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An astonishing new generation of ultra-high-performance diesel saloons and estates has been launched by ALPINA, one of the world’s most highly-regarded manufacturers of bespoke luxury cars. With 350 hp and a remarkable 700 Nm of torque, the new D3 Bi-Turbo will catapult its occupants from zero to 62 mph in just 4.6 seconds and on to 173 mph, yet has combined cycle fuel economy of 53.2 mpg and CO₂ emissions of just 139 g/km.

“What makes these figures even more remarkable is that the D3 Bi-Turbo is also a luxury car that delivers its world-beating performance alongside uncompromising comfort and refinement,” comments Matthew Stripling, Sales Manager at ALPINA GB. “The new six cylinder D3 has a wonderful bespoke feel that touches all the senses to make every journey a pleasure, whether commuting to work or powering through the mountains.”

Based on BMW’s latest generation 3-Series, the D3 Bi-Turbo is the result of a two year development programme during which every aspect of the vehicle was analysed and refined to increase performance, comfort and style. Using design and validation processes identical to those implemented by BMW, ALPINA’s team of 50 development engineers worked with specialist suppliers to enhance the engine, gearbox, cooling system, body structure, wheels, tyres, aerodynamics, suspension and interior.

Bespoke Luxury
The BMW ALPINA D3 Bi-Turbo is available in the UK as a Saloon for £46,950 or as a Touring (estate) for £49,950, with a long list of standard equipment that includes an eight-speed automatic gearbox, Adaptive M Sport Suspension, leather upholstery, electrically adjustable heated sports seats, climate control and Bi-Xenon headlights. Inside, there are luxury carpet overmats and subtle ALPINA logos on the seat backs and door sills. The instruments are in ALPINA Blue and the steering wheel is covered in finest-quality, hand-stitched Lavalina leather.

Outside, the new D3 Bi-Turbo receives subtle aerodynamic enhancements developed in BMW’s wind tunnel, a four outlet exhaust with an ‘intelligent’ acoustic valve, and 19” ALPINA alloy wheels in the company’s famous Classic design. Every car is finished with a model plaque displayed on the centre console, showing the car’s unique build number.

In addition to being available with all BMW options including those from BMW Individual, the D3 Bi-Turbo can receive almost limitless personalisation from ALPINA’s craftsmen. Alongside the famous ALPINA Blue and ALPINA Green signature paintwork, choices include hand-stitched full leather interiors of superb quality and a wide range of hand-finished woods for the dashboard and doors.

Tax-efficient Performance for Business Users
The D3 Bi-Turbo Saloon has a P11D value of £46,950 and, because of its low CO₂ emissions, incurs a 2012/13 BIK tax rate of just 22%. This makes the annual taxable benefit £10,340, meaning a 40% tax payer would currently pay £344.66 per month – little more than half the tax payable for running a comparable petrol vehicle.

“The D3 will be attractive to business users who have the resources to purchase a high-performance luxury car but have been put-off by the high taxation,” says Stripling. “ALPINA has traditionally been the choice of informed professionals who enjoy fine technology and attention to detail. With such a competitive package, the D3 Bi-Turbo is sure to prove successful in this discerning market.”

ALPINA has worked closely with BMW since 1961, with shared warranty coverage since 1964. The company was registered as an automobile manufacturer to ISO standards in 1983.

Technical Notes

Bespoke ALPINA Technology

ALPINA CEO Andreas Bovensiepen says the remarkable combination of comfort, performance and durability achieved with every vehicle is possible because although all BMW ALPINAs are available with an almost infinite variety of bespoke luxuries, his company manufactures only one mechanical specification for each model.

“As well as enhancing the performance of all major vehicle systems, our engineers are able to focus on ensuring that they work perfectly together, without the compromises needed for wide model and option variations,” he explains. “For ride comfort, for example, there is one combination of seat cushion, tyres, wheels, dampers, bushes and springs, so they can be designed to work as a well-coordinated team. We build only 1,200 cars a year, so we can do things that would not be possible in volume production.”

Powertrain

The BMW ALPINA D3 Bi-Turbo’s lightweight powertrain is based on BMW’s aluminium three litre straight six running ALPINA’s own engine control unit with bespoke software. Exceptionally clean, it already complies with the tough Euro 6 emissions standards to be introduced in September 2014.

