The Alpina D10 Touring (E39), produced between 1999 and 2003, represents a unique blend of high-performance diesel power and the practicality of a station wagon. Based on the BMW E39 5-Series Touring, the D10 was Alpina’s answer to the growing demand for a refined, yet powerful, diesel-powered vehicle. It occupied a niche position, offering a more luxurious and potent alternative to standard BMW diesel models. The D10 Touring was never officially sold in the United States due to emissions regulations and market preferences, making it a relatively rare and sought-after vehicle among enthusiasts today.
Technical Specifications
| Brand | Alpina |
| Model | D10 |
| Generation | D10 Touring (E39) |
| Type (Engine) | 2.9 D Biturbo (245 Hp) Automatic |
| Start of production | 1999 |
| End of production | 2003 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 10.1 l/100 km (23.3 US mpg, 28 UK mpg, 9.9 km/l) |
| Fuel consumption (economy) – extra urban | 6.3 l/100 km (37.3 US mpg, 44.8 UK mpg, 15.9 km/l) |
| Fuel consumption (economy) – combined | 7.7 l/100 km (30.5 US mpg, 36.7 UK mpg, 13 km/l) |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.5 sec |
| Acceleration 0 – 62 mph | 7.5 sec |
| Acceleration 0 – 60 mph | 7.1 sec |
| Maximum speed | 251 km/h (155.96 mph) |
| Weight-to-power ratio | 7.1 kg/Hp, 141.2 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 288.2 Nm/tonne |
| Power | 245 Hp @ 3500 rpm |
| Power per litre | 83.7 Hp/l |
| Torque | 500 Nm @ 1800 rpm (368.78 lb.-ft. @ 1800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 2926 cm3 (178.56 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 88 mm (3.46 in.) |
| Compression ratio | 16:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger |
| Valvetrain | DOHC |
| Kerb Weight | 1735 kg (3825.02 lbs.) |
| Max. weight | 2310 kg (5092.68 lbs.) |
| Max load | 575 kg (1267.66 lbs.) |
| Trunk (boot) space – minimum | 410 l (14.48 cu. ft.) |
| Trunk (boot) space – maximum | 1525 l (53.85 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal, 15.4 UK gal) |
| Length | 4805 mm (189.17 in.) |
| Width | 1800 mm (70.87 in.) |
| Height | 1420 mm (55.91 in.) |
| Wheelbase | 2830 mm (111.42 in.) |
| Front track | 1512 mm (59.53 in.) |
| Rear (Back) track | 1514 mm (59.61 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 | 5 gears, automatic transmission |
| Front suspension | Wishbone |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 235/40 ZR18; 265/35 ZR18 |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
The heart of the D10 Touring is its 2.9-liter inline-six cylinder diesel engine, designated as the Alpina D10 engine. This engine isn’t a direct BMW design; Alpina extensively modified a BMW M57 diesel block. The key to its performance lies in the use of two variable geometry turbochargers (Biturbo), which significantly reduce turbo lag and provide a broad, flat torque curve. The engine utilizes a Bosch common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine code is often referenced as the D10, but it’s built upon the BMW M57 platform. The DOHC valvetrain with four valves per cylinder further enhances breathing and efficiency. The five-speed automatic transmission, sourced from ZF, was specifically calibrated by Alpina to handle the engine’s substantial torque output and provide smooth, responsive shifts. It’s a robust unit, known for its durability, but not as quick-shifting as some modern automatics.
Driving Characteristics
The D10 Touring offers a distinctly different driving experience compared to its gasoline-powered BMW 5-Series counterparts. The 500 Nm (368 lb-ft) of torque, available from just 1800 rpm, provides effortless acceleration and strong pulling power in any gear. While not as outright quick as the V8-powered 540i, the D10 feels remarkably swift and responsive, particularly in everyday driving situations. The automatic transmission, while smooth, is geared more towards relaxed cruising than aggressive performance. The gear ratios are spaced to maximize fuel efficiency and provide comfortable highway driving. Compared to the manual transmission options available on other 5-Series diesels, the D10 automatic prioritizes ease of use over driver engagement. The weight distribution is fairly balanced, contributing to stable handling, but the added weight of the diesel engine and automatic transmission is noticeable compared to lighter gasoline models.
Equipment & Trim Levels
The D10 Touring was positioned as a premium offering within the E39 5-Series range. Standard equipment included leather upholstery, wood trim, automatic climate control, power-adjustable seats, and a high-end audio system. Alpina-specific touches, such as unique badging, a bespoke steering wheel, and Alpina-branded gauges, further distinguished the D10 from standard BMW models. Optional extras included a sunroof, navigation system, and upgraded sound systems. The interior was designed to provide a luxurious and comfortable experience, reflecting Alpina’s focus on refinement and exclusivity.
Chassis & Braking
The D10 Touring utilizes the standard E39 5-Series chassis, but with Alpina-specific modifications to accommodate the diesel engine and automatic transmission. The suspension features stiffer springs and dampers compared to standard 5-Series models, providing improved handling and reduced body roll. The front suspension utilizes a wishbone design, while the rear employs a coil spring setup. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) is standard. Due to the increased weight of the diesel engine, the D10 often featured slightly thicker stabilizer bars than comparable gasoline models to maintain handling balance.
Market Reception & Comparison
The Alpina D10 Touring was generally well-received by automotive critics, who praised its blend of performance, refinement, and practicality. It was seen as a compelling alternative to traditional gasoline-powered station wagons, offering excellent fuel economy and strong torque delivery. Compared to the standard BMW 525d or 530d models, the D10 offered significantly more power and a more luxurious interior. However, it also came at a higher price point. Fuel economy was a strong point, achieving around 30.5 US mpg combined, which was competitive for a vehicle of its size and performance. Reliability was generally good, although the complex Biturbo system required careful maintenance.
Legacy
The Alpina D10 Touring remains a relatively rare and collectible vehicle today. Its unique combination of diesel power, station wagon practicality, and Alpina exclusivity has made it a favorite among enthusiasts. The 2.9-liter Biturbo diesel engine is known for its durability, but requires regular maintenance to ensure optimal performance. Finding parts can sometimes be challenging due to the vehicle’s limited production run. In the used car market, well-maintained D10 Tourings command a premium price, reflecting their rarity and desirability. The D10 represents a significant chapter in Alpina’s history, demonstrating the company’s ability to create high-performance, yet refined, diesel-powered vehicles.
