https://www.cnet.com/roadshow/news/audi-2020-s6-s7-debut/

Avants make everything better. Don't @ me.

The mild hybrid system allows the car's stop-start system to kick in around 14 miles per hour, further saving fuel. The electric turbocharger, on the other hand, helps out the traditional exhaust-driven turbocharger by spinning up quickly to eliminate turbo lag and improve responsiveness.