The Lamborghini Sián FKP 37 is a mid-engine hybrid sports car produced by the Italian automotive manufacturer Lamborghini. Unveiled online on 3 September 2019, the Sián is the first hybrid production vehicle produced by the brand.

Based on the Lamborghini Aventador, the Sián FKP 37 shares its engine with the SVJ variant of the Aventador, but an electric motor integrated into the gearbox adds another 25 kW to the power output. Other modifications to the engine include the addition of titanium intake valves, a reconfigured ECU and a new exhaust system raising the power output to 785 PS. The total power output is 819 PS, making the Sián the most powerful production Lamborghini. The engine is connected to a 7-speed automated manual transmission and the car employs an electronically controlled all-wheel-drive system with a rear mechanical self-locking differential for improved handling.

The power for the electric motor is stored in a supercapacitor unit instead of conventional lithium-ion batteries. The supercapacitor unit is integrated with the electric motor into the gearbox in order for a better weight distribution. Supercapacitors were chosen due to their ability to provide three times the power of a conventional lithium-ion battery of the same weight. The...