MAN B&W Engine Type Designation

We always hear this statement or tell others that:
"Oh i have worked on 10S80ME engine on my last ship" or "my last ship was propelled by SULZER RTA 68-7-flex engine"
Now do we really understand what the above statement means or what are we talking about?
We have worked on different types of MAN and Sulzer engines in the past and will continue to do so. We have come across so many engine designations and types in our past, but how many of us know exactly what these designations mean?

MAN B&W Engine Type Designation

10S90ME-C9-GI-EGRBP

10 - Number of cylinders
S - Stroke/bore ratio {G 'Green' ultra long stroke
S Super long stroke
L Long stroke
K Short stroke}

90 - Diameter of piston in cm

M - Engine programme series

E - Engine concept{ME-C Compact engine
ME-B Exhaust valve controlled by camshaft}

C9 - Mark number

GI - Fuel injection concept{blank Fuel oil only
GI Gas injection methane
GIE Gas injection ethane
LGIM Liquid gas injection methanol
LGIP Liquid gas injection LPG}

EGRBP-Tier III technology {blank Tier II only
EGRBP EGR with bypass matching
EGRTC EGR with TC cut-out matching HPSCR High-pressure SCR
LPSCR Low-pressure SCR}

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