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You asked me to stop by and look at your note. Good thing you did, as I mostly look at 700/900 posts.
I remember years ago finding a voltage drop to the pumps on a 240 like yours that was driving everyone crazy. I traced it to a real crappy fuse setup that allowed a lot of resistance. Low voltage = low pump speed = low volume. This will not show up as low pressure until the engine's demand exceeds the pump's ability to deliver.
The final fix was to cut the wires to the main pump fuse (under the block) and replace it with an external holder and a glass fuse.
Run the car for a while and feel the main pump fuse for heat. Anything more than slightly warm and you've found a voltage drop (resistance).
I've never owned a 200 car so I cannot tell you which fuse or what years had this problem, but I am sure that someone more knowledgeable on 200s will chime right in behind me and fill in the blanks.
Your slightly high compression readings are either from an inaccurate gauge (was it made in China?) or some carbon deposits. If you don't have to feed it super premium to keep it from pinging its guts out, then this is not a problem at all.
Other places to look for power loss (not quite sure why you think you have a fuel delivery problem from what you said):
Late valve timing - check that the camshaft sprocket is DIRECTLY in line with the cover mark while the crankshaft is stopped at TDC. Ignition timing has no bearing on valve timing so one can be right with the other wrong.
Incorrect timing procedure - your car might be one of those running manifold vacuum to the distributor advance. In that case the hose MUST be removed from the diaphragm to check/set ignition timing or it WILL be wrong.
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