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It's only March, but we're already looking what could be one of the biggest track battles of 2021. BMW's all-new M3 takes on the brilliant Alfa Romeo Giulia Quadrifoglio - also mildly updated late in 2020 - around Llandow circuit. Which of these staggering 500bhp-plus super saloons will come out on top? Steve Sutcliffe adjudicates.
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