If you're asking about the best Alfa Romeo model with rear-wheel drive, that can depend on various factors such as personal preference, specific features, performance, and the year of manufacture. Some of the popular rear-wheel-drive Alfa Romeo models include the Alfa Romeo Giulia and the Alfa Romeo 4C.

The Alfa Romeo Giulia, particularly the Quadrifoglio version, is often praised for its performance and handling. The Alfa Romeo 4C, on the other hand, is a lightweight sports car known for its agility and unique design.

Please provide more specific details if you're interested in a certain aspect or feature, so I can give a more tailored response.