From: gl4317@yahoo.com   
      
   In article ,   
    rcp27g@gmail.com wrote:   
      
   > It's the nature of the technology that electric traction will always be able   
   > to pack far more power into a given size/weight than a diesel prime mover.   
   > For European type operations, somewhere in the 500 hp/vehicle range is   
   > adequate for 100 mph operation and 750 hp/vehicle is adequate for 125 mph.   
   > That's based on a ~45 Tonne vehicle weight.   
      
      
   The Bombarier Bilevels are 110,000 lb.   
   http://en.wikipedia.org/wiki/Bombardier_BiLevel_Coach   
   and those are non-powered.   
      
   The single level M8 EMU is in the 144,000 lb. range   
   http://en.wikipedia.org/wiki/M8_(railcar)   
      
      
   >  This is entirely within the   
   > capabilities of current off-the-shelf under-floor engines[1].   
      
   > [1] with the caveat that new EU emissions regulations have just come in, and   
   > the existing designs are not yet conformal.   
      
      
   They have switched to what they are calling Tier 4 here.  They take up a   
   bit more space and require a bit more electronics than the older   
   engines.  A few designs require urea injection, but there is an effort   
   to develop engines that don't require this.   
      
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