2021 BMW 4 Series Convertible (G23) Dimensions, Size & Specs

The curb weight of the BMW 4 Series Convertible (G23) varies between 1690 kg and 1980 kg (3726 to 4365 lbs), depending on the variant and equipment. The vehicle's maximum permissible weight ranges from 2185 kg to 2480 kg (4819 to 5468 lbs). This gives a payload capacity allowing for passengers, cargo, and optional equipment while maintaining optimal driving dynamics and safety.

The standard luggage capacity of the BMW 4 Series Convertible (G23) is 300 liters (10.6 cubic feet), which is decent for a convertible in its class. By folding down the rear seats, the cargo space expands to 385 liters (13.6 cubic feet), allowing for increased storage flexibility when transporting larger items, although the convertible roof mechanism slightly limits maximum space.

The ride height or ground clearance of the BMW 4 Series Convertible (G23) ranges between 124 mm and 127 mm (4.9 to 5 inches). This relatively low clearance is typical for sporty cabriolets, enhancing aerodynamic efficiency and handling stability at higher speeds. However, it means the car is best suited for well-maintained roads rather than rough terrains or off-road conditions.

The BMW 4 Series Convertible (G23) offers a variety of rim sizes ranging from 17-inch to 19-inch wheels, specifically 7.5J x 17, 8.5J x 18, 7.5J x 18, 8J x 18, 8J x 19, and 8.5J x 19. Corresponding tire sizes include 225/50 R17 98Y XL, 255/40 R18 99, 225/45 R18, 225/50 R17, 225/40 R19, 255/35 R19, and 250/40 R18. These combinations allow owners to tailor performance, aesthetics, and comfort to their preference.

With its length of about 4.77 meters (approximately 15.6 feet), width of 1.85 meters (6.1 feet) excluding mirrors, and height around 1.39 meters (4.6 feet), the BMW 4 Series Convertible (G23) generally fits comfortably into a standard residential garage. The width with mirrors extended is roughly 2.08 meters (6.8 feet), which requires careful mirror folding or enough garage clearance. Most standard garages are designed to accommodate a car of this size, but owners should confirm exact garage dimensions to avoid tight squeezes.

Compared to its predecessor, the G23 generation BMW 4 Series Convertible is slightly larger, offering improved passenger comfort and cargo capacity. The length has increased modestly, pushing closer to 4.77 meters (187.7 inches) from the predecessor’s shorter length, while maintaining a similar width around 1.85 meters (72.9 inches). The height remains low and sporty but slightly taller in some variants, contributing to a more spacious cabin without losing the car’s sleek silhouette. Overall, these dimensional changes result in better ergonomics and practicality.

When compared to competitors such as the Audi A5 Cabriolet or Mercedes-Benz C-Class Cabriolet, the BMW 4 Series Convertible (G23) offers competitive dimensions and specifications. Its length near 4.77 meters and width of 1.85 meters are almost on par with these rivals, while its luggage capacity of 300 liters is typically average for this segment. Weight-wise, it falls slightly toward the heavier spectrum due to its advanced features and robust build, but balances this with performance. The G23 stands out with sporting dynamics and distinctive BMW styling, making it a strong contender in the luxury convertible market.

The BMW 4 Series Convertible (G23) has been produced from 2020 to 2024, representing the latest generation of BMW’s 4 Series Cabriolet. It is renowned for combining sporty performance, luxury, and the open-air driving experience. Key features include a retractable soft-top roof, advanced driver assistance systems, modern infotainment, and multiple engine options ranging from efficient four-cylinder to powerful six-cylinder units. The G23 has been designed with a focus on agility, aerodynamic efficiency, and premium comfort, making it a versatile choice for drivers seeking style and performance.

The BMW 4 Series Convertible (G23) offers various wheel and tire configurations from 17 to 19 inches, impacting ride quality, handling, and aesthetics. Larger rims paired with lower profile tires, such as 19-inch wheels with 255/35 or 250/40 tires, deliver sharper cornering and a sportier feel but may reduce ride comfort on rough roads. Smaller wheels like the 17-inch with 225/50 tires tend to provide a smoother ride and better absorption of bumps but with slightly less dynamic responsiveness. Owners can select setups depending on their preference for sportiness versus comfort.