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Audi: Electric bi-turbo engine in the works

Audi electric bi-turbo engine

Audi is developing an electric bi-turbo engine.

Designed to quickly build up charge pressure, the system uses a conventional gas-driven turbocharger and an electrically-driven compressor which features a “small electric motor that can accelerate its turbine to very high speeds in an extremely short time.” It promises to deliver “high levels of torque even at very low revs.”
Detailed specifications haven’t been announced, but Audi is testing the system on a modified 3.0-liter bi-turbo TDI.