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2021 BMW M3, M4 review: Prototype test – CarAdvice
Just as we did with the 4 Series before it was unveiled, we've hit the track in BMW's new hero M4 coupe – and its M3 sedan twin – before a proper road test later this year.
Just as we did with the 4 Series before it was unveiled, we’ve hit the track in BMW’s new hero M4 coupe and its M3 sedan twin before a proper road test later this year.
The good news is the new sixt…
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