The BMW ALPINA B4 Bi-Turbo


The design of the Coupé successfully blends powerful sportiness and elegant beauty in one flowing form. The low, extended silhouette of the Coupé is just perfect for the ALPINA CLASSIC wheels. The timeless design with twenty spokes and concealed inner valve give the Coupé a light and dynamic appearance. The oval twin tailpipes of the exhaust system are particularly distinctive and are attractively integrated into the rear apron. The Coupé accelerates from 0 to 100 km/h in just 4.2 seconds, reaching a top speed of 303 km/h. At the same time it is capable of economical cruising with a combined fuel consumption according to the ECE norm of just 7.6 l/100 km and 177 g/km CO2. This exceptional performance is also available with all-wheel drive based on the BMW xDrive system which offers maximum traction and dynamics in all conditions.


The design language of the B4 Bi-Turbo Convertible is defined by short overhangs, muscular shoulders ending in a powerful rear end, and the characteristic BMW metal folding roof. The sporty and powerful design of the front spoiler features functional air intakes and forms a perfect aerodynamic match with the discreet rear spoiler. The soundtrack of the smooth 3-litre straight-six cylinder engine with twin turbochargers is best enjoyed with the roof down. It produces 301 kW (410 hp) and a maximum torque of 600 Nm which is sent to the rear wheels via an 8-speed sport automatic transmission. The B4 Bi-Turbo Convertible accelerates from 0 to 100 km/h in just 4.5 seconds, reaching a top speed of 301 km/h. The combined fuel consumption according to the ECE norm is just 8.0 l/100 km and 186 g/km CO2.


clear your head... 

The roof, which at the push of a button closes in just 20 seconds and up to a speed of 18 km/h, transforms the convertible into a winter-proof coupé. The contour of the closed roof with its steep rear window, together with the flat boot and ALPINA rear spoiler create an absolutely unique exterior appearance. The stainless steel exhaust system with elliptical twin tailpipes emits a powerful, baritone soundtrack, making open-top motoring a pleasure for all sense.

Dynamic Handling

The adaptive ALPINA sports suspension combines electronically adjustable dampers with springs, auxiliary springs and anti-roll bars. Independent of the active dampers continuously adapting to the current driving conditions, the driver can also noticeably adjust the suspension and overall driving dynamics towards a more comfort or sport orientated setup.

Information on fuel consumption and CO2 emissions according to the applicable EU Directive VO (EU) 715/2007.

Fuel consumption, combined:7,6 l/100km8,0 l/100km
CO2 emissions combined:177 g/km186 g/km
CO2 efficiency category:DC

The disclosed fuel consumption and CO2 emissions are measured according to WLTP (Worldwide Harmonized Light-Duty Vehicles Test Procedure) and converted to NEDC (New European Driving Cycle) for comparison purposes. Depending on your country, vehicle related taxes or other duties may be based on fuel consumption and CO2 emissions data which differs from that shown here.

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.