You have to sit back and applaud a car like the Audi RS6 Avant. As we've noted with amazement countless times, it's a station wagon capable of outgunning supercars. In Europe that sort of thing flies, and while it still won't be making the transatlantic voyage (even though we're sure that, with a set of wings attached, it could get here on its own), even back in the old world not everyone is keen on the estate body-style. Which is why Audi is preparing a conventional four-door sedan version of the RS6, which our photographers spied all but completely undisguised out on the street a little over a month ago. Reports now indicate that the twin-turbo V10 super-sedan will be unveiled at the upcoming Paris Motor Show this coming October. We can expect the sedan version to carry the same mechanicals as its wagon counterpart, however certain visual updates are expected to be shown on the top-of-the-line RS6 sedan before they trickle down to the entire A6 range.