Sián Roadster

The first open-top hybrid Lamborghini super sports car to feature a supercapacitor, the Sián Roadster roars with electrified intensity, resonating with the inimitable V12 sound from the most powerful Lamborghini engine to date. Limited to only 19 examples, the Sián Roadster advances hybrid technology with the world’s first use of a supercapacitor in a materials-science application unique to the industry.

OVERVIEW

The first open-top hybrid Lamborghini super sports car to feature a supercapacitor, the Sián Roadster roars with electrified intensity, resonating with the inimitable V12 sound from the most powerful Lamborghini engine to date. Limited to only 19 examples, the Sián Roadster advances hybrid technology with the world’s first use of a supercapacitor in a materials-science application unique to the industry.

EXTERIOR

The futuristic Lamborghini design features long, sculptured contours and distinctive aero wings to define a commanding and powerful profile, a shape that is pure and purposeful. The very low front, enhanced by an integrated carbon fiber splitter and the iconic Lamborghini Y-shaped headlights, optimizes aerodynamic efficiency, for a sensation perceptible from within the open-air cabin.

INTERIOR

Lamborghini elevates the design of its hybrid cars with sophisticated aluminum details painted in Oro Electrum (gold), the color Lamborghini has chosen to identify it’s hybrid cars. The purposeful interior of the Sián Roadster embraces this elegant effect with Y-shaped features and distinctive hexagonal accents harkening back to the first Lamborghini Miura. Every touch reflects meticulous attention to detail, from the driver controls to the newly designed air vents produced by special 3D printing, a technology that allows a customer’s initials to be incorporated into the vent design.

TECHNICAL SPECIFICATIONS

• DISPLACEMENT 6,498 cm³ (396.5 cu in)
• MAX. POWER 819 CV (602 kW) @ 8,500 rpm
• MAX. SPEED >350 km/h (217 mph)
• ACCELERATION 0-100 KM/H (0-62 MPH)
• NUMBER OF CYLINDERS 12
• TRANSMISSION Electronically controlled all-wheel drive system (Haldex gen. IV) with rear mechanical self-locking differential
• Fuel Economy Combined* Vehicle not type-approved in this country

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Technical Specifications

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Technical Specifications

CONSUMPTION

IC ENGINE

• engine V12, 60°, MPI (Multi Point Injection)
• displacement 6,498 cm³ (396.5 cu in)
• bore x stroke 95 mm x 76.4 mm (3.74 x 3.01 in)
• compression ratio 11.8 ± 0.2
• max. power 785 CV (577 kW) @ 8,500 rpm
• max. torque 720 Nm @ 6,750 rpm
• lubrification system Dry sump
• emission class Euro 6 – LEV 3

ELECTRIC MOTOR

• Supercapacitor tension supply 48V
• Supercapacitor power density 2,400 W/kg
• max operating current 600A
• max. power 34 CV
• max. torque 35 Nm
• e-machine weight + Supercapacitor 34 kg

ENGINE

TRANSMISSION

• transmission Electronically controlled all-wheel drive system (Haldex gen. IV) with rear mechanical self-locking differential
• gearbox ISR (Independent Shifting Rods) gearbox with 7 speeds, shifting characteristic depending on drive select mode, electric motor works during the shifting and as boost

PERFORMANCE

• max. speed >350 km/h (217 mph)
• acceleration 0-100 km/h (0-62 mph)
• Acceleration 0-200 km/h (0-124 MPH)
• braking 100-0 km/h (62-0 mph)

BODY AND CHASSIS

• chassis Carbon fiber monocoque with aluminum front and rear frames
• body Full carbon fiber body
• top roof Electrochromic glass fixed on the monocoque roof
• mirrors Electrically operated, heated and foldable
• aerodynamics New active areo electrically powered

WHEELS

• front rims 9”J X 20” H2
• rear rims 13”JX21” H2
• front tires P Zero Corsa 255/30 ZR 20 92Y
• rear tires P Zero Corsa 355/25 ZR 21 107Y

STEERING AND SUSPENSION

• control system Electronic Stability Control (integrated ABS and TCS)
• suspensions Push rod magneto rheologic active front and rear suspension with horizontal dampers and springs
• steering type / steering system LDS (Lamborghini Dynamic Steering) with variable steering ratio

BRAKING SYSTEM

• brakes Dual hydraulic circuit brake system with vacuum brake booster; front and rear CCB (6-cylinder brake calipers, 4-cylinder brake calipers)

SAFETY

• airbags Front dual stage driver airbag and front adaptive passenger airbag; seats with side “head-thorax” airbags; knee airbags in selected markets

DIMENSION

• length 4,979 mm
• width (excluding mirrors) 2,080 mm
• width (including mirrors) 2,265 mm
• height 1,158 mm
• wheelbase 2,700 mm
• DRY WEIGHT 1,645 kg
• weight distribution 43 / 57

FEATURE HIGHLIGHTS

MOTOR/IC ENGINE

The Sián Roadster sports Lamborghini’s innovative supercapacitor application: a world-first technology storing ten times the power of a lithium-ion battery.

Vehicle not type-approved in this country

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Feature Highlights

FEATURE HIGHLIGHTS

SMART MATERIALS

Active cooling vanes on the rear are made with unique materials-science technology patented by Lamborghini.

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Feature Highlights

FEATURE HIGHLIGHTS

4-WHEEL STEERING

The Sián Roadster offers a unique combination of the active steering system (Lamborghini Dynamic Steering) and the rear-steering system (Lamborghini Rear-wheel Steering), delivering maximum dynamic performance.

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Feature Highlights

FEATURE HIGHLIGHTS

4-WHEEL DRIVE

The 4-wheel-drive system on the Sián Roadster is optimized to work specifically with the new active systems, in particular rear-wheel steering.