ALPINA has specified two small, variable geometry turbochargers (rather than one larger unit) because their lower inertia allows them to respond very quickly. These are fed from larger intake ducts with optimised radii, allowing the engine to breathe more freely by reducing induction air pressure losses by 30 percent compared with the standard system. The result of complex fluid dynamics modelling, the bespoke induction system supports increased engine output as well as improving throttle response. A 20 percent larger intercooler with flow-optimised aluminium ducting increases the density of the fuel / air mixture to further enhance engine performance.

Although optimised for fast road driving rather than track use, BMW ALPINA cars are engineered to provide consistent performance and high reliability when driven hard for long periods. Central to this ability is the enhanced powertrain cooling system. An additional radiator in the engine cooling circuit is mounted behind the bespoke front spoiler, which also directs air to the new, high-flow oil cooler. Control is provided by a dedicated thermal systems control unit that uses information from the vehicle’s databus to optimise powertrain temperatures and to reduce parasitic loading on the engine by momentarily switching off the fan when maximum acceleration is required.

ALPINA has paid equal attention to the hot side of the engine. The bespoke, free-flow exhaust manifold is manufactured from high carbon steel with a cobalt addition to provide very high temperature resistance. The light-weight, quad-outlet exhaust system, developed with specialist supplier Akrapovic, is optimised for gas flow as well as for acoustic characteristics, which are enhanced by opening a computer-controlled valve when the Drive Performance Control is in Sport mode and when the system identifies spirited driving.

The eight speed transmission has been developed in partnership with ZF to provide a very fast shift speed while ensuring durability with the D3 Bi-Turbo’s immense torque. Around 20 percent of the system is bespoke, developed with ZF specifically for ALPINA. Linked to recalibrated software, the system provides smooth, comfortable gear changes with no noticeable interruption to power delivery. In Manual mode, the driver can take complete control of the transmission using the unique ALPINA Switch-Tronic buttons on the back of the steering wheel for intuitive fingertip control. The driveshafts and differential are also reinforced and a limited slip differential is available as an option.

Ride and Handling

The combination of incredible performance and low emissions is matched by a remarkable ride quality and superb dynamics from the chassis. Bespoke ALPINA springs with a 40 percent higher rate work with bespoke roll-control bars, bushings and bump stops. The four-setting variable damper control has been recalibrated to provide softer compression and stiffer rebound. The system works with the revised springs and bushes to provide superb body control, particular in the sports settings, while allowing excellent bump absorption. Front camber and toe-in are optimised and a front body strengthening brace, designed specifically for the D3 Bi-Turbo, is fitted to further enhance steering feel, turn-in and dynamic consistency.

Wheels are ALPINA’s legendary ‘Classic’ style, in a new 19” design carrying non-run-flat Michelin Pilot Super Sport tyres developed in partnership with the tyre company specifically for the D3 Bi-Turbo. Enhanced tread stability and a new flank reinforcement technology reduces temperature spikes during very hard driving, ensuring consistently excellent grip in the dry complemented by a bi-compound running surface to ensure equally outstanding performance in the wet. Softer side walls contribute to the car’s superb ride quality and refinement.

Brembo callipers in ALPINA Blue announce a bespoke braking system with 370 mm discs and four piston callipers at the front and 345 mm discs with twin piston callipers at the rear. The pad specification has been selected to provide excellent temperature stability to ensure consistently good stopping performance and pedal feel during hard use without compromising feel or refinement when being driven more gently.

To help ensure that every aspect of the suspension works perfectly together, ALPINA has recalibrated the control software for the power steering, the Dynamic Stability Control and the Dynamic Traction Control. “This is a great example of the attention to detail that is applied to optimise the entire car as a unified driving system,” says Bovensiepen. “Optimising the DSC for our wheel and tyre combination means that we can deliver more performance and greater safety, with unobtrusive intervention helping to make the vehicle feel wonderfully neutral at its dynamic limits.”

Styling and Aerodynamics

The appearance of a BMW ALPINA has always been a distinctive blend of function and style. The new front spoiler provides the necessary airflow to the front brakes and through the additional heat exchangers and also works with the bespoke rear spoiler to reduce high-speed lift to almost zero.

TECHNICAL DATA