The infinite-headroom Sian is here and it’s already sold out

Lamborghini will assemble just 19 Sian Roadsters. They’re all sold at the time of writing, by the way, so all that’s left for us to do is drool at the photo gallery while squeezing in one or two details about the Roadster’s character. Here’s the essential info on Lamborghini’s new V-12, yet-unpriced marvel.

  • 2020 Lamborghini Sián Roadster
  • Year:
    2020
  • Make:
  • Model:
  • Engine:
    V12
  • Horsepower @ RPM:
    819
  • Torque @ RPM:
    531
  • Displacement:
    6.5 L
  • 0-60 time:
    2.9 sec.
  • Top Speed:
    217 mph
  • Price:
  • car segment:
  • Purpose:
  • body style:

Lamborghini Sian Roadster - Powertrain

The very heart and soul of the Sian Roadster is the same powertrain present inside the coupe.

Expressed in numbers, that’s 819 horsepower coming from twinning a 6.5-liter, high-revving naturally-aspirated V-12 (785 horsepower at 8,500 rpm, 720 Newton-meters/531 pound-feet of torque) with a 34-horsepower e-motor mounted inside the gearbox.

Just like in the Sian coupe, the electric motor not only complements the ICE, but also works as the main actor during reversing and parking.

2020 Lamborghini Sián Roadster Exterior
- image 918683

Performance-wise, the Sian Roadster has a top speed of over 350 kph (217 mph), while the 0-100 kph (62 mph) shuttle takes under 2.9 seconds. Just like in the coupe’s case, that’s very well in line with the name Sian (since it translates as ‘flash’ or ‘lightning’ in the Bolognese dialect).

Naturally, Lamborghini’s supercapacitor technology is present, too, with the hardware bit tucked in between the cockpit and the engine, so it doesn’t mess with the weight distribution.

2020 Lamborghini Sián Roadster Exterior
- image 918681

As you might recall, this solution is deemed as three times more powerful than a battery of the same weight and three times lighter than a similar-capacity battery pack - the e-motor plus the 48-volt supercapacitor system weigh just 34 kilos (75 pounds). The braking system is of the regenerative ilk and it’s been entirely developed in-house by Lamborghini.

Lamborghini Sian Roadster specifications
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 hp @ 8,500 rpm
Max torque 720 Nm @ 6,750 rpm + 40 Nm electric
Electric motor
Operating tension 48V
Max operating current 600A
Max Power 34 HP
Max Torque 38 Nm
Combined power 819 hp
Weight to power ratio <1,98 kg/CV
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
Top Speed >350 km/h (217 mph)
0 to 62 mph <2,8 s

Lamborghini Sian Roadster - Design

There’s not much to pick on in the design department, but we’re told the Sian Roadster got a couple of elements that set it apart from its coupe peer.

The debut color, for example, is called Blu Uranus and it’s been selected by Lamborghini’s Centro Stile and the Ad Personam department for the way it evokes ‘the blue of the sky and the green of the fields’ associated with freedom.

left right

The hue you see on the wheels is called Oro Electrum (electrum being a naturally-occurring alloy of gold and silver). Inside, it’s complemented by Blu Glauco and white detailing, as well as more Oro Electrum deco bits and bobs made of aluminum. Indeed, the Sian Roadster’s cabin is an exquisite place to sit in and enjoy the blue sky as you carve through the hills of Tuscany - provided you’re one of the lucky 19 one-percenters that bought the car.

2020 Lamborghini Sián Roadster Exterior
- image 918686

Speaking of carving, the Sian Roadster’s profile directs air through the front splitter and through the front bonnet, as well as through the side air intakes, and then over the rear spoiler in a clever way that keeps its aero abilities intact compared to the coupe.

Tudor Rus
Assistant Content Manager - Automotive Expert - tudor@topspeed.com
Tudor’s first encounter with cars took place when he was only a child. Back then, his father brought home a Trabant 601 Kombi and a few years later, a Wartburg 353. At that time, he was too young to know how they worked and way too young to drive them, but he could see one thing – each of them had a different ethos and their own unique personality. As time went on, he started seeing that in other cars as well, and his love for the automobile was born.  Read More
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