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Lamborghini reveals 819-hp Sian with supercapacitor hybrid tech

The most powerful Lamborghini ever can hit 62 mph in under 2.8 seconds.

Lamborghini has revealed the Sián, a limited-edition hybrid that takes its name from the Bolognese word for flash or lightning.

The car pairs a naturally aspirated V12 with a supercapacitor and electric motor, producing a combined total of 819 horsepower. Drivers can expect to hit 62 mph in under 2.8 seconds and top 217 mph.

The Sián is the company's most powerful model ever and boasts the best power-to-weight ratio of its V12 lineup. Integrating a supercapacitor is credited with helping achieve the latter spec, avoiding the heft of a traditional lithium-ion battery pack.

"With the Sián we are defining our route to innovation and we are setting new rules in new technologies, instead of just following existing solutions," says Lamborghini CTO Maurizio Reggiani. "The result is the Lamborghini Sián, which includes the world-first application of a supercapacitor for hybridization and new materials technology."

The electric motor is incorporated into the gearbox and provides a modest 34 horsepower. It is claimed to be the first time a low-voltage hybrid motor has been directly connected to the wheels, enabling low-speed reversing and parking maneuvers to be performed under electric power alone.

Only 63 examples will be built -- honoring the company's founding year -- and all have been sold. Pricing has not been officially confirmed, though rumors point to a number around $3.6 million.

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