The BMW 4 Series Gran Coupe (G26) 430i xDrive Steptronic represents BMW’s entry into the premium four-door coupe market, blending the styling of a coupe with the practicality of a sedan. Introduced in March 2022 and continuing through June 2024, this variant occupies a mid-range position within the G26 lineup, offering a balance between performance, luxury, and efficiency. It builds upon the success of the G26 platform, which aimed to deliver a more dynamic and sophisticated driving experience compared to its predecessor, the 3 Series Gran Turismo.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (G26) |
| Type | 430i (245 Hp) xDrive Steptronic |
| Start of production | March, 2022 |
| End of production | June, 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 7.1-7.9 l/100 km (33.1 – 29.8 US mpg, 39.8 – 35.8 UK mpg, 14.1 – 12.7 km/l) |
| CO2 emissions (WLTP) | 162-180 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.1 sec |
| Acceleration 0 – 62 mph | 6.1 sec |
| Acceleration 0 – 60 mph | 5.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 6.9 kg/Hp, 144.1 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 235.3 Nm/tonne |
| Power | 245 Hp @ 4500-6500 rpm |
| Power per litre | 122.6 Hp/l |
| Torque | 400 Nm @ 1600-4000 rpm (295.02 lb.-ft. @ 1600-4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B48B20B |
| Engine displacement | 1998 cm3 (121.93 cu. in.) |
| Number of cylinders | 4 |
| 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 | VALVETRONIC |
| Engine oil capacity | 5.75 l (6.08 US qt | 5.06 UK qt) |
| Kerb Weight | 1700 kg (3747.86 lbs.) |
| Max. weight | 2255 kg (4971.42 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 | 1597 mm (62.87 in.) |
| Rear (Back) track | 1624 mm (63.94 in.) |
| Ride height (ground clearance) | 140 mm (5.51 in.) |
| Drag coefficient (Cd) | 0.26 |
| Minimum turning circle (turning diameter) | 12 m (39.37 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| 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 | 225/55 R17 |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
At the heart of the 430i xDrive Steptronic lies the BMW B48B20B 2.0-liter inline-four cylinder engine. This engine is a member of BMW’s modular engine family, known for its efficiency and performance. It utilizes direct fuel injection, a twin-scroll turbocharger, and BMW’s VALVETRONIC variable valve timing and lift system. VALVETRONIC allows for precise control of valve timing and lift, optimizing engine performance and fuel economy across a wide range of driving conditions. The engine produces 245 horsepower at 4500-6500 rpm and 295 lb-ft of torque between 1600-4000 rpm. This power is then sent to all four wheels via BMW’s xDrive all-wheel-drive system and an 8-speed Steptronic automatic transmission. The Steptronic transmission offers smooth and quick shifts, and includes features like launch control and shift paddles for more engaging driving.
Driving Characteristics
The 430i xDrive Steptronic delivers a refined and capable driving experience. While not as overtly sporty as the M440i, it provides ample power for everyday driving and confident passing maneuvers. The xDrive all-wheel-drive system provides excellent traction in various weather conditions. The 8-speed automatic transmission is well-tuned, offering smooth gear changes and responsive performance. Compared to a manual transmission equipped 430i, the automatic prioritizes comfort and ease of use, though it may slightly diminish the driver’s sense of connection to the vehicle. The gear ratios are optimized for both fuel efficiency and acceleration, providing a good balance between the two.
Equipment & Trim Levels
The 430i xDrive Steptronic typically comes standard with a comprehensive list of features, including BMW’s iDrive infotainment system with a 14.9-inch 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 upholstery is typically a combination of synthetic leather and cloth, with options for genuine leather upgrades. Available options include a panoramic sunroof, heated seats, a head-up display, and a more powerful Harman Kardon sound system.
Chassis & Braking
The G26 4 Series Gran Coupe features a sophisticated chassis design with independent suspension at all four corners. The front suspension utilizes a McPherson strut design, while the rear employs a multi-link setup. This configuration provides a comfortable ride while maintaining good handling characteristics. The 430i xDrive Steptronic is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The electronic stability control system and ABS (Anti-lock Braking System) further enhance safety and control.
Market Reception & Comparison
The 430i xDrive Steptronic was generally well-received by automotive critics. It was praised for its refined driving experience, comfortable interior, and advanced technology. Compared to the higher-performance M440i, the 430i offered a more accessible price point and better fuel economy. However, some critics noted that the 430i lacked the outright performance and sporty character of its more powerful sibling. Fuel economy figures typically ranged from 29.8 to 33.1 US mpg, making it a relatively efficient option in the premium coupe segment.
Legacy
The B48 engine family, including the B48B20B found in the 430i, has proven to be a reliable and durable powertrain. While some early B48 engines experienced issues with oil leaks, these were largely addressed in later revisions. The 8-speed Steptronic automatic transmission is also known for its reliability. As a result, the 430i xDrive Steptronic is expected to hold its value reasonably well in the used car market. Its blend of performance, luxury, and technology makes it an attractive option for buyers seeking a premium four-door coupe.
