Quote:
Originally Posted by MoFo4life44
Yeah but i believe those engines in the 640 and 740 are tuned differently. Just like the N54 powers the 335is but has 320bhp and 370lbtq(with overboast) instead of 300bhp and 300lbtq in the 07-10 335i. I could be wrong though:/
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You're correct. That's why they generate more power. If I recall correctly they have a bigger turbo, but I might be remembering that wrong. They're still N55s.