In combination with a fuel system in questionable condition. All bets are off. Both the engine and fuel system need cleaning to find out where you are.

No sense in working the fuel system if some more reasonable compression numbers cannot be gained first. Personally I have a good spare 240d engine.

Even if I did not hopefully I could locate one reasonably priced and in good condition and swap it. If the rest of the car was in reasonable condition.

For a lot of past wvo users the parts of the equation overall just did not add up well. So the cars went to the wreckers.

Easy access to good used components at reasonable prices. For these models is regionally dependent . There is close to nothing left in my region. To add further to the problem. Shipping costs have increased steadily. American buyers have much, much cheaper shipping costs to deal with in general.

What is always an unknown is effective compression at higher than cranking RPMs. For example slightly leaky valves will reduce compression.

Once the engine is running they may function better. Just less time to allow their slow leakages to have as great an impact. .In my early days some well worn engines produced more effective power. Then they ever had when in better condition. Actually this was a good indication they were usually getting near their end of serviceability.