The RS4 came at a time when high revving V8 engines in a normal car were considered unheard of, it also had a type of suspension which was also more advanced than its competitors, so it appeared to be even better than it actually was, when compared to the RS5 the RS4 isn't that special by today's standard and nor was it that special compared to the E92 M3.
The sole reason we aren't thinking of the RS5 as fondly is weight, the RS5 is just far too heavy to be competitive or a true leader of the pack.
The sole reason we aren't thinking of the RS5 as fondly is weight, the RS5 is just far too heavy to be competitive or a true leader of the pack.