ROUEN, France – Fiat Automobiles SpA’s strategy for meeting Europe’s 2014 Euro 6 rules for a 56% reduction in oxides-of-nitrogen emissions is the opposite of PSA Peugeot Citroen’s approach. The French auto maker plans to tune its engines for fuel efficiency and use aftertreatment technology to treat the extra NOx, while Fiat intends to reduce NOx at the engine-out phase to a level that doesn’t require aftertreatment. Fiat further is developing its MultiAir valve control already in ...

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