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Message: <blockquote data-quote="B33mEr" data-source="post: 342637" data-attributes="member: 13609">From wikipedia <a href="http://en.wikipedia.org/wiki/BMW_N52" target="_blank">http://en.wikipedia.org/wiki/BMW_N52</a>"The BMW N52 is BMW's latest straight-6 engine, which debuted in 2004 on the BMW E63 630Ci. Its crankcase is made entirely of magnesium and aluminum, a first in the world of engine construction. BMW used Alusil aluminum cylinder sleeves, which offer high heat conductivity, and cast them into a lightweight magnesium block [1], creating one of the lightest production engines of its size class in the world at 161 kg (354 lb).It includes BMW's second generation Valvetronic system and Double-VANOS for fuel-efficiency (12% fuel savings over the previous generation BMW M54 engine - and increases performance. Producing 63 kW (85.5 hp) per liter of displacement, it has the lowest weight per horsepower of any six cylinder engine (1.24 hp per kilogram with the latest version). It is the world’s lightest six-cylinder engine.It was awarded as one of Ward's 10 Best Engines of the Year in 2006 and 2007. Technologically it is even more advanced than the new N54B30 bi-turbo, which is based on an older M54B30 design and lacks several improvements that BMW has made for this engine."Hehehe you're right bro .. let me re-phase <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /> the use of mag alloy helps the N52 to achieve a high power to weight ratio :top: Also it's the other way around It's a magnesium block with aluminum cylinder sleeves <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /></blockquote>

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