Under the hood of the 2006 Ford Focus is a 2.0-liter four-cylinder engine making 130 horsepower. Our test car transferred this power to the front wheels through a four-speed automatic transmission. Gearing makes the Focus feel lively in traffic, but when passing on the highway the Focus makes lots of noise but little extra forward motion. The car can, however, cruise all day at 80 mph with little effort, and the automatic does a great job of holding third gear for hill climbing. Fuel economy with this powertrain was disappointing at just 23.3 mpg, substantially less than its 26/32 EPA estimate. The main thing to love about the engine is that in some regions of the country it's rated as a Partial Zero Emission Vehicle (PZEV), which means it burns as cleanly as a hybrid.