Lamborghini Sián Roadster Review: Hybrid V12 Power Meets Open-Air Drama
The Lamborghini Sián Roadster occupies a rare position in the world of hypercars. It is not merely an open-top variant of the already groundbreaking Sián FKP 37; rather, it is the fullest expression of Lamborghini’s first hybrid performance platform and an exclusive demonstration of what the Sant’Agata brand can achieve when design freedom, extreme aerodynamics and electrified engineering converge. Limited to only nineteen units worldwide, the Sián Roadster represents a pinnacle moment in Lamborghini’s modern history, marking the transition from pure combustion dominance to a future of electrified performance without sacrificing the visceral, emotional engagement that defines the brand.
Introduced as the open-air complement to Lamborghini’s first hybrid super sports car, the Sián Roadster captures the soul of the coupe and intensifies it with an even more dramatic presence. Its design is an aerodynamic sculpture carved into aggressive planes, sharp surfaces and flowing channels, all of which enhance airflow, cooling and downforce. The roofless architecture amplifies the sensory experience of the iconic V12 engine, allowing drivers to feel not just the force of acceleration but the air pressure, the sound resonance and the mechanical heartbeat of one of the world’s most revered engines.
Gallery: Lamborghini Sián Roadster
As the industry moves toward electrification, Lamborghini has used the Sián Roadster as a bridge between eras. It retains the naturally aspirated 6.5-liter V12, celebrates it, and enhances it with a groundbreaking supercapacitor hybrid system—a world-first application in a road car. This technology provides instantaneous power delivery, feather-light energy storage and seamless integration into the iconic Aventador-derived platform. The Sián Roadster is therefore a technological statement: hybridization, Lamborghini-style, built not for efficiency but for unrelenting performance.
An Exterior Defined by Power and Motion
The Lamborghini Sián Roadster is a study in motion—even when parked. Its exterior design embodies Lamborghini’s philosophy of “form follows emotion,” where every crease, vent and surface is sculpted for aerodynamic and aesthetic impact. The open-roof layout transforms the balance and fluidity of the coupe, creating a profile that evokes speed, drama and ultra-modern elegance.
The front fascia features a low, pointed nose with Y-shaped LED lighting signatures that echo Lamborghini’s modern design language. Deep air intakes feed the V12 engine and the hybrid cooling system, while the bumper’s aerodynamic geometry creates downforce and directs airflow to critical areas. The long, descending hood incorporates deeply carved aerodynamic channels that guide air across the body with meticulous precision.
Along the sides, the Sián Roadster retains the coupe’s dramatic wedge shape, made even more dynamic by the absence of a roof structure. The open-air profile accentuates the car’s scissor doors and highlights the uninterrupted flow of air from the windshield to the rear deck. The side air intakes are sculpted aggressively, drawing cool air into the engine bay and supercapacitor system.
The rear end is among the most distinctive in modern hypercar design. Six hexagonal taillights—a homage to the Lamborghini Countach—sit above an active cooling system featuring heat-sensitive vanes that open automatically to manage thermal expansion. Beneath them lies an enormous diffuser, carefully shaped to provide stability at high speeds, and centrally positioned exhaust outlets that emphasize the raw mechanical core of the car.
The roofless design enhances every aspect of visual drama. Without the coupe’s roofline, the Sián Roadster feels wider, lower and more theatrical. The result is a hypercar that not only channels Lamborghini’s most iconic design themes but also previews the brand’s future sculptural language.
Hybrid Engineering Driven by Performance, Not Efficiency
Lamborghini’s hybrid philosophy begins with an uncompromising goal: performance comes first. The Sián Roadster demonstrates this with a supercapacitor-based hybrid system, a bold departure from traditional lithium-ion battery architectures. A supercapacitor offers significantly higher power density, nearly instantaneous charge/discharge times and exceptional durability, making it ideal for delivering short bursts of power on demand.
The Sián Roadster pairs a 6.5-liter naturally aspirated V12 engine with a 48-volt electric motor integrated into the gearbox. The V12 produces 785 horsepower, making it the most powerful version of Lamborghini’s legendary engine at the time. The electric motor contributes an additional 34 horsepower, bringing total output to an extraordinary 819 horsepower.
Unlike traditional hybrids designed to reduce emissions or maximize fuel efficiency, the Sián Roadster’s electric motor focuses solely on enhancing performance. It fills torque gaps during gearshifts, eliminates the characteristic deceleration during upshifts and instantly boosts acceleration. This creates a seamless surge of power that feels sharper, more responsive and more linear than any purely combustion-powered Lamborghini before it.
The supercapacitor stores three times more power per kilogram than a typical lithium-ion battery. Its lightweight nature ensures the hybrid system adds minimal mass—only around 34 kilograms—preserving the Sián’s razor-sharp handling characteristics.
This system also supports regenerative braking, with energy captured and stored almost instantly, ready to be deployed on the next acceleration event. The hybrid architecture thus becomes an integral part of the Sián Roadster’s personality: electrification as a performance amplifier rather than a constraint.
Performance That Redefines the Hypercar Experience
The combined hybrid-V12 system propels the Sián Roadster from 0 to 100 km/h in approximately 2.9 seconds, placing it firmly among the world’s quickest open-top production hypercars. The electric torque assist eliminates any lag, creating a forceful and unbroken acceleration curve.
