The term "mild hybrid" has never been more appropriate than the 819hp Lamborghini Sian Roadster. As in the coupe, the powertrain consists of a 48-volt electric motor that sends 34 horsepower to the gearbox, while the 785-horsepower twelve-cylinder engine takes care of the rest of the car's acceleration.Electricity comes from a supercapacitor located between the inside of the vehicle and the engine. Compared to conventional lithium-ion batteries, this system can store ten times more energy, has three times the power and weighs only one third (in this case, 34 kg). The Italians price their absolute roadster at 3.3 million euros.
