Questions about the Audi 80-please read

Hi, I’m looking for a new (used) car. So far I’ve only driven Mercedes 190 and was actually satisfied. Nevertheless, I’m interested in an Audi 80 B4 because I want something else, preferably an Avant and would like to ask you to give me some basic tips and information. First of all, I don’t know how long the Audi 80 was built, which things were series and which model maintenances were introduced from when? Then I would like to know what kind of model was the Audi 80? I don’t know which 2.0 engine is the better choice, where are the differences that exist, or whether there were even smaller engines than the 2.0? What is the fuel consumption compared to a 90hp and the E-model? Which engine is more robust, etc…? Then I would be interested to know if the Audis are rusty and what do you think an Avant with a 94er Baujah is. r in good condition and not too many kilometers still has to pay? I am happy about every serious answer and info from you, because I know Audi only from hearing. However, I have heard about the B4 mostly good so I wanted to buy it. Maybe you confirm to me that the Audi 80 is a good choice and a real alternative to the Mercedes 190er (W201)? Would I be very pleased about a few answers, so many thanks to all the Time and pleasure. Greetings Dany