Lamborghini unveils the limited edition Sian Roadster

Automobili Lamborghini has presented the Lamborghini Sian Roadster - a limited edition, open-top hybrid super sports car engineered around Lamborghini's iconic V12 engine with unique hybrid technologies and delivering unsurpassed Lamborghini and hybrid performance.

The roofless design of the Sian Roadster puts an exclusive group of drivers in one of the most spectacular cockpits ever - always open to the sky, resonating with the inimitable V12 sound from the most powerful Lamborghini engine to date, and experiencing extraordinary performance while revelling in the Sian Roadster's role in Lamborghini's route to future hybridisation.

The Sian Roadster makes its debut in Blu Uranus, especially selected by Lamborghini's Centro Stile, which together with the Ad Personam department works with every Sian client to entirely personalise the colour and finish of their Roadster.

Encapsulating the blue of the sky and the green of the fields, evoking the freedom and driving elation delivered by the open top Sian Roadster's performance, the car is finished with Oro Electrum wheels - the colour chosen by Lamborghini to signify electrification.

The complementary interior is an elegant combination of white with Blu Glauco detailing and aluminium elements in Oro Electrum. New-design air vents produced via 3D printing allows customisation with a client's initials.

The pure and uncluttered design is a clear statement of the car's optimised aerodynamic efficiency and technological prowess - airflow is directed through the front splitters and through the front bonnet, through the side air intakes and outlets and over the rear spoiler, with no loss of aerodynamic efficiency from the roadster's roofless design.

Active cooling vanes on the rear use unique materials-science technology patented by Lamborghini. Operation of the vanes is triggered by the reaction of smart-material elements to the temperature generated by the exhaust system, causing them to rotate and providing an elegant and lightweight cooling solution.

The extreme and strong rear of the car incorporates Lamborghini's evocative hexagon design, including six hexagonal taillights inspired by the Countach. The rear wing is integrated within the profile and extends out only during the driving to enhance the performance.

The Sian Roadster sports Lamborghini's innovative super capacitor application - a world-first technology storing ten times the power of a lithium-ion battery. Located in the bulkhead between cockpit and engine it ensures perfect weight distribution.

Three times more powerful than a battery of the same weight and three times lighter than a battery producing the same power, the electric system with the super capacitor and a 48V e-motor weighs only 34kg, thus it delivers a remarkable weight-to-power ratio of 1.0kg/bhp. Symmetric power flow ensures the same efficiency in both charging and discharging cycles - the most lightweight and efficient hybrid solution.

This advanced technology combines with the V12 engine, which incorporates titanium intake valves and is uprated to 774bhp at 8,500rpm. Combined with the additional 34bhp from the hybrid system, the Sian Roadster delivers a total of 807bhp and reaches a top speed of over 350km/h.

The Lamborghini Sian Roadster incorporates a highly sophisticated regenerative braking system, especially developed by Lamborghini. The symmetric behaviour of the super capacitor, which contrary to normal lithium-ion batteries can be charged and discharged with the same
power, fully charges the Sian's energy storage system every time the vehicle brakes.

The energy stored is an instantly-available power boost, allowing the driver to draw immediately on increased torque when accelerating away, up to 130km/h when the e-motor automatically disconnects, improving the elasticity manoeuvres and making it more than 10% faster than a car without this system. The innovative system also delivers instant acceleration in low gears, with improved traction force provided by the combination of V12 engine and hybrid system. The Sian Roadster accelerates from zero to 100km/h in less than 2.9 seconds.