BMW M50 vs M52 vs M52TU vs M54

Today we going to do some comparison btw BMW M50, M52, M52TU and M54. In this video we going to do some weight measurements btw the most common 6-six cylinder petrol blocks and cylinder heads made by BMW. Lets see what BMW have improved or worsen during the M5X era, in their engines.
Cylinder Blocks:
M50 - M50B25 Cast Iron
M52 - M52B28 Single Vanos
M52TU - M52B28TU
M54 - M54B30
Cylinder Heads:
M52 - M52B28 Single Vanos
M52TU - M52B28TU
M54 - M54B30
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