The BMW 4 Series Coupe (G22 LCI), specifically the M440d xDrive Steptronic model, represents a mid-cycle refresh of the G22 generation, introduced in March 2024. This variant occupies a performance-oriented position within the 4 Series lineup, blending diesel efficiency with potent power output and all-wheel drive capability. The “LCI” (Life Cycle Impulse) facelift brought styling revisions, updated technology, and refinements to the powertrain. The M440d, with its mild-hybrid system, aims to deliver a balance of performance and reduced emissions, appealing to buyers seeking a sporty grand tourer.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (G22 LCI, facelift 2024) |
| Type (Engine) | M440d (340 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | March, 2024 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Combined fuel consumption (WLTP) | 6.1-6.7 l/100 km (38.6 – 35.1 US mpg, 46.3 – 42.2 UK mpg, 16.4 – 14.9 km/l) |
| CO2 emissions (WLTP) | 160-175 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 4.6 sec |
| Acceleration 0 – 62 mph | 4.6 sec |
| Acceleration 0 – 60 mph | 4.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6e |
| Weight-to-power ratio | 5.4 kg/Hp, 186.8 Hp/tonne |
| Weight-to-torque ratio | 2.6 kg/Nm, 384.6 Nm/tonne |
| Gross battery capacity | 0.4 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the front hood |
| Electric motor power | 11 Hp |
| Electric motor Torque | 25 Nm (18.44 lb.-ft.) |
| 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 | B57 |
| 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 | 1820 kg (4012.41 lbs.) |
| Max. weight | 2305 kg (5081.66 lbs.) |
| Max load | 485 kg (1069.24 lbs.) |
| Trunk (boot) space – minimum | 440 l (15.54 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4770 mm (187.8 in.) |
| Width | 1852 mm (72.91 in.) |
| Width including mirrors | 2081 mm (81.93 in.) |
| Height | 1393 mm (54.84 in.) |
| Wheelbase | 2851 mm (112.24 in.) |
| Front track | 1583 mm (62.32 in.) |
| Rear (Back) track | 1592 mm (62.68 in.) |
| Front overhang | 858 mm (33.78 in.) |
| Rear overhang | 1061 mm (41.77 in.) |
| Ride height (ground clearance) | 129 mm (5.08 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle (turning diameter) | 12 m (39.37 ft.) |
| Drivetrain Architecture | ICE and electric motor drive all four wheels, operating in mixed mode. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Spring Strut, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| 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: 225/45 R18, Rear: 255/40 R18 |
| Wheel rims size | Front: 7.5J x 18, Rear: 8.5J x 18 |
Powertrain & Engine Architecture
The heart of the M440d is BMW’s B57 3.0-liter inline-six diesel engine. This engine benefits from a comprehensive update for the LCI model, incorporating the latest generation of common-rail direct injection technology and a two-stage turbocharging system. The first turbocharger provides immediate response at low engine speeds, while the second, larger turbocharger delivers increased power at higher RPMs. The engine produces 340 horsepower at 4400 rpm and a substantial 700 Nm (516 lb-ft) of torque between 1750 and 2250 rpm. The mild-hybrid system, utilizing a 48V lithium-ion battery and an integrated starter generator, provides an additional 11 horsepower and 25 Nm (18 lb-ft) of torque, assisting during acceleration and enabling smoother start-stop operation. The engine’s layout is front-mounted and longitudinal. The Steptronic 8-speed automatic transmission is standard, optimized for both performance and efficiency. It features quick and smooth gear changes, and adapts to the driver’s style.
Driving Characteristics
The M440d xDrive delivers a refined yet engaging driving experience. The combination of the potent diesel engine and the all-wheel-drive system results in a 0-60 mph time of approximately 4.4 seconds. The mild-hybrid system contributes to a near-instantaneous power delivery, minimizing turbo lag. The Steptronic transmission is well-tuned, providing seamless gear changes and contributing to the car’s overall smoothness. Compared to lower-powered 4 Series variants, the M440d offers significantly more acceleration and a more confident feel, particularly during overtaking maneuvers. While not as overtly sporty as the M4, the M440d provides a compelling balance of performance and everyday usability. The xDrive system provides excellent traction in various weather conditions.
Equipment & Trim Levels
The M440d xDrive typically comes well-equipped as standard. Key features include BMW’s Live Cockpit Professional (digital instrument cluster and infotainment system), leather upholstery, sport seats, automatic climate control, and a comprehensive suite of driver-assistance systems. Optional extras include a premium sound system, adaptive suspension, head-up display, and various interior trim options. The LCI facelift brought updated interior materials and a redesigned center console. The M Sport package is a popular option, adding more aggressive styling cues, sport suspension, and larger brakes.
Chassis & Braking
The 4 Series Coupe features a sophisticated chassis design, incorporating a MacPherson strut front suspension and a multi-link rear suspension. The M440d benefits from a slightly stiffer suspension setup compared to lower-powered models, enhancing handling and stability. Ventilated disc brakes are fitted to all four wheels, providing ample stopping power. The xDrive all-wheel-drive system utilizes a multi-plate clutch to distribute torque between the front and rear axles, optimizing traction and stability. The electronic power steering provides precise and responsive steering feel.
Market Reception & Comparison
The M440d xDrive has been generally well-received by automotive critics. It is praised for its strong performance, refined ride quality, and fuel efficiency. Compared to the gasoline-powered M440i, the M440d offers superior fuel economy and a broader torque curve, making it a more practical choice for long-distance driving. However, some critics note that the diesel engine lacks the aural excitement of the gasoline counterpart. Against competitors like the Audi S5 TDI and Mercedes-AMG C 43 diesel, the M440d holds its own in terms of performance, technology, and overall refinement.
Legacy
The B57 engine family has proven to be remarkably reliable, and the M440d powertrain is expected to offer long-term durability. The mild-hybrid system adds a layer of complexity, but BMW has a strong track record in hybrid technology. On the used car market, the G22 4 Series M440d is likely to hold its value well, appealing to buyers seeking a sporty, efficient, and well-equipped grand tourer. The LCI facelift models, with their updated styling and technology, are expected to command a premium.
