The Alpina B4 Gran Coupe (G26, facelift 2024) GT 3.0, powered by a 529 horsepower engine, represents the pinnacle of performance within the Alpina B4 Gran Coupe range. Introduced in June 2024, this variant builds upon the already potent BMW 4 Series Gran Coupe, offering a unique blend of luxury, performance, and exclusivity. It occupies the top-tier position in the B4 Gran Coupe lineup, exceeding the capabilities of the standard 4 Series and even BMW’s own M Performance models. The “facelift” designation refers to updates applied to the G26 generation, enhancing both aesthetics and technology.
Technical Specifications
| Brand | Alpina |
| Model | B4 |
| Generation | B4 Gran Coupe (G26, facelift 2024) |
| Type | GT 3.0 (529 Hp) AWD SWITCH-TRONIC |
| Start of production | June, 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 4 |
| Fuel consumption at Low speed (WLTP) | 17.6 l/100 km (13.4 US mpg, 16.1 UK mpg, 5.7 km/l) |
| Fuel consumption at Medium speed (WLTP) | 10.5 l/100 km (22.4 US mpg, 26.9 UK mpg, 9.5 km/l) |
| Fuel consumption at high speed (WLTP) | 8.8 l/100 km (26.7 US mpg, 32.1 UK mpg, 11.4 km/l) |
| Fuel consumption at very high speed (WLTP) | 9.1 l/100 km (25.8 US mpg, 31 UK mpg, 11 km/l) |
| Combined fuel consumption (WLTP) | 10.5-10.6 l/100 km (22.4 – 22.2 US mpg, 26.9 – 26.6 UK mpg, 9.5 – 9.4 km/l) |
| CO2 emissions (WLTP) | 239-241 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 3.5 sec |
| Acceleration 0 – 62 mph | 3.5 sec |
| Acceleration 0 – 60 mph | 3.3 sec |
| Acceleration 0 – 200 km/h | 11.9 sec |
| Maximum speed | 305 km/h (189.52 mph) |
| Emission standard | Euro 6e |
| Weight-to-power ratio | 3.6 kg/Hp, 279.9 Hp/tonne |
| Weight-to-torque ratio | 2.6 kg/Nm, 386.2 Nm/tonne |
| Power | 529 Hp @ 6250-6500 rpm |
| Power per litre | 176.7 Hp/l |
| Torque | 730 Nm @ 2500-4500 rpm (538.42 lb.-ft. @ 2500-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | S58B30 |
| 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 | 9.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine systems | Start & Stop System, Particulate filter |
| Kerb Weight | 1890 kg (4166.74 lbs.) |
| Max. weight | 2400 kg (5291.09 lbs.) |
| Max load | 510 kg (1124.36 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 | 4800 mm (188.98 in.) |
| Width | 1850 mm (72.83 in.) |
| Width including mirrors | 2073 mm (81.61 in.) |
| Height | 1440 mm (56.69 in.) |
| Wheelbase | 2856 mm (112.44 in.) |
| Front track | 1593 mm (62.72 in.) |
| Rear (Back) track | 1588 mm (62.52 in.) |
| Minimum turning circle | 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 SWITCH-TRONIC |
| 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 wheel tires: 255/35 ZR20, Rear wheel tires: 285/30 ZR20 |
| Wheel rims size | Front wheel rims: 8.5J x 20, Rear wheel rims: 10J x 20 |
INTRODUCTION
The Alpina B4 Gran Coupe (G26, facelift 2024) GT 3.0 is a high-performance four-door coupe based on the BMW 4 Series Gran Coupe. Alpina, a renowned German automotive engineering company, independently develops and manufactures these vehicles, enhancing them with significant performance and luxury upgrades. The G26 generation, introduced in 2021, received a facelift in 2024, bringing revised styling and updated technology. This GT 3.0 variant, with its 529 horsepower output, sits at the top of the B4 Gran Coupe range, offering a compelling alternative to traditional high-performance sedans and coupes. It’s designed for drivers who desire a blend of everyday usability, luxurious appointments, and exhilarating performance.
