2021 Lamborghini Sian Roadster Dimensions, Size & Specs

The Sian Roadster’s width with mirrors opened is 2265 mm (89.2 inches), which is broader than many standard cars. This wider stance enhances road presence and stability at high speeds but requires extra caution when parking in narrow spaces or driving through tight urban areas. Awareness of this over two-meter-plus width is crucial to avoid scrapes or collisions.

The Sian Roadster, measuring nearly 5 meters (16.3 feet) long and over 2 meters (around 7.4 feet) wide including mirrors, can fit into most standard garages. However, due to its width with opened mirrors (2265 mm / 89.2 inches), careful maneuvering is needed. Its low height (1158 mm / 45.6 inches) means ample vertical clearance, but owners should ensure their garage width comfortably exceeds 2.3 meters for ease of access.

Compared to the Aventador Roadster, the Sian Roadster is slightly longer and wider. The Aventador Roadster measures approximately 4900 mm (192.9 inches) in length and 2116 mm (83.3 inches) in width, but the height and weight of the Sian are marginally lower, reflecting Lamborghini's emphasis on hybrid technology and aerodynamics. The Sian's length (4979 mm) and weight (1645 kg) showcase advancements in design to balance performance with hybrid efficiency.

The Sian Roadster runs on large performance tires sized 355/25 ZR21 (front) and 255/30 ZR20 (rear), mounted on 13J x 21 H2 and 9J x 20 H2 rims respectively. These wide tires provide exceptional grip and handling on the road, essential for a car capable of high speeds and precise cornering. The rim sizes enhance stability and allow the suspension system to work effectively, improving overall performance and driving dynamics.

The Sian Roadster stands at a height of 1158 mm (45.6 inches), giving it a very low and aerodynamic profile. This low height reduces air resistance, improving speed and fuel efficiency while enhancing the car's stability at high speeds. It also lowers the center of gravity, which benefits handling and cornering. However, the low profile means entry and exit can be more challenging compared to taller vehicles.

Weighing in at 1645 kg (3626 lbs), the Lamborghini Sian Roadster is relatively lightweight for a hybrid roadster of its power class. This weight is a result of advanced materials and engineering aimed at improving performance and efficiency. The reduced weight helps optimize acceleration and handling, allowing the hybrid powertrain to deliver a seamless mix of electric boost and internal combustion power without compromising agility.

The Sian Roadster stands out among hybrid hypercars due to its unique combination of futuristic hybrid technology and traditional Lamborghini design. With a length of 4979 mm and curb weight of 1645 kg, it is comparable in size to rivals such as the Ferrari SF90 Stradale, yet it offers a distinct aesthetic and driving experience. The Sian’s pioneering hybrid supercapacitor system provides instantaneous power delivery unmatched by many competitors, making it a leader in hybrid performance technology.

Without its mirrors, the Sian Roadster is 2080 mm (81.9 inches) wide, a width that balances aerodynamic efficiency with road presence. This broad stance helps stabilize the car at high speeds, reducing lift and improving control. While wider than conventional sports cars, this width reflects Lamborghini’s focus on combining aerodynamic efficiency with aggressive styling cues that convey power and precision.

The Sian Roadster’s substantial length of 4979 mm (195.9 inches) contributes positively to high-speed stability and gives it a commanding road presence. However, this length can make parking maneuvering challenging, especially in tight urban settings or compact garages. Drivers benefit from assisted parking technologies and should plan for extra space when parking or turning in confined areas due to its extended dimensions.