B6 BITURBO

Powertrain

The 4395 cm³ eight-cylinder engine delivers a power output of 397 kW (540 hp) at a moderate 5200 to 6250 rpm and a maximum torque of 730 Nm between 2800 to 5000 rpm. The Bi-Turbo engine concept consist of two ALPINA-specific turbochargers arranged in the V of the engine that operate in parallel. They are equipped with high-performance, flow-optimised vanes and housings. The turbochargers provide maximum torque over a wide rpm range and also ensure instantaneous response at low engine speeds. The indirect intercooling system with short intake paths and flow-optimised charge-air routing is responsible for highly efficient operation. The high-performance system guarantees thermally adequate cooling by means of a large-volume low-temperature intercooler and close-coupled intercoolers. The other media cooling required due to the high power output is realised by means of large-capacity oil and coolant radiators located behind the front spoiler. MAHLE high-performance pistons run in the cylinders and are specially matched to the thermodynamic loads of the engine, which is charged to 1.2 bar and has a compression ratio of 10.0:1.Petrol direct injection, VALVETRONIC and BMW Efficient Dynamics technologies such as the Auto Start Stop function make it possible to achieve a combined fuel consumption in accordance with the ECE norm of only 9.4 to 10.4 l/100 km and emissions of 219 to 242 g/km CO2, depending on model.

Exhaust System Gran Coupé

The construction and design of the stainless steel exhaust system guarantees an elegant, powerful look and a very emotional soundtrack. A reduction of the silencer volume optimises the flow of exhaust gases and saves weight. The special design of the system also focuses on acoustics and does not disappoint, producing a powerful, bass driven eight cylinder soundtrack. An intelligent exhaust valve makes it possible to successfully achieve the balancing act between audible pleasure and long-distance comfort. The exhaust valve is closed when the Dynamic Performance Control is set to Comfort mode and opens depending on load and engine speed. In contrast, it is permanently open in Sport mode, generating an exciting sound experience especially under acceleration. A high-tech lightweight exhaust system made of high-strength titanium developed in cooperation with Akrapovič offers a weight saving of 45 % compared with stainless steel and is optionally available at extra cost.

Exhaust Systen Coupé / Convertible

The lightweight exhaust system made of high-strength titanium was developed in cooperation with the renowned manufacturer of motor sports exhaust systems, namely Akrapovič. Faithful to the guiding principle of ‘form follows function’, the entire system is noted not only for its acoustics and appearance, but also for its technical refinements. In addition to a weight-saving of 45 % compared to the conventional use of stainless steel, the exhaust system also boasts impressive technical details. The engineers from ALPINA and Akrapovic have achieved quite a feat, managing to retain a diameter of 2 x 70mm throughout the entire length of the exhaust system, despite the tricky ‘packaging’. In conjunction with further design refinements, exhaust back-pressure is reduced to an absolute minimum. In interaction with the powerful engine, the exhaust system generates a backdrop of deep, sonorous eight-cylinder sound – powerful, sporty, but never obtrusive, due to an intelligent, controllable exhaust valve. This offers the driver a special degree of influence over the sound experience, and can be controlled using the Dynamic Drive Control. In Comfort+ and Comfort mode the valve is closed, opening only by decisive use of the accelerator. In Sport and Sport+ mode, the exhaust valve remains open at all times for a specially enjoyable sound experience.



Information on fuel consumption and CO2 emissions according to VO (EG) 715/2007:


BMW ALPINA B6 BITURBOCoupéConvertibleGran Coupé
Fuel consumption, combined:9.4 l/100km9.6 l/100km10.4 l/100km
CO2 emissions combined:219 g/km224 g/km242 g/km
CO2 efficiency category:EEE

Further information on specific fuel consumption and specific CO2 emissions of new passenger cars is given in „Leitfaden über den Kraftstoffverbrauch, die CO2-Emissionen und den Stromverbrauch neuer Personenkraftwagen” which can be obtained free of charge at all points of sale and from the Deutsche Automobil Treuhand GmbH (DAT), Helmut-Hirth-Str. 1, 73760 Ostfildern-Scharnhausen.

Efficiency-Class

Determined on the basis of the measured CO2 emissions taking into account the mass of the vehicle.