I don't understand it. 
  
How is it that there are 2 liter inline sixes, and then on the other hand, there are 3.0L+ with the same amount of cylinders? 
  
  
what, exactly does displacement measure? 
  
I'm not even sure what i'm asking here. 
 
  
i'm sick of talking about things that I don't fully understand. 
  
thanks