Audi's new S4 will soon be available to order, but the compact exec hasn't reached its performance peak yet. Our spies have again captured the next RS4 out and about in disguise, and it's expected to launch some time next year.
Although previous spies have shown an S4 with some very subtle tweaks, this camouflaged prototype sports the tell-tale twin oval exhaust pipes that are now found across all RS models. Larger air intakes at the front and a lower ride height also give the game away.
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