THERE YOU SIT at the traffic lights, derestriction sign just ahead, and a sinuous B-road snaking beyond - this seems like a pretty good time to be in an Audi S4 Avant. Lights change, foot down, whoomph in the back - although perhaps not quite as hard as you might have expected. It somehow feels that perhaps a couple of the 328 horses under the bonnet have wandered off. Nevertheless, you'll still get up to speed indecently quickly, and the S4 is a reasonably refined companion, road noise excepted.
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