The Ford Sigma is a small straight-4 automobile engine sold by Ford Motor Company as the "Zetec-SE" (although frequently badged as Zetec-S, not to be confused with the trim level).
The Ford Sigma is a small straight-4 automobile engine sold by Ford Motor Company. First evolution of engines were sold as the "Zetec-SE" (although frequently badged as Zetec-S, not to be confused with the trim level).