2017 Alpina B4 Cabrio (facelift 2017) Dimensions, Size & Specs

The curb weight of the Alpina B4 Cabrio facelift generated between 2017 and 2019 ranges between 1840 kg to 1915 kg (4056 to 4221 lbs), depending on specific configurations and optional equipment. Its maximum permissible weight is 2300 kg (5071 lbs), accommodating passengers, cargo, and fluids within this limit.

With the roof up or down, the Alpina B4 Cabrio offers a luggage capacity of 220 liters (7.8 cubic feet). If you fold the rear seats, the cargo room expands to 370 liters (13.1 cubic feet), providing enhanced versatility for carrying larger items while maintaining its cabriolet functionality.

The Alpina B4 Cabrio facelift features front wheels sized 8J x 20 and rear wheels 9J x 20. The tires are 245/30 ZR20 on the front and 265/30 ZR20 on the rear, which contribute to improved grip, handling precision, and the car’s dynamic road presence, especially important for a performance-oriented cabriolet.

Yes, the Alpina B4 Cabrio facelift does fit into a standard residential garage. Typical garage widths are around 2400 to 2700 mm (94.5 to 106.3 inches) and heights often exceed 2000 mm (78.7 inches). With a width of 1825 mm (71.9 inches) and height of 1380 mm (54.3 inches), it has ample clearance and maneuverability for most home garage spaces.

Compared to its predecessor, the Alpina B4 Cabrio facelift maintains similar exterior dimensions but incorporates subtle styling changes and slight dimensional tweaks to enhance aerodynamics and cabin space. Typically, the facelifted version may be marginally longer or wider by a few millimeters to accommodate updated bumper designs and safety features, but the core size remains very close to its earlier iteration for continuity in driving dynamics and parking ease.

In comparison to similar premium cabriolets like the BMW M4 Convertible or Audi RS5 Cabriolet of the same era, the Alpina B4 Cabrio facelift has competitive exterior dimensions. While the B4 measures 4640 mm in length and 1825 mm in width, the M4 Convertible is slightly shorter and narrower in some trims, whereas the Audi RS5 Cabriolet is often comparable or a bit larger. The B4 strikes a balance between sporty compactness and spaciousness typical of luxury cabriolets.

The Alpina B4 Cabrio facelift stands at 1380 mm (54.3 inches) tall, a height that ensures a low center of gravity to improve handling and stability. Although official ground clearance varies by suspension setup, it typically provides enough clearance for routine urban and suburban driving, including entry to most parking garages, speed bumps, and driveways without issue.

With its footprint defined by a length of 4640 mm (182.7 inches) and a width of 1825 mm (71.9 inches), the Alpina B4 Cabrio facelift offers a sporty yet practical size. This footprint provides a favorable balance between high-speed stability and nimble maneuverability, allowing it to handle city traffic and tight parking spaces relatively easily despite its performance-oriented setup.

The facelift introduced in 2017 for the Alpina B4 Cabrio mostly focused on styling updates, interior enhancements, and mechanical improvements rather than significant changes to exterior dimensions. Minor modifications, such as revised bumpers and updated lighting, might have altered the exact measurements by a few millimeters, but overall length, width, and height remained essentially consistent with the prior generation.