The Alpina B5 Touring (G31, facelift 2020) represents the pinnacle of high-performance, luxury station wagons. Introduced in October 2020, this variant builds upon the BMW 5 Series Touring (G31) platform, meticulously refined by Alpina to deliver an exceptional blend of power, handling, and practicality. Positioned as the flagship of the B5 Touring range, the 4.4 V8 (621 Hp) AWD Switch-Tronic model offers a significant performance upgrade over other engine options, targeting discerning drivers who demand both exhilarating performance and the versatility of a wagon body style. It continues Alpina’s tradition of hand-built, low-volume automobiles, offering a unique alternative to mainstream performance brands.
Technical Specifications
| Brand | Alpina |
| Model | B5 |
| Generation | B5 Touring (G31, facelift 2020) |
| Type (Engine) | 4.4 V8 (621 Hp) AWD Switch-Tronic |
| Start of production | October, 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 12 l/100 km (19.6 US mpg, 23.5 UK mpg, 8.3 km/l) |
| CO2 emissions (WLTP) | 272 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) | 8.5 l/100 km (27.7 US mpg, 33.2 UK mpg, 11.8 km/l) |
| Fuel consumption (combined) | 11.2 l/100 km (21 US mpg, 25.2 UK mpg, 8.9 km/l) |
| CO2 emissions (NEDC) | 256 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 3.6 sec |
| Acceleration 0 – 62 mph | 3.6 sec |
| Acceleration 0 – 60 mph | 3.4 sec |
| Maximum speed | 322 km/h (200.08 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 3.5 kg/Hp, 288.2 Hp/tonne |
| Weight-to-torque ratio | 2.7 kg/Nm, 371.2 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 | 2155 kg (4750.96 lbs.) |
| Max. weight | 2620 kg (5776.11 lbs.) |
| Max load | 465 kg (1025.15 lbs.) |
| Trunk (boot) space – minimum | 560 l (19.78 cu. ft.) |
| Trunk (boot) space – maximum | 1700 l (60.03 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) | 285/30 ZR20 |
| Wheel rims (front) | 8.5J x 20 |
| Wheel rims (rear) | 10J x 20 |
Powertrain & Engine Architecture
At the heart of the B5 Touring lies Alpina’s version of the BMW N63M50 4.4-liter twin-turbocharged V8 engine. While based on the BMW powerplant, Alpina extensively modifies the engine with bespoke pistons, connecting rods, and turbochargers. These upgrades, along with a revised cooling system and exhaust, contribute to the engine’s impressive output of 621 horsepower and 590 lb-ft of torque. The engine utilizes direct fuel injection and variable valve timing (Valvetronic) to optimize efficiency and responsiveness. The ‘Switch-Tronic’ 8-speed automatic transmission is also heavily modified by Alpina, featuring quicker shift times and a more aggressive shift program. This transmission is designed to handle the engine’s substantial torque and provide seamless gear changes during both spirited driving and relaxed cruising.
Driving Characteristics
The B5 Touring delivers a remarkably refined yet potent driving experience. The 621 hp and 590 lb-ft of torque, combined with the all-wheel-drive system, result in blistering acceleration – 0 to 60 mph in just 3.4 seconds. The Switch-Tronic transmission provides smooth and precise shifts, adapting to the driver’s input. While the power delivery is immediate and forceful, it’s remarkably controllable, making the B5 Touring surprisingly easy to drive quickly. Compared to the standard BMW 5 Series Touring, the Alpina offers a more compliant ride thanks to its specifically tuned suspension. The steering is precise and well-weighted, providing excellent feedback. The all-wheel-drive system ensures exceptional traction in all weather conditions.
Equipment & Trim Levels
The B5 Touring is comprehensively equipped as standard, reflecting its premium positioning. Standard features include Alpina-specific exterior styling cues (front and rear spoilers, unique wheels), a luxurious interior with Lavalina leather upholstery, Alpina sports seats, a panoramic sunroof, and a premium sound system. Interior trim options include various wood veneers and piano black finishes. Optional extras include Alpina’s ceramic brake system, active roll stabilization, and a rear-seat entertainment system. The interior features Alpina-branded gauges and switchgear, adding to the car’s exclusive feel.
Chassis & Braking
The B5 Touring features a modified chassis compared to the standard 5 Series Touring. Alpina utilizes stiffer springs and dampers, along with reinforced suspension components, to improve handling and reduce body roll. The car rides on 20-inch Alpina wheels fitted with high-performance tires. The braking system consists of ventilated discs all around, with larger rotors and multi-piston calipers compared to the standard 5 Series. The B5 Touring also benefits from Alpina’s electronic stability control system, which is tuned for optimal performance and safety.
Market Reception & Comparison
The Alpina B5 Touring (G31) was generally well-received by automotive critics, praised for its exceptional performance, luxurious interior, and practicality. It was often compared favorably to other high-performance wagons, such as the Audi RS6 Avant and the Mercedes-AMG E63 S Wagon. While the Alpina offered a similar level of performance to its rivals, it distinguished itself with its more refined ride quality and understated styling. Fuel economy, while not a primary concern for buyers in this segment, was respectable for a vehicle of this performance – around 19.6 US mpg combined. Reliability was generally considered good, benefiting from Alpina’s meticulous build quality and BMW’s underlying engineering.
Legacy
The Alpina B5 Touring (G31, facelift 2020) represents a high point in the evolution of the high-performance wagon. Its combination of power, luxury, and practicality has made it a sought-after vehicle in the used car market. The N63M50 engine, while complex, has proven to be relatively reliable when properly maintained. The Alpina’s unique character and limited production numbers ensure its continued appeal to enthusiasts and collectors. As a hand-built, low-volume automobile, the B5 Touring offers a distinctive alternative to mainstream performance cars, cementing Alpina’s reputation as a builder of exceptional automobiles.
