2020 Lamborghini Sian Roadster

Hypercar · 6.5L NA V12 Supercapacitor Hybrid · AWD

87/100

AutoVault's overall score, weighted for what a hypercar is actually for — performance, technology, comfort, reliability, safety and value.

Specifications

Engine	6.5L NA V12 Supercapacitor Hybrid
Horsepower	819 hp
Torque	531 lb-ft
0–60 mph	2.9 sec
Top speed	217 mph
Drivetrain	AWD
Seats	2
Combined MPG	14 mpg (12 city / 17 hwy)
Range	234 miles
MSRP	$3,700,000
Body style	Hypercar

The verdict

What's good

Supercapacitor hybrid provides instant torque boost without the weight of a battery pack
Only 19 roadsters built, guaranteeing permanent rarity and rising collector value
Open top with the V12-hybrid powertrain creates an unmatched sensory driving experience
ALA aerodynamics actively manage stability at high speeds without fixed wing drag

What's not

Extremely limited Lamborghini factory service access required for any meaningful work
Supercapacitor system provides minimal EV-only range and no meaningful fuel economy benefit
Roadster roofline adds slight structural compliance compared to the coupe Sian FKP 37
Heat from the naturally aspirated V12 in slow traffic is significant and cabin-felt

The engine

L539

NA V12 + Supercapacitor Hybrid

The last great naturally aspirated Lamborghini V12, screaming to 8,500 rpm with the brand's trademark linear, ferocious top-end. A 48-volt motor fills torque gaps and smooths shifts rather than acting as a primary power source.

The L539 V12 was developed in-house at Sant'Agata Bolognese, debuting in the 2011 Aventador as only the second all-new V12 in Lamborghini's history; the Sián adapts the Aventador SVJ's version with revised intake and ECU.

The Sián was Lamborghini's first electrified production car and the world's first road car to use a supercapacitor instead of a battery for its hybrid system.
In the Sián, the V12 alone makes 774 hp at 8,500 rpm — the highest output ever from this engine family.
The supercapacitor stores three times the power of a same-weight battery and fully recharges under every braking event.
'Sián' means 'flash of lightning' in the Bolognese dialect, fitting its electrified powertrain.

See the rest in AutoVault

The six sub-scores behind the 87 — performance, tech, comfort, reliability, safety and value
Market value today and year-by-year value history
All 2 trims with pricing
Studio photography — exterior, rear and interior
Side-by-side comparison with up to four cars

Open in AutoVault