New Audi RS4 Avant Snagged Testing on the Nurburgring

It looks like Audi has set its mind to fill all the performance niches in the premium category. Following news on the development of a hot S6 based on the latest iteration of Ingolstadt’s executive mid-size model, our man with the long lens has caught a prototype version of the upcoming RS4 Avant testing around the Nurburgring race track.Even though the prototype is a test mule based on the S4