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Introduced in 2021, the BMW M5 CS is the most powerful production car from the German manufacturer. Rated at 627 horsepower, the 4.4-liter V-8 trumps the larger V-10 and V-12 engines from the past and enables the M5 CS to outgun all M-badged Bimmers produced thus far. But is the S63 under the sedan’s hood the most powerful engine BMW has ever built? Not quite. That honor goes to the S70, an engine from the 1990s. But there’s a catch, as this specific engine wasn’t used in a BMW. Find out more about that in our top 10 most powerful BMW engines of all time list below.
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