excessive fuel consumption

Hello, the other day, I decided to go to the workshop to make a compression test to the car, a 1994 Renault Laguna 2000.I F3R B565C gasoline, since the car was rambling as atres cylinders and an exorbitant fuel consumption, about 25l alos 100 km. After making said test the cylinder, it has no compression and the remaining three are well. Compression make the car consume so much, and if it is like knowing if they are the segments, or they are the valves. The car does not consume oil or make smoke or blue or anything. The car has 200,000 km.
What consumption does this car have if it were fine in urban, on the highway? Thank you very much atodos, I wait for your answers.

Hello ... my question is: if not smoke from any kind where excessive gasoline can be in the oil?