Alpina has released the first teaser image of the B4 Bi-Turbo Cabrio ahead of its debut at the Geneva Motor Show.

Alpina has released the first teaser image of the B4 Bi-Turbo Cabrio ahead of its debut at the Geneva Motor Show.

Based on the BMW 4-Series Convertible, the B4 Bi-Turbo has been equipped with a tastefully restrained body kit, a sports exhaust system and 20-inch alloy wheels.

Interior changes are limited but model has heated leather sport seats, a sport steering wheel and Alpina branded door sills plates. Other highlights include embroidered headrests and special floor mats.

Like the B4 Bi-Turbo Coupe, the Cabrio is powered by a twin-turbo 3.0-liter six-cylinder engine that produces 410 HP (301 kW) and 600 Nm (443 lb-ft) of torque. It is connected to an eight-speed automatic transmission which enables the car to accelerate from 0-100 km/h in 4.5 seconds and hit a top speed of 301 km/h (187 mph). In terms of efficiency, owners can expect to average 8.0 L/100km (29.4 mpg US / 35.3 mpg UK).

The B4 Bi-Turbo Cabrio will go on sale this spring and pricing reportedly starts at €74,800 ($102,810 / £61,510).

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Alpina B4 Bi-Turbo Cabrio headed to Geneva