2021 Audi S3 Sedan (8Y) Dimensions, Size & Specs

The curb weight of the 2021 Audi S3 Sedan (8Y) is 1505 kg (3317 lbs), while its maximum permissible weight is 2025 kg (4464 lbs). A curb weight on the lighter side for a performance sedan allows for agile handling, quicker acceleration, and better fuel economy. The maximum weight indicates the total weight the vehicle can safely handle including passengers and cargo, which affects handling and braking performance when fully loaded.

The Audi S3 Sedan (8Y) offers a luggage capacity of 325 liters (approximately 11.5 cubic feet). This space is decent for a compact sports sedan, suitable for daily commuting, weekend trips, or light shopping. While it may not match larger sedans or SUVs in volume, the trunk space is optimized for practicality within a sporty and compact body.

The standard tire size on the 2021 Audi S3 Sedan (8Y) is 225/40 R18 92 Y XL, mounted on 8 J x 18 rims. These low-profile tires and 18-inch rims contribute to responsive handling, a sportier feel, and enhanced road grip, especially during spirited driving. However, they may lead to a firmer ride compared to models with smaller wheels or higher profile tires.

A standard garage typically measures about 2.4 meters (8 feet) in width. The Audi S3 Sedan has a width of 1816 mm (71.5 inches) without mirrors, which fits well within the standard garage width. However, with mirrors opened, its width extends to 1984 mm (78.1 inches), leaving limited clearance on sides in a narrow garage. Drivers may need to fold mirrors or exercise caution when parking in tight spaces, but generally, the S3 Sedan fits comfortably in most standard garages.

Compared to the previous generation Audi S3 Sedan (8V), the 8Y model is slightly longer at 4504 mm (177.2 inches) compared to approximately 4350 mm (171.3 inches) of the 8V. The width remains similar, but the 8Y features updated exterior styling that emphasizes a wider-road feel. Height is marginally reduced for a sleeker profile. Overall, the 8Y generation offers improved cabin space, a sportier stance, and more refined proportions, enhancing both aesthetics and dynamics over its predecessor.

The Audi S3 Sedan (8Y) falls within similar size parameters as its rivals. For instance, the BMW M235i xDrive Sedan measures about 4534 mm (178.5 inches) in length and 1827 mm (71.9 inches) in width, while the Mercedes-AMG A35 Sedan measures around 4534 mm (178.5 inches) long and spans approximately 1796 mm (70.7 inches) wide. The dimensions show the S3 is slightly shorter but similarly wide, balancing agility with cabin space. This competitive size positioning caters well to customers seeking compact performance sedans with sporty appeal and daily usability.

The Audi S3 Sedan (8Y) has a roof load capacity of 75 kg (165 lbs), which is the maximum safe weight that can be added to the roof, including any roof rack and cargo. While not as high as some SUVs or larger vehicles, this capacity is sufficient for lightweight roof racks carrying items such as bikes, skis, or a small roof box. Users should ensure that the roof rack and any attachments weigh less than the total allowed roof load to maintain vehicle safety and handling.

Despite its compact exterior dimensions, the Audi S3 Sedan (8Y) provides a surprisingly spacious interior for rear passengers. The optimized cabin design, combined with its 4504 mm length, offers adequate legroom and headroom for a compact sports sedan. The slightly reduced height (1415 mm) does not compromise comfort thanks to careful interior packaging. Rear occupants can expect good seating comfort for short to moderate journeys, though taller passengers might find it a bit cozy on long trips.

The Audi S3 Sedan (8Y) benefits from a sleek aerodynamic design, aided by its moderate height of 1415 mm (55.7 inches) and width of 1816 mm (71.5 inches). Lower height helps reduce drag, while the wider stance improves stability at higher speeds. Audi’s design incorporates active aerodynamic features and carefully sculpted bodywork to lower the drag coefficient, enhancing fuel efficiency and high-speed stability. This aerodynamic focus contributes to the car's sporty character and efficiency.