It's the ultimate conundrum of automobile engines: how to add muscle without chugging gas. Ford's solution is EcoBoost, a new family of turbocharged engines that will be available on 90 percent of Ford's lineup by 2013—that's roughly 1.3 million new rides worldwide each year. We recently tested one of the first models out of the gate, the 2010 Lincoln MKT, whose 3.5-liter, twin-turbo V6 cranks out 355 horsepower—more than many larger V8s, including the 4.2-liter in the Audi Q7 SUV. In one test, the engine hustled Lincoln's three-row SUV from 0 to 60 mph in 6.1 seconds, more than a second quicker than the V8 Audi. Yet the Lincoln delivers roughly 25 percent better mileage than the Audi, at an EPA-estimated 16/22 mpg in city and highway.