine’s substantial 700 Nm (516 lb-ft) of torque. The mild hybrid system, utilizing a 48V starter-generator, adds a small power boost (11 hp) and enables features like extended start-stop operation and coasting with the engine switched off, improving fuel efficiency. The engine is longitudinally mounted, powering all four wheels through BMW’s xDrive all-wheel-drive system. The eight-speed Steptronic automatic transmission is a crucial component, offering smooth and quick shifts. It’s programmed for both comfort and performance, adapting to the driver’s style.
Driving Characteristics
The 840d xDrive Gran Coupe delivers a refined and effortless driving experience. The abundant torque, available from as low as 1750 rpm, provides strong acceleration in virtually any gear. While not as overtly sporty as the M8, the 840d’s 5.0-second 0-60 mph time is more than adequate for most drivers. The Steptronic transmission is well-matched to the engine, providing seamless gear changes. The xDrive system ensures excellent traction in all weather conditions. The suspension, tuned for comfort, absorbs bumps effectively, while still providing a reasonably controlled ride. Compared to the 840i (gasoline), the 840d offers superior fuel economy and a more relaxed cruising experience, albeit with slightly less peak horsepower.
Equipment & Trim Levels
The 840d xDrive Gran Coupe came standard with a high level of equipment, befitting its luxury positioning. Standard features included leather upholstery, power-adjustable 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 upgraded leather options, individual interior trim choices, a Bowers & Wilkins Diamond surround sound system, active roll stabilization, and various driver-assistance systems like adaptive cruise control and lane-keeping assist. The Gran Coupe body style itself added practicality with its four doors and larger rear seating area compared to the coupe.
Chassis & Braking
The 840d Gran Coupe utilizes a robust chassis with a double-wishbone front suspension and an independent multi-link rear suspension. This setup provides a good balance between comfort and handling. Ventilated disc brakes are fitted on all four wheels, providing ample stopping power. The electronic stability control system (DSC) works in conjunction with the xDrive all-wheel-drive system to maintain stability and control. The steering is electrically assisted, offering precise and responsive feel.
Market Reception & Comparison
The 840d xDrive Gran Coupe was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. The fuel economy was a significant selling point, particularly in Europe where diesel engines are more popular. Compared to the 840i, the 840d offered a more economical option without sacrificing too much performance. However, some critics noted that the diesel engine lacked the aural excitement of the gasoline counterpart. Against competitors like the Mercedes-Benz S-Class Coupe and the Porsche Panamera, the 840d offered a unique blend of style, performance, and practicality.
Legacy
The B57 engine family, including the B57D30B used in the 840d, has proven to be remarkably reliable. With proper maintenance, these engines can accumulate high mileage without major issues. The 840d xDrive Gran Coupe, while not the highest-volume seller in the 8 Series range, has established a reputation as a comfortable, efficient, and well-equipped grand tourer. On the used car market, these models hold their value reasonably well, appealing to buyers seeking a luxurious and capable vehicle with good fuel economy. The mild hybrid technology, while relatively early in its adoption, has contributed to the vehicle’s overall efficiency and longevity.
