Want to buy an Audi V8, what do you think? Good or bad this car?

Hello, now after some BMW’s and Mercedes I want to get an Audi V8 this winter as a winter vehicle. I have no clue about this model. Which engine? 3.6 liters or yet the 4.2 liters? What about the funny brakes? What is to be paid attention to when buying? What problems or what are the typical weaknesses of this vehicle? Automatic or manual transmission? Need your help Thank you 🙂