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Last year Audi launched the all-new A4 — longer and wider than its predecessor. The new car is no slouch, when powered by either its standard 2.0-litre I4 turbo (211 hp) or optional 3.2-litre V6 (265 hp). But more poke and sizzle can be had by moving up to the just-introduced S4, which made its Canadian debut at the Toronto show. Continue reading