Cadillac ATS-V vs BMW M4 - Head to Head Review

Let's find out if the Cadillac ATS-V, a relative newcomer to the segment, can dethrone the gold standard luxury sports coupe/sedan, the BMW M3/M4!
See how I rank the ATS-V and M4 in the Zygrene Performance Index (ZPI):
docs.google.co...
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