The Atlantean melampus class BB's have a speed of 26 knots, the Vengeance class BC's 31 knots and the Memnons 28 knots. All other Atlantean BB's hover around the 22 knot range.
I can't see the Renown's trying to match the Memnon or Vengeance class in armor while 30 knots would be sufficient to outrun the Melampus class by a reasonable margin.
Britain is an unlikely nation for Canada to match, ditto for the U.S. Nordish and Japanese ships also don't exceed 27 knots exept fot the Nordish Oden class.