The BMW 4 Series Gran Coupe (G26) M440i xDrive Steptronic, produced from June 2021 to June 2024, represents a compelling blend of performance, luxury, and practicality within the 4 Series Gran Coupe lineup. Positioned as a high-performance variant, it slots above the 430i models and below the fully-fledged M4 Gran Coupe, offering a significant power upgrade with the added benefit of mild hybrid technology. This four-door coupe, built on the G26 platform, aimed to appeal to buyers seeking a sporty driving experience without sacrificing the space and convenience of a traditional sedan. The M440i’s introduction further solidified BMW’s commitment to offering a diverse range of powertrain options within the 4 Series family.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (G26) |
| Type | M440i (374 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | June, 2021 |
| End of production | June, 2024 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Coupe |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 8-8.5 l/100 km (29.4 – 27.7 US mpg, 35.3 – 33.2 UK mpg, 12.5 – 11.8 km/l) |
| CO2 emissions (WLTP) | 181-194 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.7 sec |
| Acceleration 0 – 62 mph | 4.7 sec |
| Acceleration 0 – 60 mph | 4.5 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 4.9 kg/Hp, 204.9 Hp/tonne |
| Weight-to-torque ratio | 3.7 kg/Nm, 274 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 | 374 Hp @ 5500-6500 rpm |
| Torque | 500 Nm @ 1900-5000 rpm (368.78 lb.-ft. @ 1900-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30B |
| Engine displacement | 2998 cm3 (182.95 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Valvetrain | Double-VANOS, VALVETRONIC |
| Engine oil capacity | 7.2 l (7.61 US qt | 6.34 UK qt) |
| Coolant | 10.5 l (11.1 US qt | 9.24 UK qt) |
| Kerb Weight | 1825 kg (4023.44 lbs.) |
| Max. weight | 2380 kg (5247 lbs.) |
| Max load | 555 kg (1223.57 lbs.) |
| Trunk (boot) space – minimum | 470 l (16.6 cu. ft.) |
| Trunk (boot) space – maximum | 1290 l (45.56 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 | 4783 mm (188.31 in.) |
| Width | 1852 mm (72.91 in.) |
| Height | 1442 mm (56.77 in.) |
| Wheelbase | 2856 mm (112.44 in.) |
| Front track | 1587 mm (62.48 in.) |
| Rear (Back) track | 1614 mm (63.54 in.) |
| Ride height (ground clearance) | 140 mm (5.51 in.) |
| Drag coefficient (Cd) | 0.30 |
| 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 | 245/45 R18 |
| Wheel rims size | 8.5J x 18 |
Powertrain & Engine Architecture
At the heart of the M440i lies BMW’s B58B30B 3.0-liter inline-six engine. This engine is a cornerstone of BMW’s modern powertrain strategy, known for its smooth power delivery and responsiveness. The B58 utilizes direct fuel injection, a twin-scroll turbocharger, and BMW’s VALVETRONIC variable valve timing and lift system, along with Double-VANOS variable camshaft timing. These technologies work in concert to optimize efficiency and performance across the engine’s operating range. The “mild hybrid” component consists of a 48-volt electrical system and a 11 hp electric motor integrated into the drivetrain. This system provides a power boost during acceleration, enables smoother start-stop operation, and allows for regenerative braking to recoup energy. The engine is paired with BMW’s eight-speed Steptronic automatic transmission, renowned for its quick and precise shifts. The transmission is specifically tuned to complement the engine’s characteristics, offering both automatic and manual shift modes.
Driving Characteristics
The M440i Gran Coupe delivers a refined yet engaging driving experience. The 374 horsepower and 368 lb-ft of torque provide brisk acceleration, with a 0-60 mph time of around 4.5 seconds. The mild hybrid system contributes to a noticeable improvement in off-the-line responsiveness. The eight-speed automatic transmission shifts smoothly and efficiently, and the driver can take control with paddle shifters for a more involved experience. Compared to the 430i models, the M440i offers a substantial increase in power and torque, resulting in a more dynamic and confident feel. While not as track-focused as the M4, the M440i provides ample performance for everyday driving and spirited weekend excursions. The xDrive all-wheel-drive system ensures excellent traction and stability in various weather conditions.
Equipment & Trim Levels
The M440i Gran Coupe came standard with a comprehensive suite of features, including BMW’s iDrive infotainment system with a large touchscreen display, navigation, Apple CarPlay and Android Auto compatibility, a premium sound system, and a suite of advanced driver-assistance systems such as lane departure warning, forward collision warning, and automatic emergency braking. Interior appointments typically included leather upholstery, power-adjustable front seats with memory function, and a panoramic sunroof. Optional extras included upgraded leather options, a head-up display, adaptive cruise control, and a parking assistance package. The M Sport package, often selected by buyers, added unique exterior styling elements, sport seats, and a sport-tuned suspension.
Chassis & Braking
The G26 4 Series Gran Coupe features a sophisticated chassis design aimed at balancing comfort and handling. The front suspension utilizes a spring strut design with a transverse stabilizer, while the rear suspension employs an independent multi-link setup, also with a stabilizer bar. The M440i typically received slightly stiffer springs and dampers compared to the base models, enhancing its handling capabilities. Braking duties are handled by ventilated discs at all four corners, providing ample stopping power. The xDrive all-wheel-drive system intelligently distributes torque between the front and rear axles, optimizing traction and stability. The steering is precise and well-weighted, providing a connected feel to the driver.
Market Reception & Comparison
The BMW M440i Gran Coupe was generally well-received by automotive critics, who praised its potent powertrain, refined driving dynamics, and luxurious interior. It was often lauded as a compelling alternative to traditional sports sedans, offering a unique blend of performance and practicality. Compared to the 430i models, the M440i represented a significant step up in performance, justifying the higher price tag for enthusiasts. While the M4 Gran Coupe offered even more performance, the M440i provided a more balanced and accessible driving experience for a wider range of buyers. Fuel economy was respectable for a performance-oriented vehicle, averaging around 27-33 mpg in real-world driving.
Legacy
The B58 engine, found in the M440i, has proven to be a remarkably reliable and durable powerplant. With proper maintenance, these engines are known to withstand high mileage without major issues. The eight-speed Steptronic transmission is also generally considered to be robust and dependable. As a result, the M440i Gran Coupe holds its value relatively well in the used car market. The combination of performance, luxury, and practicality continues to appeal to buyers seeking a premium four-door coupe. The mild hybrid technology, while not as impactful as a full hybrid system, demonstrates BMW’s early adoption of electrification and contributes to improved fuel efficiency and reduced emissions.
