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Old 01-07-2013, 08:51 AM
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Bönz Bönz is offline
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Location: Michigan
Join Date: Jun 2012
Posts: 641
Mein Auto: 2015 M5
Originally Posted by Itinj6 View Post
Same engine.

Matter of fact, the X6M (and X5M) received that S63 engine first and was later adapted by the M6 (and M5) as a TU version with valvetronic.

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+1 My NJ friend is correct. The TU upgrade also included increased boost and a higher compression ratio if memory serves.

I suspect the same is true for the N63Tu versus the N63. It's the boost and CR that results in the HP increase, not the vlavetronic.
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