32 sightings by 29 spotters worldwide

Market value
$37,000 to $110,000
Did you know
Only 50 Alpina B4 BiTurbo convertibles were ever built.
The Alpina B4 BiTurbo is a masterstroke of automotive refinement, a car that effortlessly blends Bavarian precision with Alpina's distinctive flair. Born from the already impressive BMW 4 Series, Alpina's engineers have meticulously enhanced every aspect, from its engine internals to the subtle aerodynamic tweaks, creating a machine that feels both familiar and thrillingly unique.
Under the hood, the B4 BiTurbo boasts a 3.0-liter straight-six engine, turbocharged to perfection, delivering a silky yet ferocious 410 horsepower. Alpina's signature engineering touches—such as bespoke pistons, optimized intercoolers, and a finely-tuned exhaust system—transform the driving experience into something genuinely special. The result? Zero to sixty in a hair over four seconds, accompanied by a soundtrack that's equal parts symphony and thunderstorm.
Visually, the Alpina B4 BiTurbo strikes a tasteful balance between aggression and elegance. The iconic Alpina multi-spoke wheels, subtle aerodynamic enhancements, and discreet badging speak volumes to those in the know, without shouting to the masses. Inside, the cabin is a testament to craftsmanship, adorned with plush leather, hand-stitched detailing, and Alpina's trademark blue instrument dials—an environment that feels special every time you slide behind the wheel.

Köln, Germany
by Maximiliancln

Singapore, Singapore
by denspots

Hengelo, Netherlands
by Tanjaja

Regensdorf, Schweiz
by Timoxmarin

Spotted, China
by gtc

Zürich, Schweiz
by Roman1_055

Burkhardtsdorf, Germany
by CarspotterErzgebirge

Sankt Augustin, Germany
by ole_07

Wolfsburg, Germany
by flo_spotzzz

Singapore, Singapore
by Ast_tr0

Singapore, Singapore
by denspots

Köln, Germany
by Maximiliancln
32 Alpina B4 BiTurbo sightings have been logged on AutoRadar by 29 different spotters.
On AutoRadar's rarity scale the Alpina B4 BiTurbo is rated Uncommon.
Recent Alpina B4 BiTurbo sightings on AutoRadar come from Köln, Singapore, Hengelo, Regensdorf, Zürich, Burkhardtsdorf. The live map shows every verified sighting as it happens.
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