Mild-Hybrid Lambo Speedster Breaks Cover

Lamborghini SpA has taken the wraps off its Sian hypercar, which features a 48-volt mild-hybrid architecture and supercapacitor, ahead of the model’s public unveiling at next week’s Frankfurt auto show.

The Sian, which means flash or lightning in Italy’s Bolognese dialect, is Lamborghini’s first electrified vehicle. Production of the $3.6 million car will be limited to 63 units to commemorate the exotic supercar firm’s founding in 1963.

Power will come from a 6.5-liter V-12 and small electric motor that generate a combined 819 hp—the most ever for a Lambo. The combination propels the vehicle from zero to 62 mph in under 2.8 seconds on its way to a top speed in excess of the Aventador SVJ’s 217 mph rating.

Titanium intake valves help increase the naturally aspirated V-12 output to 875 hp from 759 hp in the Aventador. The remaining power comes from the 48-volt electric motor, which is integrated into the car’s 7-speed automatic transmission.

The electric motor can power the vehicle on its own during low-speed reversing and parking maneuvers. Lamborghini describes the setup as an industry first for a mild-hybrid system.

The electric motor also enables smoother and faster acceleration, according to the carmaker. Low-speed acceleration is said to be 10% quicker with the hybrid system.

The supercapacitor is used in place of a lithium-ion battery to save weight and boost output. Lamborghini says the system weighs one-third that of a battery with the same capacity. The motor and supercapacitor weigh a combined 77 lbs.

The supercapacitor is mounted ahead of the V-12 to enhance weight distribution in the mid-engine layout. A regenerative braking system, developed in-house, recharges the supercapacitor.