The EPC comes paired to the 2.9-liter, twin-turbocharged TFSI V6 engine. It consists of an electric motor with a small turbine that helps quickly build turbo boost pressure, sharpening throttle response and reducing any noticeable turbo “lag.”
The EPC takes advantage of the latest-generation 48V mild hybrid electrical architecture, supplying electric energy generated during coasting and recuperation to the vehicles’ 9.6 Ah lithium-ion battery.
From there, the battery provides the electric motor energy to accelerate turbine located downstream of the engine’s turbochargers to quickly increase pressure, aiding engine responsiveness and torque delivery.
The entire EPC system adds just 10kg to the vehicles’ overall weight.
Both the Audi S6 and S7 are rated at a massive 444hp and 600Nm of torque.
More importantly than numbers, however, is drivability, control and agile responsiveness, where the 2.9-liter V6 TFSI with EPC excels.
In internal tests that simulate real-world standing starts, the latest powertrain exhibits response characteristics that rival Audi’s torque-rich, turbocharged 4.0-liter TFSI V8.
Yet, the 2020 S6 and S7 offer 22% greater fuel-efficiency with its downsized V6 engine compared to their predecessors without sacrificing performance.