With the 2014 Mercedes-Benz E63 AMG now offering as much as 577 horsepower in ‘S-Model’ trim, the 560 horsepower of the BMW M5 is starting to look a little feeble, at least in terms of bragging rights (we doubt most owners would be able to tell the difference). To rectify the issue, BMW is planning an upgrade for the M5, which Car and…

Filed under: Racing News

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