As AutoblogGreen points out, Ford will soon be facing tough competition in the compact hybrid CUV segment with the introduction of the Saturn Vue two-mode hybrid. What better time, then, to update the Ford Escape Hybrid and Mercury Mariner Hybrid for 2009? The big news is the addition of a new 2.5L four-cylinder to replace the old 2.3L engine. Not only is the new engine larger, but it also adds variable valve timing on the intake to boost power by 17 up to 170 horsepower. The 2.5L also serves as the new base engine for the standard Escape and Mariner, but uses the Atkinson cycle in the hybrid models. Ford's hybrid CUVs also get a new six-speed automatic (correction: only the gas-powered models get the new six-speed automatic), aerodynamic upgrades and new 16-inch low-rolling resistance tires from Michelin. All of these improvements add up to a one mpg gain in fuel economy (correction: fuel economy remains the same for the hybrid models while power goes up), plus more power and usability. Ford hasn't released official fuel economy numbers for the 2009 Escape Hybrid, but it should maintain the same numbers as before, and likewise for the new Mercury Mariner Hybrid.