The Audi RS4 has come of age and matured into a stunning model in its latest semi-estate or Avant version, writes Robin Roberts.RS4 production has been on and off since it was launched in 1999 and it is currently the fourth generation of the most driver-focused model in the immensely popular and wide Audi A4 range.Audi looked very hard at the sector where it wanted to push the RS4 and … [Read more...]