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Feature Highlights

FEATURE HIGHLIGHTS

4 ACTIVE SUSPENSION

The Sián Roadster features magneto-rheological front and rear shock absorbers with pushrod systems, which constantly modify suspension behavior according to the road conditions and the selected driving mode.

Expand all
Feature Highlights

MOTOR/IC ENGINE

The Sián Roadster sports Lamborghini’s innovative supercapacitor application: a world-first technology storing ten times the power of a lithium-ion battery. 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 supercapacitor and 34 CV e-motor weighs only 34 kg, thus delivering a remarkable weight-to-power ratio of 1.0 kg/CV. The indomitable V12 engine of the Sián Roadster incorporates titanium intake valves and is uprated to 785 CV (577 kW) at 8,500 rpm, thus becoming the most powerful Lamborghini engine ever made, delivering a total of 819 CV (602 kW) and reaching a top speed of over 350 km/h.

Vehicle not type-approved in this country

SMART MATERIALS

Active cooling vanes on the rear are made with 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.

4-WHEEL STEERING

The Sián Roadster offers a unique combination of the active steering system (Lamborghini Dynamic Steering) and the rear-steering system (Lamborghini Rear-wheel Steering), delivering maximum dynamic performance. The LDS system adapts to the speed and the selected driving mode, moving between direct steering and a more indirect mode, while the LRS system manages the rear-steering axle through two electromechanical actuators. This system improves agility at low speeds, while providing optimum vehicle control and greater stability at highway speeds.

4-WHEEL DRIVE

The 4-wheel-drive system on the Sián Roadster is optimized to work specifically with the new active systems, in particular rear-wheel steering. This system is able to maximize performance and driving pleasure in poor grip situations. Here, torque distribution between the front and rear axles is varied dynamically in real time depending on the selected driving mode and the driving conditions. Additionally, the Sián Roadster makes use of a brand-new Pirelli P Zero Corsa tire design, specifically developed to further enhance the vehicle’s active driver-assistance systems.

4 ACTIVE SUSPENSION

The Sián Roadster features magneto-rheological front and rear shock absorbers with pushrod systems, which constantly modify suspension behavior according to the road conditions and the selected driving mode. In addition to compensating for roll and undesired movements of the vehicle body, the system is specifically designed to work in concert with the rear-wheel steering system, thus ensuring an ideal response under all conditions.

Lamborghini Sian review

Outrageous looks, huge performance, a surreal pricetag – and all sold out

The Aventador is hardly a car for shrinking violets, so it’s no surprise that Lamborghini has opted to turn this special based on the same architecture up to 11 – and that’s on a scale that goes to 5.

The Sián FKP 37 sits on the same floorpan and is powered by the same glorious naturally aspirated engine, but it gets bespoke bodywork and pioneering technology in the form of a supercapacitor hybrid system. Despite a €2.5 million (£2.2m) pre-tax price tag, the entire 63-car run of coupé has already been sold, as have the 19 roadsters that will follow it.

The Sián sounds magnificent: louder and rowdier than even the Aventador SVJ, but with an exhaust note that truly harmonises within the last few hundred revs before the cut-off

The 48V electric element may win attention, but the 6.5-litre V12 remains the headline act. This is basically the same engine that powers the mighty Aventador SVJ but with a slight boost in output, taking peak power to a claimed 774bhp at 8500rpm – the highest yet for a road-going Lamborghini.

The supercapacitor plays only a supporting role to this, but it’s an important one. It can add up to 33bhp at up to 81mph through an electric motor integrated into the gearbox.

Unlike its plug-in hybrid rival, the Ferrari SF90 Stradale, the Sián can’t run under electric power alone, but its supercapacitor is much more powerful than a conventional battery would be. Lamborghini says that the bulkhead-mounted power pack and motor collectively add just 34kg of weight, with the system’s 600A peak flow rates allowing it to add instant effort.

We’re told the Sián’s in-gear times are up to 10% quicker than those of the Aventador SVJ. An equally important role is using electric-motor torque to fill some of the gaps in the automated single-clutch transmission’s changes.

The design of the Sián’s is jaw-slackening, looking like a virtual rendering come to life. The combination of width and wedginess pays obvious homage to Marcello Gandini’s Countach of 1974, as do details such as the louvred engine cover. The front features Y-shaped daytime running lights inspired by those of the 2017 Terzo Millennio concept.

The rear is dominated by the huge rear track and size of the vast, 335-profile P-Zero tyres, these overhanging the aerodynamic elements positioned above them and flanking an enormous diffuser (a powered rear wing hides away at lower speeds). Six hexagonal tailight elements seem to hang, surrounded by space, and above them the rear deck incorporates active cooling flaps that open automatically.

Lamborghini’s plans for a drive in one of the more scenic parts of Italy were stymied by pandemic-related restrictions, so my drive came in the considerably less exotic environment of Bedfordshire’s Millbrook Proving Ground on a rainy afternoon.

Not that the Sián needs a glamourous background to feel special. Its cabin shares most of the Aventador’s architecture but has plusher materials and a new, portrait-orientated central touchscreen. It also shares its lesser sister’s shortage of head room, with the limited space allowed by the fixed buckets beneath the Alcantara headlining making me glad not to be wearing a helmet.

Starting the engine turns the Sián immediately angry. This isn’t one of those new-age hybrid supercars that’s capable of silent running, rather one that lives the celebrate the savagery of its rev-happy V12.

The Sián starts rolling less snappily than the Aventador does, its electric motor helping smooth out clutch engagement, but once it’s moving, the cabin is always noisy and filled with buzzy vibrations.

Performance is predictably huge. Slight electrical help can be detected in higher gears and at lower revs, but giving the V12 its head removes any sense of the motor assisting.