On Thu, 13 Aug 2009 12:22:13 +0100, "Recliner"
wrote:

The ever-reliable Wiki source says that the 2009 stock is 2.68m wide and
the 1973 stock 2.629, so the 2009 stock is apparently 5cm or 2" wider.
It also says that, "Unlike the 1967 Tube Stock, the trains are built 40
millimetres (1.6 in) wider to take advantage of the Victoria line's
slightly larger than normal loading gauge compared to the other deep
level tube lines."


Ironically, one of the reasons why the Victoria Line tunnel was built
to a larger diameter was to reduce air resistance. ;-)