The Alpina D3 Sedan (G20) S 3.0, produced from November 2020 to 2022, represents a unique blend of performance and efficiency within the BMW 3 Series (G20) lineage. Positioned as a high-performance diesel variant, it occupies a niche above the standard 3 Series diesel models, offering significantly enhanced power and a more luxurious experience. This model is based on the BMW G20 platform, sharing its core architecture but distinguished by Alpina’s signature engineering and aesthetic enhancements. The D3 S 3.0 utilizes a mild hybrid system, integrating a small electric motor to assist the potent diesel engine, improving both performance and fuel economy. It was primarily marketed in Europe and select international markets, appealing to drivers seeking a refined, high-speed touring sedan with diesel efficiency.
Technical Specifications
| Brand | Alpina |
| Model | D3 |
| Generation | D3 Sedan (G20) |
| Type | S 3.0 (355 Hp) Mild Hybrid AWD Switch-Tronic |
| Start of production | November, 2020 |
| End of production | 2022 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 7.6 l/100 km (30.9 US mpg, 37.2 UK mpg, 13.2 km/l) |
| CO2 emissions (WLTP) | 198 g/km |
| Fuel consumption – urban (NEDC/WLTP) | 9.4 l/100 km (25 US mpg, 30.1 UK mpg, 10.6 km/l) |
| Fuel consumption – extra urban (NEDC/WLTP) | 5.2 l/100 km (45.2 US mpg, 54.3 UK mpg, 19.2 km/l) |
| Fuel consumption – combined (NEDC/WLTP) | 6.7 l/100 km (35.1 US mpg, 42.2 UK mpg, 14.9 km/l) |
| CO2 emissions (NEDC/WLTP) | 176 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 4.6 sec |
| Acceleration 0 – 62 mph | 4.6 sec |
| Acceleration 0 – 60 mph | 4.4 sec |
| Maximum speed | 273 km/h (169.63 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 5.5 kg/Hp, 182.1 Hp/tonne |
| Weight-to-torque ratio | 2.7 kg/Nm, 374.4 Nm/tonne |
| Electric motor power | 11 Hp |
| Power | 355 Hp @ 4000-4200 rpm |
| Power per litre | 118.6 Hp/l |
| Torque | 730 Nm @ 1750-2750 rpm (538.42 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B57D30 |
| 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 | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Kerb Weight | 1950 kg (4299.01 lbs.) |
| Max. weight | 2325 kg (5125.75 lbs.) |
| Max load | 375 kg (826.73 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 | 4719 mm (185.79 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 track | 1572 mm (61.89 in.) |
| Drivetrain Architecture | ICE and electric motor drive all four wheels |
| Drive wheel | 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, 345 mm |
| Front tires | 255/35 ZR19 |
| Rear tires | 265/35 ZR19 |
| Front wheel rims | 8.5J x 19 |
| Rear wheel rims | 9.5J x 19 |
Powertrain & Engine Architecture
At the heart of the D3 S 3.0 lies the BMW B57D30 engine, a 3.0-liter inline-six diesel engine. Alpina extensively modified this engine, increasing its output to 355 horsepower and a substantial 730 Nm (538 lb-ft) of torque. The engine employs a sophisticated bi-turbocharger system with variable turbine geometry, along with an intercooler, to maximize power and efficiency. The mild hybrid system, utilizing a 48V electrical architecture, adds a small electric motor that provides a power boost during acceleration and enables smoother start-stop operation. The engine features a diesel common rail direct injection system, delivering precise fuel metering for optimal combustion. The eight-speed automatic transmission, branded as ‘Switch-Tronic’ by Alpina, is specifically tuned for both performance and comfort, offering quick and smooth gear changes. This transmission is integral to the driving experience, providing seamless power delivery.
Driving Characteristics
The Alpina D3 S 3.0 delivers a remarkably refined and potent driving experience. The combination of the high-output diesel engine and the eight-speed automatic transmission results in brisk acceleration – 0 to 60 mph in approximately 4.4 seconds. The mild hybrid system contributes to a near-instantaneous throttle response, minimizing turbo lag. Compared to the standard BMW 330d, the D3 offers a noticeably more powerful and responsive feel. While the standard 330d prioritizes fuel economy, the D3 leans towards a more engaging and dynamic driving experience. The Switch-Tronic transmission is programmed for both automatic and manual shifting via steering wheel-mounted paddles, allowing the driver to tailor the driving experience to their preferences. The all-wheel-drive system provides excellent traction and stability in various conditions.
Equipment & Trim Levels
The Alpina D3 Sedan came generously equipped, building upon the already well-appointed BMW 3 Series. Standard features included Alpina-specific exterior styling cues (front and rear spoilers, unique wheels), a luxurious interior with premium leather upholstery, Alpina sports seats, and a bespoke steering wheel. Interior trim options included various wood veneers and aluminum accents. Available options included a panoramic sunroof, advanced driver-assistance systems (such as adaptive cruise control and lane-keeping assist), a premium sound system, and upgraded interior lighting. The D3 aimed for a balance between luxury and performance, offering a more exclusive and refined experience than the standard 3 Series models.
Chassis & Braking
The D3 S 3.0 features a sport-tuned suspension system, designed to enhance handling and stability without compromising ride comfort. The suspension utilizes stiffer springs and dampers compared to the standard 3 Series. The braking system consists of ventilated discs on all four wheels, with larger front discs (395mm) providing enhanced stopping power. The car is equipped with ABS (Anti-lock Braking System) and electronic stability control. The chassis is reinforced in key areas to handle the increased power and torque. The all-wheel-drive system distributes power between the front and rear axles as needed, optimizing traction and stability.
Market Reception & Comparison
The Alpina D3 S 3.0 was generally well-received by automotive critics, who praised its blend of performance, luxury, and efficiency. It was often lauded as a compelling alternative to traditional performance sedans. Compared to the BMW M340i, the D3 offered a different character – the M340i focused on outright performance with a gasoline engine, while the D3 prioritized refined power delivery and fuel economy with its diesel-hybrid powertrain. The D3’s fuel economy was significantly better than the M340i, making it a more practical choice for long-distance driving. However, some critics noted that the diesel engine lacked the aural excitement of a gasoline engine.
Legacy
The Alpina D3 S 3.0 (G20) represents a high point in the development of high-performance diesel sedans. The B57 engine, when properly maintained, is known for its durability and reliability. The mild hybrid system has also proven to be relatively trouble-free. On the used car market, these models hold their value well, appealing to enthusiasts seeking a unique and refined driving experience. The D3 S 3.0 is considered a desirable and well-engineered vehicle, offering a compelling combination of performance, luxury, and efficiency that continues to attract buyers today. Its legacy lies in demonstrating that diesel engines can deliver exhilarating performance without sacrificing fuel economy or refinement.