Powertrain & Engine Architecture
At the heart of the B4 Gran Coupe GT 3.0 lies the Alpina-tuned S58B30 3.0-liter inline-six engine. This engine is based on the BMW S58 engine, but extensively modified by Alpina to deliver increased power and torque. Key upgrades include specifically designed turbochargers, a revised cooling system, and a unique exhaust system. The engine utilizes direct fuel injection and features a bi-turbo setup with an intercooler to maximize efficiency and power output. The engine produces 529 horsepower at 6250-6500 rpm and a substantial 730 Nm (538.42 lb.-ft.) of torque between 2500 and 4500 rpm.
Power is transmitted to all four wheels via an 8-speed automatic transmission, branded as SWITCH-TRONIC by Alpina. This transmission is a modified version of the ZF 8HP transmission, known for its smooth and rapid shifts. Alpina’s calibration of the transmission prioritizes both performance and comfort, offering a range of driving modes to suit different conditions and preferences. The all-wheel-drive system is also Alpina-tuned, providing optimized traction and stability.
Driving Characteristics
The B4 Gran Coupe GT 3.0 delivers a thrilling driving experience. The combination of the powerful engine and all-wheel-drive system results in a 0-60 mph acceleration time of just 3.3 seconds and a top speed of 305 km/h (189.52 mph). The SWITCH-TRONIC transmission provides quick and precise gear changes, enhancing the car’s responsiveness. While the car is undeniably fast, Alpina has focused on maintaining a comfortable and refined ride quality. The suspension is tuned to provide a good balance between handling and comfort, making it suitable for both spirited driving and long-distance cruising. Compared to the standard 4 Series or even the M4, the B4 Gran Coupe GT 3.0 offers a more relaxed and refined driving experience, with a greater emphasis on usability and comfort.
Equipment & Trim Levels
The B4 Gran Coupe GT 3.0 comes standard with a comprehensive list of features, reflecting its premium positioning. Interior appointments include high-quality leather upholstery, Alpina-specific interior trim, and sport seats. Standard technology features include a large infotainment display, a digital instrument cluster, and a premium sound system. Optional extras include a panoramic sunroof, upgraded leather options, and advanced driver-assistance systems. Alpina also offers a bespoke customization program, allowing customers to personalize their vehicles with unique colors, materials, and features.
Chassis & Braking
The B4 Gran Coupe GT 3.0 features a chassis that has been optimized for performance and handling. The suspension utilizes spring struts at the front and an independent multi-link setup at the rear, both incorporating stabilizer bars to reduce body roll. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Alpina has also tuned the steering system for improved responsiveness and feel. The car rides on 20-inch alloy wheels, fitted with high-performance tires.
Market Reception & Comparison
The Alpina B4 Gran Coupe GT 3.0 has been well-received by automotive critics, who praise its blend of performance, luxury, and exclusivity. It is often seen as a compelling alternative to the BMW M4 Gran Coupe, offering a more refined and comfortable driving experience. Fuel economy, while not a primary focus, is respectable for a car of this performance level, with combined WLTP figures ranging from 10.5 to 10.6 l/100 km. Reliability is generally considered to be good, benefiting from Alpina’s meticulous engineering and quality control.
Legacy
The Alpina B4 Gran Coupe GT 3.0 represents a continuation of Alpina’s tradition of creating unique and high-performance automobiles. The S58 engine, with its robust design and potential for tuning, is expected to be a reliable powertrain in the long term. As a relatively new model, its long-term reliability is still being established, but Alpina’s reputation for build quality and engineering suggests that it will hold its value well in the used car market. The B4 Gran Coupe GT 3.0 is likely to become a sought-after vehicle among enthusiasts who appreciate its blend of performance, luxury, and exclusivity.
