The BMW 4 Series Gran Coupe (G26 LCI), specifically the 430i xDrive Steptronic model, represents the facelifted iteration of the G26 generation, introduced in July 2024. This variant positions itself as a mid-range offering within the 4 Series Gran Coupe lineup, blending performance with practicality and incorporating BMW’s latest mild-hybrid technology. The G26 LCI builds upon the foundation of the original G26, which debuted as a more stylish and dynamically focused alternative to the traditional 3 Series sedan, offering a coupe-like profile with four-door convenience. The “LCI” designation signifies a Life Cycle Impulse, BMW’s term for a significant mid-cycle refresh.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (G26 LCI, facelift 2024) |
| Type (Engine) | 430i (255 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | July, 2024 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Coupe |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.4 l/100 km (25 US mpg) |
| Fuel consumption (extra urban) | 6.9 l/100 km (34.1 US mpg) |
| Fuel consumption (combined) | 8.1 l/100 km (29 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 5.7 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Weight-to-power ratio | 7.1 kg/Hp |
| Weight-to-torque ratio | 4.6 kg/Nm |
| Gross battery capacity | 0.4 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 11 Hp |
| Electric motor Torque | 25 Nm (18.44 lb.-ft.) |
| Power | 255 Hp @ 4700-6500 rpm |
| Torque | 400 Nm @ 1600-4500 rpm (295.02 lb.-ft.) |
| Engine Model/Code | B48B20O2 |
| Engine displacement | 1998 cm3 (121.93 cu. in.) |
| Number of cylinders | 4 |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 10.5:1 |
| Kerb Weight | 1823 kg (4019.03 lbs.) |
| Max. weight | 2350 kg (5180.86 lbs.) |
| Trunk (boot) space (min) | 470 l (16.6 cu. ft.) |
| Trunk (boot) space (max) | 1291 l (45.59 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal) |
| Length | 4787 mm (188.46 in.) |
| Width | 1852 mm (72.91 in.) |
| Height | 1442 mm (56.77 in.) |
| Wheelbase | 2856 mm (112.44 in.) |
| Number of gears | 8 |
| Gearbox type | Automatic (Steptronic) |
Powertrain & Engine Architecture
At the heart of the 430i xDrive lies BMW’s B48B20O2 2.0-liter turbocharged inline-four cylinder engine. This engine is a cornerstone of BMW’s current powertrain strategy, known for its blend of efficiency and performance. The “B48” designation indicates the engine family, while “B20O2” specifies the 2.0-liter displacement and the generation. The engine utilizes direct fuel injection, ensuring precise fuel delivery for optimal combustion. The turbocharger, coupled with BMW’s VALVETRONIC variable valve timing and Double-VANOS variable camshaft timing systems, optimizes both power and fuel efficiency across a wide range of engine speeds. The 48V mild-hybrid system adds a small electric motor integrated into the drivetrain, providing a boost during acceleration and enabling smoother start-stop operation. This system doesn’t allow for all-electric driving but contributes to improved fuel economy and reduced emissions. The engine is paired with BMW’s eight-speed Steptronic automatic transmission, renowned for its smooth and quick shifts. This transmission is programmed for both comfort and performance, adapting to the driver’s style.
Driving Characteristics
The 430i xDrive Steptronic delivers a refined and capable driving experience. The 255 horsepower and 295 lb-ft of torque provide brisk acceleration, with the 0-60 mph sprint achieved in 5.7 seconds. The eight-speed automatic transmission is well-matched to the engine’s characteristics, providing seamless gear changes and keeping the engine within its optimal power band. The xDrive all-wheel-drive system ensures excellent traction in various weather conditions, enhancing stability and confidence. Compared to the higher-performance 440i models, the 430i offers a more balanced approach, prioritizing comfort and fuel efficiency over outright speed. While the 440i’s six-cylinder engine delivers a more exhilarating experience, the 430i provides ample power for everyday driving and spirited weekend excursions. The mild-hybrid system contributes to a smoother and more responsive feel, particularly during initial acceleration.
Equipment & Trim Levels
The 430i xDrive Steptronic comes 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, and a premium sound system. Standard interior appointments include leatherette upholstery, power-adjustable front seats, and dual-zone automatic climate control. Optional extras include genuine leather upholstery, a panoramic sunroof, a head-up display, and advanced driver-assistance systems such as adaptive cruise control and lane-keeping assist. The LCI facelift brought updated interior trim options and revised exterior styling cues, including a redesigned kidney grille and new LED headlights.
Chassis & Braking
The 4 Series Gran Coupe utilizes a sophisticated chassis design, featuring a spring strut front suspension and an independent multi-link rear suspension. Both ends incorporate a stabilizer bar to minimize body roll during cornering. The xDrive system distributes power between the front and rear axles as needed, optimizing traction and stability. Braking duties are handled by ventilated discs at all four corners, providing ample stopping power. The electronic stability control system (DSC) further enhances safety by intervening to prevent skids and maintain control. The suspension tuning is geared towards a balance between comfort and handling, offering a compliant ride without sacrificing agility.
Market Reception & Comparison
The 430i xDrive Steptronic has been generally well-received by automotive critics, praised for its refined driving experience, comfortable interior, and attractive styling. Fuel economy figures of around 29 US mpg combined are competitive within its segment. Compared to other trims in the 4 Series lineup, the 430i offers a compelling value proposition, providing a good balance of performance, features, and price. While the 440i delivers more power, the 430i is often considered the sweet spot for buyers seeking a well-rounded and enjoyable grand tourer. Reliability reports suggest that the B48 engine is generally robust, although regular maintenance is crucial for long-term durability.
Legacy
The B48 engine, in various iterations, has become a mainstay in BMW’s lineup, proving to be a reliable and efficient powerplant. The 430i xDrive Steptronic, as a representative of the G26 LCI generation, is expected to hold its value reasonably well in the used car market. Its combination of practicality, performance, and modern technology makes it an appealing option for buyers seeking a premium four-door coupe. The mild-hybrid system, while not a revolutionary technology, represents a step towards greater fuel efficiency and reduced emissions, aligning with evolving automotive trends. As with any modern vehicle, regular maintenance and adherence to recommended service intervals will be key to ensuring the long-term reliability of the 430i xDrive Steptronic.
