The BMW 840d xDrive, part of the G15 LCI (Life Cycle Impulse) facelift introduced in March 2022, represents a compelling blend of performance and efficiency within the 8 Series Coupe range. Positioned as a mid-range offering, it slots between the entry-level 830d and the higher-performance M850i. This variant combines a turbocharged inline-six diesel engine with mild hybrid technology and BMW’s xDrive all-wheel-drive system, targeting buyers seeking a luxurious grand tourer with strong torque and respectable fuel economy. The LCI facelift brought subtle styling updates, enhanced technology, and refined engine calibrations to the already well-regarded 8 Series.
Technical Specifications
| Brand | BMW |
| Model | 8 Series |
| Generation | 8 Series Coupe (G15 LCI, facelift 2022) |
| Type (Engine) | 840d (340 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | March, 2022 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Combined fuel consumption (WLTP) | 6.5-6.8 l/100 km (36.2 – 34.6 US mpg, 43.5 – 41.5 UK mpg, 15.4 – 14.7 km/l) |
| CO2 emissions (WLTP) | 170-179 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 4.8 sec |
| Acceleration 0 – 62 mph | 4.8 sec |
| Acceleration 0 – 60 mph | 4.6 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 5.6 kg/Hp, 177.5 Hp/tonne |
| Weight-to-torque ratio | 2.7 kg/Nm, 365.5 Nm/tonne |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the front hood |
| Electric motor power | 11 Hp |
| Electric motor location | Front, Longitudinal |
| 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 |
| Valvetrain | DOHC |
| Engine oil capacity | 7 l (7.4 US qt | 6.16 UK qt) |
| Kerb Weight | 1915 kg (4221.85 lbs.) |
| Max. weight | 2410 kg (5313.14 lbs.) |
| Max load | 495 kg (1091.29 lbs.) |
| Trunk (boot) space – minimum | 420 l (14.83 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| AdBlue tank | 18.5 l (4.89 US gal | 4.07 UK gal) |
| Length | 4851 mm (190.98 in.) |
| Width | 1902 mm (74.88 in.) |
| Width including mirrors | 2137 mm (84.13 in.) |
| Height | 1346 mm (52.99 in.) |
| Wheelbase | 2822 mm (111.1 in.) |
| Front track | 1627 mm (64.06 in.) |
| Rear (Back) track | 1642 mm (64.65 in.) |
| Front overhang | 953 mm (37.52 in.) |
| Rear overhang | 1076 mm (42.36 in.) |
| Ride height (ground clearance) | 121 mm (4.76 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle (turning diameter) | 11.9 m (39.04 ft.) |
| Drivetrain Architecture | ICE and electric motor drive all four wheels, mixed mode operation |
| 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 | Front: 245/40 R19 or 245/35 R20; Rear: 275/35 R19 or 275/30 R20 |
| Wheel rims size | Front: 8J x 19 or 8J x 20; Rear: 9J x 19 or 9J x 20 |
Powertrain & Engine Architecture
The heart of the 840d xDrive is BMW’s B57D30B, a 3.0-liter inline-six diesel engine. This engine benefits from a sophisticated common-rail direct injection system, delivering fuel at extremely high pressures 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 lithium-ion battery and an integrated starter generator, provides a power boost during acceleration and enables smoother start-stop operation, improving efficiency. The Steptronic 8-speed automatic transmission is specifically tuned for the diesel engine’s torque characteristics, offering smooth and responsive shifts. The transmission features adaptive shift strategies, adjusting to the driver’s style and road conditions.
Driving Characteristics
The 840d xDrive delivers a refined and effortless driving experience. The abundant low-end torque from the diesel engine provides strong acceleration in everyday driving situations. While not as overtly sporty as the M850i, the 840d offers a 0-60 mph time of around 4.6 seconds, making it a genuinely quick grand tourer. The xDrive all-wheel-drive system provides excellent traction and stability, particularly in adverse weather conditions. The automatic transmission’s gear ratios are well-chosen, keeping the engine within its optimal power band. Compared to the 830d, the 840d offers a noticeable performance upgrade, while remaining more fuel-efficient than the gasoline-powered M850i.
Equipment & Trim Levels
The 840d xDrive typically comes well-equipped as standard. Interior features include leather upholstery, power-adjustable seats with memory function, a premium sound system, and BMW’s iDrive infotainment system with a large touchscreen display. Standard safety features include automatic emergency braking, lane departure warning, and adaptive cruise control. Optional extras include upgraded leather trim, a Bowers & Wilkins Diamond surround sound system, active roll stabilization, and various driver assistance packages. The interior design emphasizes luxury and comfort, with high-quality materials and meticulous attention to detail.
Chassis & Braking
The 8 Series Coupe features a sophisticated chassis designed for both comfort and handling. The front suspension utilizes a double-wishbone setup, while the rear employs an independent multi-link suspension. This configuration provides a smooth and controlled ride, even on uneven surfaces. The 840d xDrive is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The braking system is enhanced by ABS, electronic brakeforce distribution, and brake assist. The steering is precise and well-weighted, offering good feedback to the driver.
Market Reception & Comparison
The 840d xDrive was generally well-received by automotive critics. It was praised for its refined driving experience, strong performance, and impressive fuel economy. Compared to the 830d, the 840d offered a significant power upgrade without sacrificing fuel efficiency. Against the M850i, it provided a more balanced combination of performance and economy. Some reviewers noted that the diesel engine’s character wasn’t as engaging as the gasoline engine in the M850i, but the 840d’s torque advantage made it a strong performer in real-world driving conditions.
Legacy
The B57 engine family, including the B57D30B found in the 840d, has proven to be remarkably reliable. With proper maintenance, these engines are known to withstand high mileage. The mild hybrid system adds a layer of complexity, but has also demonstrated good durability. On the used car market, the 840d xDrive represents a compelling value proposition, offering a luxurious and capable grand tourer at a more accessible price point than the M850i. Its combination of performance, efficiency, and refinement ensures its continued appeal to discerning buyers.
