Quattro ULTRA or TORSEN? Audi A4 Allroad vs Audi A5 Sportback - 4x4 test on rollers
How to discern Quattro Ultra from Torsen in a roller test? (video with subtitles).
Audi A4 Allroad 2.0 TFSI Quattro Ultra (2018)
vs
Audi A5 Sportback 2.0 TFSI Quattro (2017)