The Alpina D4 Coupe (F32, facelift 2017) 3.0d Switch-Tronic represents a unique blend of performance and luxury within the BMW 4 Series lineage. Produced from March 2017 to August 2018, this variant occupied a niche position, offering diesel-powered performance enhanced by Alpina’s signature tuning and refinement. It’s based on the F32 4 Series Coupe, benefitting from the 2017 facelift which included updated styling and technology. The D4 Coupe aimed to deliver a more efficient and refined driving experience compared to its gasoline-powered counterparts, while still providing substantial power and dynamic handling. This model is a testament to Alpina’s expertise in optimizing BMW platforms for a distinct driving character.
Technical Specifications
| Brand | Alpina |
| Model | D4 |
| Generation | D4 Coupe (F32, facelift 2017) |
| Type (Engine) | 3.0d (350 Hp) Switch-Tronic |
| Start of production | March, 2017 |
| End of production | August, 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 6 l/100 km (39.2 US mpg, 47.1 UK mpg, 16.7 km/l) |
| Fuel consumption (extra urban) | 4.9 l/100 km (48 US mpg, 57.6 UK mpg, 20.4 km/l) |
| Fuel consumption (combined) | 5.3 l/100 km (44.4 US mpg, 53.3 UK mpg, 18.9 km/l) |
| CO2 emissions | 139 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 | 278 km/h (172.74 mph) |
| Weight-to-power ratio | 4.5 kg/Hp, 220.8 Hp/tonne |
| Weight-to-torque ratio | 2.3 kg/Nm, 441.6 Nm/tonne |
| Power | 350 Hp @ 4000 rpm |
| Power per litre | 116.9 Hp/l |
| Torque | 700 Nm @ 1500-3000 rpm (516.29 lb.-ft. @ 1500-3000 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 | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Kerb Weight | 1585 kg (3494.33 lbs.) |
| Max. weight | 2105 kg (4640.73 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – maximum | 445 l (15.72 cu. ft.) |
| Fuel tank capacity | 57 l (15.06 US gal | 12.54 UK gal) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4640 mm (182.68 in.) |
| Width | 1825 mm (71.85 in.) |
| Height | 1382 mm (54.41 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1552 mm (61.1 in.) |
| Rear (Back) track | 1576 mm (62.05 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 8 gears, automatic transmission Switch Tronic |
| 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: 245/35 ZR19 Rear wheel tires: 265/35 ZR19 |
| Wheel rims size | Front wheel rims: 8J x 19 Rear wheel rims: 9J x 19 |
Powertrain & Engine Architecture
At the heart of the Alpina D4 Coupe lies the BMW B57D30O1 3.0-liter inline-six diesel engine. This engine is not a standard BMW unit; Alpina extensively modifies it to enhance performance and durability. Key upgrades include a revised turbocharger system featuring twin turbochargers with variable turbine geometry (VTG), a larger intercooler, and a bespoke engine management system. The engine utilizes a Bosch common rail direct injection system, delivering fuel at pressures up to 2,500 bar for optimized combustion. The valvetrain employs four valves per cylinder, contributing to efficient gas exchange. The “Switch-Tronic” 8-speed automatic transmission is another crucial component. This transmission, based on the ZF 8HP series, is specifically calibrated by Alpina for quicker shifts and more responsive performance. It offers a manual shift mode for greater driver control.
Driving Characteristics
The D4 Coupe’s 350 horsepower and 700 Nm (516 lb-ft) of torque provide strong acceleration. The 0-60 mph sprint takes approximately 4.4 seconds, and it boasts a top speed of 172.74 mph. The Switch-Tronic transmission is well-matched to the engine’s characteristics, providing smooth and rapid gear changes. Compared to the standard 4 Series diesel models, the D4 offers a noticeably more urgent response and a broader powerband. While not as overtly sporty as the gasoline-powered M4, the D4 delivers a refined and engaging driving experience. The gear ratios are optimized for both acceleration and highway cruising, making it a comfortable grand tourer. The torque delivery is particularly impressive, providing effortless overtaking capability.
Equipment & Trim Levels
The Alpina D4 Coupe came generously equipped as standard. Interior features included premium leather upholstery, Alpina-specific interior trim (often featuring wood or carbon fiber), sport seats, and a high-end audio system. Standard exterior features included Alpina aerodynamic enhancements, unique alloy wheels (typically 19-inch), and Alpina badging. Optional extras included a panoramic sunroof, upgraded leather options, and various driver assistance systems. The interior dashboard configuration was largely similar to the standard F32 4 Series, but with Alpina-branded instrumentation and unique trim elements.
Chassis & Braking
The D4 Coupe’s chassis builds upon the standard 4 Series platform, but with Alpina-specific modifications. These include stiffer springs and dampers, recalibrated electronic stability control, and a reinforced rear axle. The braking system features ventilated discs all around, providing ample stopping power. The suspension setup is tuned to balance comfort and handling, offering a more controlled and engaging driving experience than the standard 4 Series. The steering is precise and well-weighted, providing good feedback to the driver.
Market Reception & Comparison
The Alpina D4 Coupe was generally well-received by automotive critics. It was praised for its blend of performance, luxury, and efficiency. Compared to the standard 4 Series diesel models, the D4 offered a significant performance upgrade and a more exclusive driving experience. Against its gasoline-powered siblings, such as the 430i and 440i, the D4 provided comparable acceleration with superior fuel economy. However, some critics noted that the diesel engine lacked the aural excitement of the gasoline engines. Reliability has proven to be generally good, with the Alpina-modified engine and transmission proving durable.
Legacy
The Alpina D4 Coupe (F32) represents a compelling alternative for those seeking a high-performance coupe with diesel efficiency. On the used car market, these models hold their value well due to their exclusivity and the Alpina brand’s reputation for quality and engineering. The B57 engine, in its Alpina-tuned form, is known for its longevity and relatively low maintenance costs. While diesel vehicles have faced increased scrutiny in recent years, the D4 Coupe remains a desirable option for enthusiasts who appreciate its unique combination of performance, refinement, and fuel economy.
