The Alpina B5 Sedan (G30, facelifted in 2020) represents the pinnacle of high-performance luxury sedans based on the BMW 5 Series platform. Introduced in October 2020, this variant is powered by a potent 4.4-liter V8 engine producing 621 horsepower, paired with Alpina’s Switch-Tronic eight-speed automatic transmission and a sophisticated all-wheel-drive system. Positioned as the flagship model in the B5 lineup, it caters to drivers seeking uncompromising performance, refined comfort, and exclusivity. The G30 generation B5 builds upon Alpina’s decades-long tradition of enhancing BMW vehicles, offering a unique blend of German engineering and bespoke customization.
Technical Specifications
| Brand | Alpina |
| Model | B5 |
| Generation | B5 Sedan (G30, facelift 2020) |
| Type (Engine) | 4.4 V8 (621 Hp) AWD Switch-Tronic |
| Start of production | October, 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 11.6 l/100 km (20.3 US mpg, 24.4 UK mpg, 8.6 km/l) |
| CO2 emissions (WLTP) | 263 g/km |
| Fuel consumption (urban) | 15.9 l/100 km (14.8 US mpg, 17.8 UK mpg, 6.3 km/l) |
| Fuel consumption (extra urban) | 8.3 l/100 km (28.3 US mpg, 34 UK mpg, 12 km/l) |
| Fuel consumption (combined) | 11.1 l/100 km (21.2 US mpg, 25.4 UK mpg, 9 km/l) |
| CO2 emissions (NEDC) | 253 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 3.4 sec |
| Acceleration 0 – 62 mph | 3.4 sec |
| Acceleration 0 – 60 mph | 3.2 sec |
| Maximum speed | 330 km/h (205.05 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 3.3 kg/Hp, 302.2 Hp/tonne |
| Weight-to-torque ratio | 2.6 kg/Nm, 389.3 Nm/tonne |
| Power | 621 Hp @ 5500-6500 rpm |
| Power per litre | 141.3 Hp/l |
| Torque | 800 Nm @ 2000-5000 rpm (590.05 lb.-ft. @ 2000-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N63M50 |
| Engine displacement | 4395 cm3 (268.2 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 88.3 mm (3.48 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Engine systems | Start & Stop System, Particulate filter |
| Kerb Weight | 2055 kg (4530.5 lbs.) |
| Max. weight | 2520 kg (5555.65 lbs.) |
| Max load | 465 kg (1025.15 lbs.) |
| Trunk (boot) space – minimum | 530 l (18.72 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal, 14.96 UK gal) |
| Permitted trailer load (braked) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Length | 4978 mm (195.98 in.) |
| Width | 1868 mm (73.54 in.) |
| Width (with mirrors) | 2126 mm (83.7 in.) |
| Height | 1466 mm (57.72 in.) |
| Wheelbase | 2975 mm (117.13 in.) |
| Front track | 1611 mm (63.43 in.) |
| Rear track | 1596 mm (62.83 in.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears | 8 |
| Gearbox type | Automatic transmission Switch-Tronic |
| Front brakes | Ventilated discs, 395 mm |
| Rear brakes | Ventilated discs, 398 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires (Front) | 255/35 ZR20 |
| Tires (Rear) | 295/30 ZR20 |
| Wheel rims (Front) | 8.5J x 20 |
| Wheel rims (Rear) | 10J x 20 |
INTRODUCTION
The Alpina B5 Sedan (G30, facelift 2020) is a high-performance variant of the BMW 5 Series, meticulously engineered by the independent German automaker Alpina. Building on the already capable 5 Series, the B5 elevates performance and luxury to a new level. The facelifted version, introduced in 2020, brought updated styling cues and further refinements to the powertrain and technology. The B5 occupies a unique niche, bridging the gap between the standard 5 Series and the more track-focused BMW M5, offering a more comfortable and refined driving experience without sacrificing significant performance. It’s a grand tourer designed for long-distance high-speed travel.
Powertrain & Engine Architecture
At the heart of the B5 is Alpina’s version of the BMW N63M50 4.4-liter twin-turbocharged V8 engine. While based on the BMW unit, Alpina extensively modifies the engine with bespoke pistons, connecting rods, and turbochargers. These changes, along with a revised cooling system and exhaust, result in an output of 621 horsepower and 800 Nm (590 lb-ft) of torque. The engine utilizes direct fuel injection and features a sophisticated engine management system calibrated for optimal performance and efficiency. The Switch-Tronic eight-speed automatic transmission is also heavily modified by Alpina, featuring quicker shift times and a more responsive feel. It offers a selectable driving mode system, allowing the driver to tailor the transmission’s behavior to their preferences. The all-wheel-drive system is BMW’s xDrive, but with Alpina-specific tuning for enhanced stability and traction.
Driving Characteristics
The B5 Sedan delivers a remarkably smooth and powerful driving experience. The 621 hp and 800 Nm of torque are readily available, providing effortless acceleration in any gear. The 0-60 mph sprint is dispatched in just 3.2 seconds, and the car boasts a top speed of 330 km/h (205 mph). The Switch-Tronic transmission shifts quickly and seamlessly, contributing to the car’s impressive performance. Compared to the standard 5 Series or even the M5, the B5 prioritizes comfort and refinement. The suspension is tuned to provide a more compliant ride, and the exhaust note is more subdued, making it ideal for long-distance cruising. While not as overtly aggressive as the M5, the B5 still offers exceptional handling and grip, thanks to its all-wheel-drive system and Alpina-tuned chassis.
Equipment & Trim Levels
The Alpina B5 Sedan comes exceptionally well-equipped as standard. Interior appointments include premium leather upholstery, Alpina-specific interior trim (often featuring wood or carbon fiber), and comfortable, supportive seats. Standard features include a comprehensive infotainment system with a large touchscreen display, a premium sound system, and a suite of advanced driver-assistance systems. Optional extras include a panoramic sunroof, upgraded leather options, and bespoke interior customization options. Alpina offers a high degree of personalization, allowing customers to tailor the car to their exact specifications.
Chassis & Braking
The B5 utilizes the standard BMW 5 Series chassis, but with significant modifications by Alpina. These include stiffer springs, adaptive dampers, and reinforced suspension components. The brakes are upgraded with larger discs and calipers for improved stopping power. The front brakes feature 395mm ventilated discs, while the rear brakes utilize 398mm ventilated discs. The car is equipped with ABS, stability control, and traction control systems to enhance safety and handling. The steering is precise and well-weighted, providing excellent feedback to the driver.
Market Reception & Comparison
The Alpina B5 Sedan has been widely praised by automotive critics for its blend of performance, luxury, and refinement. It’s often seen as a compelling alternative to the BMW M5, offering a more comfortable and understated driving experience. Compared to the M5, the B5 typically achieves slightly lower fuel economy due to its higher weight and more relaxed driving focus. However, the B5’s reliability is generally considered to be on par with or better than the M5, thanks to Alpina’s meticulous engineering and attention to detail. The B5’s price point positions it above the standard 5 Series but below the M5, making it an attractive option for buyers seeking a unique and exclusive high-performance sedan.
Legacy
The Alpina B5 Sedan (G30) continues to hold its value well in the used car market, reflecting its exclusivity and reputation for quality. The N63M50 engine, while complex, has proven to be relatively reliable when properly maintained. Regular servicing and adherence to Alpina’s recommended maintenance schedule are crucial for ensuring the long-term health of the powertrain. The B5’s combination of performance, luxury, and understated elegance has cemented its place as a desirable and collectible modern classic.
