2019 BMW M8 Convertible (F91) Dimensions, Size & Specs

The BMW M8 Convertible (F91) has a curb weight of 2010 kg (approximately 4430 lbs) and a maximum weight of 2440 kg (around 5379 lbs). The substantial mass reflects the inclusion of its robust M performance engine, chassis reinforcements, and luxury equipment, including the convertible roof mechanism. Despite this weight, the car's dynamic engineering, including adaptive suspension and powerful brakes, ensures agile handling. However, the added weight relative to non-convertible models can slightly affect acceleration and fuel efficiency but overall balances luxury and performance well.

Without mirrors, the BMW M8 Convertible measures 1907 mm (75.0 inches) wide, but with the side mirrors opened, the width increases significantly to 2137 mm (84.1 inches). This wider measurement is important to consider when driving through narrow streets or parking in tight spaces such as standard garages or parking spots, as the extended width can challenge maneuverability. Drivers should be mindful of these mirror widths to avoid scrapes or collisions in confined areas.

Standard garage dimensions typically range around 2.4 to 2.7 meters (7.9 to 8.9 feet) in width and 4.8 to 6 meters (15.7 to 19.7 feet) in length. The BMW M8 Convertible's width of 1907 mm (75.0 inches, or 1.9 meters) without mirrors and length of 4867 mm (191.6 inches, or 4.87 meters) means it comfortably fits inside most standard garages with space to spare. However, once you factor in the opened mirror width of 2137 mm (84.1 inches, or 2.13 meters), you should ensure the garage door and interior space can accommodate this width especially when parking or opening doors to exit. Overall, it is generally suitable for most standard garages.

The BMW M8 Convertible offers a luggage capacity of 350 liters (approximately 12.36 cubic feet) with the rear seats folded down. This capacity is modest compared to larger sedans or SUVs but is typical for a high-performance convertible where trunk space is often compromised by the retractable roof mechanism. The 350-liter space is sufficient for a couple of medium-sized suitcases or daily essentials, making it practical for weekend trips or daily errands, but less suitable for carrying bulky or large amounts of cargo.

Compared to its predecessor, the BMW M8 Convertible (F91) generally features slightly evolved dimensions aimed at improving aerodynamics and interior space. While exact predecessor measurements vary depending on the model compared (such as the BMW M6 Convertible), the F91 is a bit longer and wider, offering a more aggressive road presence and additional interior comfort. The height remains low, maintaining a sporty profile. Weight has increased due to modern safety and performance equipment, but technological advancements have balanced this to maintain driving dynamics.

When compared to similar high-performance convertibles like the Audi R8 Spyder or Mercedes-AMG GT Roadster, the BMW M8 Convertible (F91) is generally larger in length and width, contributing to more interior space and comfort. Its 4867 mm length and 1907 mm width exceed many rivals, translating to a more spacious cabin and slightly larger trunk capacity versus some competitors who prioritize sportiness over practicality. However, this size may make tight urban driving slightly more challenging. BMW also balances luxury, technology, and performance, positioning the M8 Convertible as a versatile grand tourer among sporty convertibles.

The BMW M8 Convertible (F91) comes equipped with performance-focused tire and rim sizes, including rims sized 10.5J x 19, 9.5J x 19, 10.5J x 20, and 9.5J x 20 inches to accommodate seasonal or performance tire options. Tire sizes include 285/40 ZR19 107Y XL, 275/40 ZR19 105Y XL, 285/35 ZR20 104Y XL, and 275/35 ZR20 102Y XL, chosen to maximize grip, handling, and braking capabilities. Wider rear tires enhance traction and stability during acceleration, while the staggered front and rear setups optimize steering response and cornering precision. This combination ensures the M8 Convertible delivers a dynamic and confident driving experience.

The size and curb weight of the BMW M8 Convertible (F91) significantly influence its fuel efficiency and performance. Weighing approximately 2010 kg (4430 lbs), including performance and luxury features, means the engine must exert more effort compared to lighter models. The larger dimensions contribute to a relatively higher frontal area, affecting aerodynamic drag especially at higher speeds. Despite this, the M8 Convertible’s powerful engine and advanced engineering, including lightweight materials and efficient turbocharged powertrains, deliver strong acceleration and performance while striving to optimize fuel consumption. However, fuel efficiency is naturally lower relative to smaller, lighter vehicles due to this weight and size.

The BMW M8 Convertible (F91) offers a luxurious and spacious cabin for front passengers, typical of a high-end grand tourer convertible. Its wider body dimensions (1907 mm width) allow comfortable seating with ample shoulder room. However, rear seats are generally more suited for occasional use, given the typical constraints of a convertible roof design limiting headroom and space. The overall design prioritizes sportiness while maintaining comfort through high-quality materials, advanced climate control, and noise insulation. The low roof height provides an engaging driving experience but might reduce vertical cabin space, especially when the roof is closed.