Audi’s RS engines have never failed to deliver aurally. They don’t even require you to wring them out — just turn them on, and your ears and body cavities tingle with the sound and resonance. The Audi RS5 will continue that tradition admirably, if this video of it running The ‘Ring is any indication. Based on that note, unless they’ve tweaked the exhaust from the 4.2-liter V8, it sounds to us like there’s a certain V10 lurking in that engine bay.
Source: Autoblog, The German Car TV