For more than four decades now, German tuning house Alpina has been modifying BMWs cars. The Bavarian luxury carmaker has a tight relationship with the tuner going as far distributing the high-performance models through its official network.
Alpina's newest creation is the B6 Bi-Turbo Cabrio based on the latest 6-Series Convertible, which will make its world premiere at the rapidly approaching Frankfurt auto show on September 13. At the heart of the Alpina B6 Bi-Turbo Cabrio is specially modified 4.4-liter twin-turbocharged V8 engine capable of delivering 507-horsepower and a monstrous 700Nm (516.3 lb-ft) of peak torque delivered between 3,000 and 4,750 rpm.
Power is channeled to the rear wheels through an eight-speed automatic Switch Tronic transmission, with Alpina claiming 0-100km/h (62mph) sprint time of 4.8 seconds and a top speed of 311km/h (193mph) with a combined fuel consumption of 10.9lt/100km (21.6mpg US) for the Convertible model.
In comparison, the factory 650i Convertible features a 4.4-liter turbo V8 producing 407HP and 600Nm / 443 lb-ft. It completes the standard sprint in 5.0 seconds while reaching an electronically limited top speed of 250 km/h (155 mph), and returning an average fuel consumption of 10.7lt/100km.
Along with the powertrain modifications, the Alpina flavored 6-Series Convertible gains the tuner's trademark multispoke alloy wheels plus carbon fibre trim bits, front apron and rear spoiler as well as bespoke interior parts.
The B6 Bi-Turbo Cabrio model will soon be followed up by the coupe derivative.