2014 Alpina B4 Coupe Dimensions, Size & Specs

The Alpina B4 Coupe has a curb weight ranging from 1615 kg (3561 lbs) to 1680 kg (3704 lbs), depending on specifics and equipment. The maximum allowable weight is between 2135 kg (4706 lbs) and 2200 kg (4850 lbs). This weight range balances the car's strong performance outputs with stability and ride comfort. While the car is relatively heavy for its size, Alpina’s tuning ensures that performance remains sharp, aided by powerful engine options and a finely tuned chassis.

The Alpina B4 Coupe provides a luggage capacity of 445 liters (approximately 15.7 cubic feet). This is quite generous for a coupe of its class, offering enough space for weekend trips or daily errands. The trunk is designed to maximize usable space, accommodating suitcases and larger items with relative ease, making it practical despite the sporty coupe layout. However, as a two-door coupe, rear-seat space is more limited compared to sedans or SUVs.

The Alpina B4 Coupe rides on 20-inch rims with sizes of 8J x 20 at the front and 9J x 20 at the rear. It uses low profile tires sized 245/30 ZR20 in front and 265/30 ZR20 at the rear. These large wheels and wide tires enhance grip, cornering stability, and overall responsiveness, which are vital for a performance-oriented coupe. The staggered setup also improves rear traction, supporting the car’s sporty character while maintaining a comfortable ride thanks to Alpina's suspension tuning.

Yes, the Alpina B4 Coupe's dimensions generally allow it to fit comfortably within a standard residential garage. Typical single-car garages have interior widths ranging from 2400 mm to 3000 mm (94 to 118 inches) and lengths from 4800 mm to 6000 mm (189 to 236 inches). With a width of 1825 mm (71.9 inches) and length of 4640 mm (182.7 inches), the B4 Coupe fits well within these parameters, leaving enough clearance for opening doors and maneuvering. However, it’s always recommended to check specific garage sizes to ensure compatibility.

Compared to its predecessor, the Alpina B4 Coupe introduced in 2014 typically shows a modest increase in length and width, reflecting contemporary design trends aimed at improving interior space and road presence. For example, previous Alpina B3 models were slightly shorter and narrower, which translated to a more compact footprint but less aerodynamic refinement. The 2014-2017 B4’s length of 4640 mm and width of 1825 mm represents a contemporary balance between sporty proportions and practical usability, with improvements in cabin comfort and driving dynamics.

When compared to rival luxury sport coupes like the BMW M4 or Audi RS5, the Alpina B4 Coupe is competitive in size and weight. With its length of 4640 mm and width of 1825 mm, it is slightly larger than some compact sport coupes but similar to others in the segment. The curb weight ranging from 1615 to 1680 kg places it on par with or slightly heavier than competitors due to Alpina's luxury equipment and performance tuning. Overall, the B4 Coupe offers a mix of sporty dimensions and refined features that hold their own in its class.

With a height of 1373 mm (54.1 inches) and a width of 1825 mm (71.9 inches), the Alpina B4 Coupe is designed to enhance both aerodynamic efficiency and road stability. Its relatively low height lowers the center of gravity, contributing to reduced body roll and sharper handling during aggressive driving or tight cornering. Meanwhile, the wide stance improves grip and stability by distributing weight more evenly across the tires, helping the car maintain composure at high speeds or during sudden maneuvers.

The Alpina B4 Coupe's luggage space of 445 liters (about 15.7 cubic feet) makes it quite practical for longer trips and everyday use compared to many other coupes. This capacity allows for the storage of multiple suitcases or a combination of travel bags and shopping items, addressing one key limitation of many sports coupes which often sacrifice cargo space for style and performance. While rear seat passenger space may limit larger groups, the generous trunk capacity supports usability beyond just performance driving.

The curb weight of the Alpina B4 Coupe ranges between 1615 and 1680 kg (3561 - 3704 lbs), relatively heavy for a compact coupe but well justified by the car's luxury equipment and robust build quality. The weight contributes to a stable and planted feel on the road, improving ride comfort and high-speed stability, which is crucial for a grand touring coupe. However, the extra mass could slightly reduce fuel efficiency compared to lighter competitors, but Alpina’s finely tuned engines and aerodynamics strive to balance performance with reasonable fuel economy.