Top speed exceeds 350 km/h, and the Sián Roadster achieves this with extraordinary stability thanks to its advanced aerodynamics and improved power delivery. The hybrid fill helps maintain acceleration even during gear changes, ensuring that power is delivered with surgical precision.
The hybrid system also enhances mid-range acceleration. Between 70 and 130 km/h, the electric boost results in dramatically quicker passing capability compared to the Aventador SVJ. This contributes to the Sián Roadster’s identity as a hypercar with explosive, instantaneous response at any speed.
Despite its extreme nature, the hybrid technology enhances drivability in urban environments as well. The electric motor allows smoother low-speed maneuvering, particularly during parking and creeping traffic conditions. This duality—ferocious performance and refined control—embodies Lamborghini’s next chapter.
Chassis Dynamics: Precision Under Extreme Forces
The Sián Roadster shares much of its structural foundation with the Aventador platform, utilizing a carbon-fiber monocoque chassis that combines rigidity with lightweight strength. Every suspension component, steering input and aerodynamic surface is calibrated for extreme performance.
The pushrod-style suspension system delivers a balance between track-level capability and road usability. Adaptive dampers adjust in real time, responding to surface imperfections and dynamic forces to maintain stability. The system ensures that the Sián Roadster remains composed under intense lateral load while still offering acceptable comfort during long-distance driving.
The drivetrain utilizes Lamborghini’s hallmark all-wheel-drive system, ensuring that the immense power is delivered effectively to the road. Torque distribution adjusts instantly based on grip, acceleration demands and steering inputs, giving the Roadster extraordinary stability.
The Sián Roadster’s braking system is among the most advanced Lamborghini has developed. Carbon-ceramic rotors paired with massive multi-piston calipers provide unmatched stopping power, while the regenerative system complements the mechanical brakes by harvesting braking energy efficiently.
The Roadster’s open-top design rigorously tests chassis rigidity, but Lamborghini’s advanced carbon-fiber engineering ensures minimal flex, maintaining precise steering feel and confidence under high performance conditions.
Interior Design: Craftsmanship Meets Futurism
The cabin of the Sián Roadster is as dramatic as its exterior, merging Lamborghini’s signature angular aesthetic with advanced materials and bespoke detailing. The interior blends carbon fiber, Alcantara, premium leather and metallic accents in a cockpit that feels purpose-built for speed.
The seats are lightweight yet supportive, shaped to hold the driver firmly during aggressive cornering while offering a refined seating posture for long-distance journeys. Lamborghini’s customizable Ad Personam program enables owners to specify exclusive materials, color palettes and embroidered insignias, ensuring each Roadster becomes a one-of-one masterpiece.
The center console features a digital interface with touch-sensitive controls and a vertically oriented screen that manages drive modes, vehicle diagnostics and multimedia. The dashboard incorporates Y-shaped design elements echoed throughout the car, reinforcing Lamborghini’s modern design DNA.
Open-air driving transforms the interior into an acoustic theater for the V12’s sonic signature. Without a roof, the cabin becomes deeply connected to the mechanical intensity of the engine and the echoes of the exhaust harmonics, creating an immersive experience no coupe can replicate.
Despite its performance focus, the cabin remains luxurious, with meticulous stitching, hand-finished materials and intuitive ergonomics. The Sián Roadster proves that hypercar performance and refined craftsmanship can coexist inside a vehicle intended for both extreme driving and artistic admiration.
Read: Lamborghini Fenomeno 2026: The Next-Generation Hybrid V12 Hypercar
A Pinnacle of Limited-Edition Exclusivity
With production limited to just nineteen units, the Lamborghini Sián Roadster is rarer than nearly any modern Lamborghini hypercar. Each example is completely customizable, ensuring that no two units are identical. The exclusivity extends beyond mere production numbers; the Roadster embodies technological, aesthetic and cultural significance as Lamborghini’s first open-air hybrid hypercar.
Collectors value the Sián Roadster as a milestone model, representing the moment Lamborghini embraced hybridization with a uniquely emotional interpretation. As electrification becomes dominant in the brand’s future, the Sián Roadster stands as an irreplaceable chapter between eras.
Lamborghini Sián Roadster – Specifications & Technology Chart
| Category | Specification |
| Engine | 6.5-Liter Naturally Aspirated V12 |
| Electric Motor | 48-Volt e-Motor (Gearbox Integrated) |
| Hybrid System | Supercapacitor-Based High-Voltage System |
| Total Power Output | ~819 hp |
| Electric Motor Power | 34 hp |
| Transmission | 7-Speed ISR Automatic |
| 0–100 km/h | ~2.9 seconds |
| Top Speed | 350+ km/h |
| Chassis | Carbon-Fiber Monocoque |
| Drivetrain | All-Wheel Drive |
| Suspension | Pushrod with Adaptive Dampers |
| Brakes | Carbon-Ceramic |
| Aerodynamics | Active Rear Wing, Automated Cooling Vanes |
| Body | Carbon-Fiber Panels |
| Production | Limited to 19 Units |
