2026 Audi A6 Avant (C9) Dimensions, Size & Specs

The curb weight of the Audi A6 Avant (C9) ranges from 1790 kg to 2165 kg (3946 to 4773 pounds), depending on the variant and equipment level. The maximum permissible weight (gross vehicle weight) is between 2415 kg and 2775 kg (5325 to 6117 pounds). This range allows for variations between fully equipped models and lighter versions. These weight figures impact fuel efficiency, handling, and performance, indicating a solidly built car with premium materials and advanced safety equipment contributing to curb weight.

The luggage capacity with the rear seats in place in the Audi A6 Avant (C9) ranges from 404 to 503 liters (14.3 to 17.8 cubic feet). When the rear seats are folded down, this capacity significantly expands to between 1423 and 1534 liters (50.3 to 54.1 cubic feet). This makes the A6 Avant highly versatile for transporting large or bulky items, making it an excellent choice for families or individuals requiring practical cargo space without sacrificing passenger comfort.

Most standard garages have dimensions roughly 2.4 to 2.7 meters (7.9 to 8.9 feet) in width and 5 to 6 meters (16.4 to 19.7 feet) in length. The Audi A6 Avant (C9), with a length of 4999 mm (196.7 inches) and width of 1875 mm (73.8 inches) without mirrors, fits comfortably in most standard garages. However, when mirrors are opened, the width increases to 2099 mm (82.6 inches), which may be tight in narrow garages. Owners should be cautious about the mirror width especially when considering garages with less than standard width. The vehicle's height (1472 mm / 57.9 inches) should not pose any clearance issues.

Compared to its predecessor, the previous generation Audi A6 Avant (C8), the 2026 C9 generation is slightly larger in length and width, reflecting a trend towards a more spacious and luxurious interior and increased cargo volume. The C9 measures 4999 mm in length versus approximately 4959 mm for the C8, offering about 4 centimeters (1.6 inches) more length. Width is similar but the C9 has a wider stance with mirrors opened, improving presence and potentially contributing to better on-road stability. Weight has increased slightly due to added tech and safety features, but the enhancements bring improved comfort and advanced functionalities. Overall, the C9 provides more interior space and loading capacity without making the vehicle noticeably bigger to drive or park.

In comparison with other premium mid-size station wagons such as the BMW 5 Series Touring, Mercedes-Benz E-Class Estate, and Volvo V90, the Audi A6 Avant (C9) shares very similar overall dimensions. Its length of 4999 mm (196.7 inches) and width of 1875 mm (73.8 inches) place it competitively in the segment. For example, the BMW 5 Series Touring is roughly around 4,939 mm (194.4 inches) long, slightly shorter than the A6 Avant. Cargo capacity is also on par or slightly better than competitors, particularly with rear seats folded. Audi’s balance of luxury, space, and technology ensures it stays competitive in size while offering a premium driving experience.

The 2026 Audi A6 Avant (C9) comes with a range of rim sizes, allowing buyers to choose from practical to sportier options. Rim sizes offered are 7.5J x 17, 8J x 18, 8.5J x 18.5, 8.5J x 19, 8.5J x 20, and 8.5J x 21 inches. Corresponding tire sizes range from 225/60 R17 for more comfort and efficiency, up to 255/35 R21 which cater to sportier handling and aesthetics. This variety helps adapt the car either for more dynamic driving or for comfort and long-distance travel while maintaining premium road grip and safety.

The Audi A6 Avant (C9) has a roof load capacity of 100 kg (220 pounds). This figure is typical for premium station wagons in its class and is adequate for carrying roof boxes, bike racks, or roof rails for additional cargo needs. This load capacity aligns with similar competitors in the segment, ensuring owners can safely and securely expand the cargo capabilities when needed without compromising vehicle handling or safety.

With a height of 1472 mm (57.9 inches), the Audi A6 Avant (C9) maintains a low and sleek profile typical of premium station wagons. This height contributes positively to aerodynamic efficiency, reducing drag for better fuel economy and a quieter cabin at speed. Despite the relatively low roofline, Audi has engineered the interior to maximize headroom, especially for front and rear passengers, ensuring comfort without sacrificing styling or performance. The lower height also enhances road handling and stability.

The Audi A6 Avant (C9) offers flexible cargo space configurations with 404 to 503 liters (14.3 to 17.8 cubic feet) of luggage capacity in the standard rear seat position. Folding down the rear seats increases the capacity dramatically to between 1423 and 1534 liters (50.3 to 54.1 cubic feet). These configurations allow users to quickly adapt the interior to transport large, bulky items or everyday groceries and luggage. The flat loading floor when seats are folded and a wide rear opening further enhance usability, making the A6 Avant a highly practical station wagon for family trips, sports gear, or professional use.