2006 Alpina B6 Cabrio (E64) Dimensions, Size & Specs

The curb weight of the Alpina B6 Cabrio (E64) is approximately 1930 kg (4256 lbs), while the maximum weight ranges between 2190 kg and 2350 kg (4829 lbs to 5181 lbs). This relatively heavy weight is reflective of the car’s luxury features, reinforced cabriolet structure, and performance-oriented components.

With the rear seats folded down, the Alpina B6 Cabrio offers a luggage capacity of 450 liters (about 15.9 cubic feet). This storage space is quite practical for a luxury convertible, allowing for reasonably sized luggage or shopping bags, enhancing its usability for touring or weekend trips.

Yes, the Alpina B6 Cabrio (E64) features specialized tires sized 285/30 R20 on the rear and 255/35 R20 on the front. This staggered tire setup contributes to excellent grip and handling performance, supporting the car's powerful engine and enhanced driving dynamics compared to other luxury convertibles.

With a length of 4820 mm (189.8 inches), width of 1855 mm (73 inches), and height of 1371 mm (53.9 inches), the Alpina B6 Cabrio (E64) generally fits well into a standard single-car garage, which typically accommodates vehicles up to about 5000 mm (196.9 inches) in length and 2500 mm (98.4 inches) in width. However, care should be taken regarding door opening clearance due to the car's width and tire dimensions.

The Alpina B6 Cabrio (E64), produced from 2005 to 2010, is based on the BMW 6 Series E63/E64 platform. Compared to its predecessor, the E63 coupe variant (produced from 2003), the E64 Cabrio is very similar in length and width but slightly taller due to the soft-top roof mechanism. Overall, this generation sees only minor dimensional changes, maintaining a consistent grand-tourer size and luxury convertible profile.

When compared to other luxury convertibles from the mid-2000s, such as the Mercedes-Benz CLK-Class Cabriolet or the Audi A5 Cabriolet, the Alpina B6 Cabrio (E64) is comparable in length and width but tends to be slightly heavier due to its reinforced structure and performance enhancements. Its large 20-inch wheels and wide tires also contribute to a more aggressive and muscular stance relative to its peers.

The Alpina B6 Cabrio’s length of 4820 mm and width of 1855 mm provide a stable platform for high-speed cruising and precise handling. Its substantial curb weight of 1930 kg contributes to a planted feel on the road, while the wide 20-inch tires improve grip and cornering stability. The relatively low height of 1371 mm helps keep the center of gravity low, enhancing dynamic agility despite its sizeable dimensions.

For everyday use, the Alpina B6 Cabrio’s size offers a comfortable and spacious cabin experience, typical of grand touring convertibles. While its width and length allow for a roomy interior, city parking and maneuvering may require caution due to its bulkier dimensions compared to smaller cars. Luggage space is practical, but not extensive, especially when the rear seats are in use.

The Alpina B6 Cabrio (E64) represents a high-performance, exclusive take on the BMW 6 Series convertible from Alpina, a well-regarded tuning company focusing on luxury and performance refinement. Produced from 2005 to 2010, it combined Alpina’s signature twin-turbocharged powertrains with luxury features and grand touring capabilities, standing out as a rare and desirable model that blended opulence with spirited driving.