Lamborghini Sian supercapacitor explained

Lamborghini turns its hand to hybrid power, and uses its forces for good

Lamborghini Sian Spercapactior

Not surprisingly, Lamborghini’s foray into electrification is unconventional in the extreme. Rather than following its rivals down the battery-electric path, the Italian supercar maker’s first hybrid uses a supercapacitor to store electrical energy which is fed to a small electric motor.

Compared to even the most advanced batteries, supercapacitors both charge and release their energy much faster and can tolerate many more charge and discharge cycles without degradation.

For the Sian, a 25kW motor is built into the gearbox to provide either an e-boost to the 577kW 6.5-litre V12, or power the hyper coupe purely on electricity during low-speed manoeuvring.

Lamborghini Sian

With such fast charging, the Sian doesn’t need to be plugged in to top up its supercapacitor. Instead, the full charge is achieved through regenerative braking each time the brake pedal is pressed, which also improves fuel consumption by recovering energy that would otherwise be wasted by conventional brakes.

The other key advantage to the capacitor approach is weight. With rapid power flow rates, the system can be much smaller while still delivering the punch of a large battery. As a result, the capacitor and motor add just 34kg to the overall weight, but top up the total power output to 602kW.

Done in a flash

The flash of a camera is a very visual representation of a conventional capacitor discharging a large amount of power in just milliseconds. The Sian, however, is equipped with a supercapacitor, which multiplies the thump sent to its motor for serious performance.

Lamborghini Sian

Flat out

The downside to capacitors of any size is poor prolonged power storage, as the electricity contained within dissipates relatively quickly over time. Park your Sian for a week and there’ll be no pure EV power left when you come back.

Told you so

With low-voltage supercapacitor technology already in operation in the Aventador, and a partnership with MIT to design a supercapacitor system for the pure electric Terzo Millennio concept, it was only a matter of time before Lamborghini rolled out a full-fat production capacitor vehicle. Expect more to come.


How are you finding our new site design? Tell us in the comments below or send us your thoughts at


Subscribe to Wheels magazine

Subscribe to Wheels Magazine and save up to 44%
Get your monthly fix of news, reviews and stories on the greatest cars and minds in the automotive world.



We recommend


Nissan Juke rally concept celebrates 240Z's East African rally victory 50th anniversary

Nissan Juke Rally Tribute digital concept revealed as 240Z East Africa homage

If we didn’t know a new Z is right around the corner, this SUV-based tribute to a sports car icon might be a bit worrying. Instead, it’s an awesome homage

7 hours ago
Mike Stevens
Please enable JavaScript to view the comments powered by Disqus.