5 sightings by 5 spotters worldwide

Market value
$37,999 to $72,900
Did you know
Only 30 Alpina B4 BiTurbo Cabriolets were built worldwide.
The Alpina B4 BiTurbo Cabriolet is an intriguing blend of Bavarian precision and open-air exhilaration, crafted meticulously by Alpina, BMW's legendary tuning partner. Born from the already capable BMW 4 Series convertible, Alpina infused their distinct brand of automotive alchemy, transforming a polished cruiser into a genuinely thrilling driver's machine.
Under the hood lies a finely tuned 3.0-liter straight-six engine, bolstered by twin turbochargers, producing a robust 410 horsepower. Alpina's engineers didn't just slap on a couple of turbos and call it a day; instead, they meticulously recalibrated the engine management, transmission software, and cooling systems, ensuring seamless power delivery and a surprisingly refined driving experience. The result? A convertible that rockets from 0 to 60 mph in just over four seconds, all while maintaining an air of dignified composure.
Visually, the B4 BiTurbo Cabriolet subtly sets itself apart with Alpina's classic multi-spoke wheels, discreet aerodynamic enhancements, and the unmistakable Alpina pinstriping. Inside, the cabin is a masterclass in understated luxury—hand-stitched leather, bespoke Alpina badging, and a steering wheel wrapped in Lavalina leather that feels tailor-made for spirited driving. It's a car that whispers its exclusivity rather than shouting it, appealing to the discerning enthusiast who appreciates subtlety over flash.
5 Alpina B4 BiTurbo Cabriolet sightings have been logged on AutoRadar by 5 different spotters.
On AutoRadar's rarity scale the Alpina B4 BiTurbo Cabriolet is rated Uncommon.
Recent Alpina B4 BiTurbo Cabriolet sightings on AutoRadar come from Zagreb, Chichester, Glyfada, Hampton, Rottach-Egern. The live map shows every verified sighting as it happens.
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