Continuous development of the 4.4 litre V8 Bi-Turbo engine has resulted in a number of upgrades leading to a significant increase in power output. The engine now develops 441 kW (600 hp) at 6000 rpm and a maximum torque of 800 Nm between 3500 and 4500 rpm.
Two specifically constructed large diameter turbo-chargers operating in parallel are primarily responsible for achieving a high power and torque output over a very broad rpm range without sacrificing spontaneous throttle response at low rpm. The high-performance indirect inter-cooler system with a short intake system consists of a large-volume low-temperature inter-cooler and two engine-near inter-coolers. Additional oil and water coolers are located just behind the front spoiler and ensure the overall thermodynamic efficiency of the engine. Extensive optimisation of the air intake ducting and air filter housing leads to a substantial reduction of losses which together with an uprated fuel supply system results in the hike in output of 41 kW (60 hp) from previously 540 hp.
Inside the cylinders specific MAHLE pistons are designed to deal with temperatures and pressures associated with up to 1.4 bar charging and the engine’s 10.0:1 nominal compression ratio.
Despite its impressive performance characteristics and high specific power output long cruising ranges are achieveable thanks to a combined fuel consumption measured according to ECE norm of 9.4 to 10.4 l/100 km and CO2 emissions of 219 to 242 g/km, depending on the model.
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.
Information on fuel consumption and CO2 emissions according to EU Directive:
|BMW ALPINA B5 BITURBO||Saloon||Touring|
|Fuel consumption, combined:||9.5 l/100km||9.6 l/100km|
|CO2 emissions combined:||221 g/km||224 g/km|
|CO2 efficiency category:||E||D|
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.
Determined on the basis of the measured CO2 emissions taking into account the mass of the vehicle.