Audi Sport has revealed the S6, S6 Avant and S7 Sportback, ahead of a European market launch later in the year.
UPDATE, 11/4/19: Audi Australia has confirmed we'll be getting the TFSI versions of the S6 and S7 Down Under, rather than the TDI models that will be available in Europe. See bottom of article for details
Interestingly, the company has decided to draw upon turbo-diesel power in all three vehicles. However, the USA, Asia and Middle East will get a petrol version.