The Alpina B3 Sedan (G20, facelift 2022) 3.0, producing 495 horsepower, represents a high-performance iteration of the BMW 3 Series. Introduced in 2022 and continuing production until June 2024, this model occupies a unique niche between the standard BMW M340i and the full-fledged BMW M3. Built upon the G20 3 Series platform, the B3 aims to deliver a more refined and luxurious grand touring experience while maintaining exceptional performance capabilities. This variant specifically caters to drivers seeking a powerful, all-wheel-drive sedan with a focus on both spirited driving and everyday usability.
Technical Specifications
| Brand | Alpina |
| Model | B3 |
| Generation | B3 Sedan (G20, facelift 2022) |
| Type | 3.0 (495 Hp) AWD SWITCH-TRONIC |
| Start of production | 2022 |
| End of production | June, 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 10.1 l/100 km |
| Combined fuel consumption (US mpg) | 23.3 US mpg |
| Combined fuel consumption (UK mpg) | 28 UK mpg |
| Combined fuel consumption (km/l) | 9.9 km/l |
| CO2 emissions (WLTP) | 229 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 | 305 km/h (189.52 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 3.8 kg/Hp, 264 Hp/tonne |
| Weight-to-torque ratio | 2.6 kg/Nm, 389.3 Nm/tonne |
| Power | 495 Hp @ 5000-7000 rpm |
| Power per litre | 165.4 Hp/l |
| Torque | 730 Nm @ 2500-4500 rpm (538.42 lb.-ft. @ 2500-4500 rpm) |
| Engine layout | Front, Longitudinal |
| 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 |
| Kerb Weight | 1875 kg (4133.67 lbs.) |
| Max. weight | 2340 kg (5158.82 lbs.) |
| Max load | 465 kg (1025.15 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4723 mm (185.94 in.) |
| Width | 1827 mm (71.93 in.) |
| Width including mirrors | 2068 mm (81.42 in.) |
| Height | 1440 mm (56.69 in.) |
| Wheelbase | 2851 mm (112.24 in.) |
| Front track | 1577 mm (62.09 in.) |
| Rear (Back) track | 1572 mm (61.89 in.) |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives all four wheels. |
| Number of gears and type of gearbox | 8 gears, automatic transmission Switch-Tronic |
| 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 | Front wheel tires: 255/35 R19 Rear wheel tires: 265/35 R19 |
| Wheel rims size | Front wheel rims: 8.5J x 19 Rear wheel rims: 9.5J x 19 |
Powertrain & Engine Architecture
At the heart of the B3 Sedan lies a 3.0-liter inline-six cylinder engine, designated as the B58 engine family by BMW, but extensively modified by Alpina. This engine utilizes a twin-turbocharged configuration with a single, large turbocharger and an auxiliary electric turbocharger, enhancing both low-end responsiveness and high-end power delivery. Direct fuel injection and a sophisticated double-VANOS variable valve timing system contribute to optimal combustion efficiency and performance. The engine produces 495 horsepower at 5000-7000 rpm and a substantial 730 Nm (538.42 lb.-ft.) of torque between 2500 and 4500 rpm. This power is channeled through an 8-speed automatic transmission, branded as SWITCH-TRONIC by Alpina, which offers both fully automatic operation and manual gear selection via steering wheel-mounted paddles. The transmission is specifically tuned for smooth and rapid shifts, complementing the engine’s characteristics.
Driving Characteristics
The B3 Sedan delivers a compelling driving experience characterized by its blend of power, refinement, and all-wheel-drive traction. The all-wheel-drive system, utilizing a sophisticated xDrive setup, provides excellent grip in various conditions, enabling brisk acceleration and confident handling. The 0-60 mph sprint is achieved in just 3.4 seconds, and the car boasts a top speed of 305 km/h (189.52 mph). Compared to the standard BMW 3 Series or even the M340i, the B3 offers a more relaxed and composed ride quality, thanks to Alpina’s suspension tuning. While not as overtly track-focused as the M3, the B3 provides ample performance for spirited driving on public roads. The SWITCH-TRONIC transmission offers quick and precise shifts, and the engine’s broad torque curve ensures strong acceleration in any gear.
Equipment & Trim Levels
The Alpina B3 Sedan comes generously equipped with a range of luxury and performance features. Standard equipment includes leather upholstery, heated and ventilated front seats, a premium sound system, and a comprehensive suite of driver-assistance systems. Alpina-specific touches, such as unique interior trim pieces, a bespoke steering wheel, and exclusive exterior styling cues, distinguish the B3 from its BMW counterparts. Optional extras include a panoramic sunroof, adaptive cruise control, and a head-up display. The interior design emphasizes comfort and craftsmanship, creating a luxurious and inviting cabin environment.
Chassis & Braking
The B3 Sedan features a meticulously tuned chassis designed to balance performance and comfort. The suspension utilizes McPherson struts at the front and a multi-link setup at the rear, with Alpina-specific dampers and springs. This configuration provides a comfortable ride while maintaining excellent body control. The braking system consists of ventilated discs at all four corners, providing ample stopping power. The ABS (Anti-lock braking system) ensures safe and controlled braking in emergency situations. The steering is a rack-and-pinion system with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The Alpina B3 Sedan was generally well-received by automotive critics, who praised its blend of performance, luxury, and refinement. It was often positioned as a compelling alternative to the BMW M340i and the Porsche Panamera, offering a unique combination of attributes. Fuel economy, while not a primary focus, is respectable for a high-performance sedan, with a combined fuel consumption of 10.1 l/100 km (23.3 US mpg). Reliability is generally considered to be good, benefiting from Alpina’s meticulous engineering and quality control. Compared to the more hardcore BMW M3, the B3 prioritizes comfort and usability, making it a more practical choice for everyday driving.
Legacy
The Alpina B3 Sedan (G20, facelift 2022) 3.0 (495 Hp) AWD SWITCH-TRONIC represents a significant achievement in high-performance sedan engineering. Its sophisticated powertrain, refined chassis, and luxurious interior have established it as a desirable and collectible vehicle. On the used car market, these models command a premium price due to their exclusivity and performance capabilities. The B58 engine, in particular, is known for its robustness and tunability, making it a popular choice among enthusiasts. As a limited-production vehicle, the B3 Sedan is likely to appreciate in value over time, solidifying its place as a modern classic.
