Edmunds Inside Line took the two and compared them side-by-side. That means the two cars were tested at the same time and in the same place. The RS4 took first with the IS-F in second place. The RS4 needs only 4.3 seconds to reach 60 and finishes the quarter mile in 12.8 seconds @ 108.5 mph. The IS-F is slightly slower needing 4.8 seconds to get to 60 and 13.2 seconds for the quarter mile @ 109 mph. Click the link for more impressions, pictures and a video.
Read Article