Ford Zetec Engine - Sigma

The advanced Zetec-SE (sometimes badged as Zetec-S) was developed in collaboration of Yamaha and Mazda, under the Sigma codename. It ranges in size from 1.25 L (1249 cc) to 1.7 L (1679 cc). It is very different from the Zeta engine - the intake and exhaust are even on opposite sides. It was the first engine to use a plastic intake manifold.

This engine is sold under the Sigma name in some regions, while Mazda uses the MZI name. It is also sold as a crate engine by Ford Power Products as the ZSG.

From 2002 on, Ford started to badge their engines as Duratec. The 1.7 L version was dropped when the production of the Puma ended. Now the 1.6 L is also available with variable valve timing, known by Ford as Ti-VCT (Twin Independent Variable Camshaft Timing).

• 1.25-Litre-Duratec-Engine in a 2009 Ford Fiesta

• 1.7-Litre-Zetec-S-Engine in a Ford Puma

• 1.6-Litre-Duratec-Engine with TI-VCT in a 2012 Ford Focus