as stated before, less cyls=
lower manufacturing cost
Less energy Loss (friction and surface area for head dissipation)
Better torque for the same capacity (e.g my dad's 2.0 4pot Avensis has more torque than my 6pot 320i)
better/easier packaging (less engine bay space required)
however, gimme a small capacity v6/straight 6 or v8 over a 4pot any day- the noise is just sublime!
building a car as a saleable tool= fewest cyls possible to meet design critera
building it as an engaging, dynamic and emotive "desirable" object, then more cyls and better sounds please!
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My Blog on cars- Fu'Gutty Cars
http://fuguttycars.wordpress.com/
US MPG for my Renault Clio 182
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