Now that everyone’s home, in self-quarantine (at least, we hope everyone is), Audi is starting a new “Tech Talk” series of press releases. These are designed to give you some interesting information on the technology and engineering behind a lot of the brand’s new models. To kick things off, we get to take a deep dive into the 2.9 liter twin-turbocharged V6 engine from the Audi S6 and S7.
While the 2.9 liter V6 used in the S6 and S7 isn’t exactly new, as it first launched on the Audi RS5, it does get a few new tricks up its sleeve for Audi S6 and S7-duty.
Thanks to a 48-volt mild-hybrid technology and an EPC (Electric-Powered Compressor), the engine almost completely eliminates turbo-lag by creating boost at zero rpm, electrically. The entire EPC, including all of its components, only weighs 22 lbs (10 kg) and can add boost in just 250 milliseconds.
That additional boost fills in the gap low in the rev-range where the exhaust-driven traditional turbochargers don’t make boost. This creates a smoother transition into full-boost while also creating a smoother, more linear powerband.
In total, the Audi S6 and S7 both make 444 hp and 443 lb-ft of torque, which is the same as the RS4 and RS5. However, thanks to their 48-volt mild-hybrid setup, the S6 and S7 will make that power in a smoother fashion while also reducing fuel consumption just a bit. Though, that fuel consumption might be mitigated by their extra weight.
While we obviously miss the charismatic, incredible sounding V8 of the previous-gen S6 and S7, this new engine is very impressive. We can’t wait to drive both.
Audi is going to be putting more of these Tech Talks out in the coming weeks, while all Audi employees are working from home and events are cancelled. Hopefully, everyone stays home, stays safe and stays healthy. These little Tech Talks will help pass the time.