2021 BMW M4 Convertible (G83) Dimensions, Size & Specs

The curb weight of the BMW M4 Convertible (G83) is approximately 1920 kg (4233 lbs), which includes the standard equipment and fluids necessary for operation. The maximum permissible weight, which accounts for passengers, cargo, and any additional load, is 2345 kg (5171 lbs). This weight profile ensures the vehicle maintains its performance-oriented characteristics while accommodating passengers and luggage without compromising safety or handling.

The BMW M4 Convertible (G83) offers a luggage compartment with a capacity of 300 liters (approximately 10.6 cubic feet) under normal conditions. When the rear seats are folded down, the luggage space expands to 385 liters (about 13.6 cubic feet). This flexibility allows for increased storage capacity, which is particularly useful when transporting larger items or luggage, enhancing the practicality of this sporty cabriolet.

The ride height or ground clearance of the BMW M4 Convertible (G83) stands at 121 mm (4.8 inches). This relatively low clearance is typical for performance-oriented sports cars, contributing to a lower center of gravity for enhanced handling and stability. While it improves aerodynamic characteristics and cornering performance, drivers should be cautious in areas with steep speed bumps or uneven terrain to avoid undercarriage contact.

The BMW M4 Convertible (G83) comes equipped with performance-focused wheels and tires to match its sporty character. The rims measure 10.5J x 20 inches on the front and 9.5J x 19 inches on the rear. Tire sizes are 285/30 R20 for the front and 275/35 R19 for the rear. This staggered setup helps optimize traction, handling precision, and cornering stability, while also contributing to the aggressive stance and visual appeal of the vehicle.

With a length of 4794 mm (188.7 inches) and a width of 1887 mm (74.3 inches), the BMW M4 Convertible (G83) can fit into most standard residential garages, which typically accommodate cars up to around 6 meters (approximately 236 inches) in length and 3 meters (118 inches) in width. However, its width with side mirrors included might be slightly wider, so careful maneuvering is necessary. Its height of 1395 mm (54.9 inches) ensures ample vertical clearance, making it suitable for common garage door heights. Overall, the M4 Convertible should be comfortably accommodated in standard garages.

Compared to the predecessor F83 BMW M4 Convertible (produced until 2020), the G83 generation is larger and slightly heavier. The G83 measures 4794 mm in length, which is an increase over the previous generation's approximate length of 4645 mm, offering more interior space and improved road presence. The width also increased to 1887 mm from roughly 1877 mm, aiding stability and handling. In terms of weight, the G83’s curb weight is approximately 1920 kg, modestly heavier due to the addition of modern safety features and structural reinforcements to improve rigidity and safety. These dimensional and weight changes contribute to the G83’s enhanced performance, comfort, and dynamic capabilities over its predecessor.

Compared to similar luxury sports convertibles such as the Audi RS5 Cabriolet, Mercedes-AMG C63 Cabriolet, and Porsche 911 Cabriolet, the BMW M4 Convertible (G83) sits competitively in terms of size. Its length of 4794 mm (188.7 inches) is similar or slightly larger than these rivals, offering a blend of sporty proportions and practicality. For example, the Audi RS5 Cabriolet measures about 4687 mm (184.5 inches) in length. In width, the M4’s 1887 mm (74.3 inches) is on par or wider, enhancing road presence and stability. The weight of around 1920 kg (4233 lbs) reflects the high-performance components and features typical of its class. Overall, the M4 Convertible combines a sporty yet spacious footprint that aligns well with, or slightly surpasses, its main competitors.

The BMW M4 Convertible (G83) distinguishes itself with a compelling blend of aggressive styling, cutting-edge technology, and exhilarating performance. Featuring BMW's signature large kidney grille and muscular body lines, it projects a bold and athletic stance. Under the hood, it typically houses a potent inline-six turbocharged engine delivering impressive horsepower and torque, providing thrilling acceleration and dynamic driving engagement. The convertible’s advanced suspension and chassis tuning enhance handling precision while maintaining comfort. Additionally, the retractable hardtop combines the allure of open-air driving with the security and insulation of a coupe. Together, these attributes make the G83 M4 Convertible a highlight in the luxury sports convertible market.

The BMW M4 Convertible (G83) offers practicality through its relatively spacious luggage capacity for a sports cabriolet—300 liters (10.6 cubic feet), expandable to 385 liters (13.6 cubic feet) with rear seats folded. Its comfortable interior and advanced infotainment features suit daily commuting and longer journeys alike. However, as a performance-oriented convertible with a low ground clearance of 121 mm (4.8 inches), drivers may need to be cautious on rough roads or speed bumps. The vehicle's width (1887 mm / 74.3 inches) demands considerate parking and maneuvering in tighter urban spaces. Overall, while focused on driving pleasure, the M4 Convertible balances practicality well for everyday use, especially for enthusiasts who appreciate both performance and open-top freedom.