2021 Lamborghini Sian

To Be OFFERED AT AUCTION at RM Sothebys The Monterey Auction event, 13 - 15 August 2026.
$2,200,000 - $2,600,000 USD

• One of just 63 coupes produced worldwide
• Equipped with $237,000 in bespoke features, including interior and exterior carbon fiber packages and Ad Personam gradated Rosso Efesto paint
• Nero Ade leather interior with Rosso Alala Alcantara inserts and contrast stitching
• Showing just 308 miles at cataloguing time
• Part of the Petersen Automotive Museums previous exhibit Hypercars: The Allure of the Extreme
• Accompanied by window sticker copy, factory manuals, charging cable, cover, and air compressor

The Si n is a significant inflection point for Lamborghini. As the companys first hybrid hypercar, it is an acknowledgement that even the most uncompromising performance cars will incorporate some form of alternative propulsion going forward. The name means lightning in the Emilian dialect of Bologna, while the alphanumeric designations indicate the initials and birth year of Volkswagen Group Chairman Ferdinand Pich, who oversaw the German automakers acquisition of Lamborghini in 1998.

The Si n shares its chassis and 6.5-liter V-12 with the Aventador. A new titanium intake manifold elevates engine output to 785 horsepower the highest of any Lamborghini engine at the time of the Si ns unveiling in 2019. More intriguing is the innovative hybrid system that delivers an additional 34 horsepower. The entire electric system weighs 75 pounds, helping achieve a power-to-weight ratio better than the Aventadors. Rather than using a heavy battery pack like most hybrids, Lamborghini incorporated a supercapacitor in the bulkhead to power a 48-volt electric motor built into the cars seven-speed automated manual gearbox. It is the first application of a supercapacitor in a production hybrid, Lamborghini claims three times more powerful than a battery of the same weight and three times lighter than a battery producing the same power.

Besides weight, the key advantage of a supercapacitor over batteries is its ability to discharge full power instantaneously, making the Si n the fastest-accelerating Lamborghini ever at the time of its launch, achieving zero to 62 mph in less than 2.8 seconds. An evolution of similar technology used for the start-stop system in the Aventador, the supercapacitor also has the benefit of eliminating lag between upshifts during acceleration and recharging instantaneously through regenerative braking.

The Si n reinterprets the Lamborghini Countachs iconic wedge profile, incorporating elements both familiar, like the periscopio channel in the roof, and new, such as the Y-shaped lighting first seen on the Terzo Millennio electric hypercar. Lamborghini applied advancements in material science for cooling vanes at the rear that react to thermal shifts, rather than relying on motors or electronics, to open automatically.

Lamborghini limited production of the Si n FKP 37 coupe to just 63 examples, a number that represents the year the company was founded. By the time of its debut at the 2019 Frankfurt International Motor Show in Germany, all were spoken for, each one customized by its owner directly through Lamborghinis Centro Stile, ensuring that no two are alike.

Delivered new through official Lamborghini dealership Holman Motorcars St. Louis in Missouri, this Si n coupe has been lavishly configured with a dramatic Rosso Efesto exterior that fades into exposed gloss carbon fiber a fully bespoke specification executed through Lamborghinis exclusive Ad Personam program. The custom-specified exposed carbon fiber interior features Nero Ade leather with Rosso Alala Alcantara inserts and contrast stitching, a color scheme that coordinates beautifully with the exterior and red-accented wheels. The optional exterior and interior Carbon Packages and Ad Personam gradated paint finish added nearly $237,000 to the price of the Si n when new.

Now offered with just 308 miles showing at the time of cataloguing, this Si n carries the distinction of having been part of the Petersen Automotive Museum exhibition Hypercars: The Allure of the Extreme in Los Angeles, which ran from December 2021 to May 2023. It is quite a worthy inclusion, as the Si n represents one of the most ambitious and visually arresting performance cars of the modern era, at the very threshold of Lamborghinis naturally aspirated past and increasingly electrified future.
To view this car and others currently consigned to this auction, please visit the RM website at rmsothebys.com/auctions/mo26/.