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Vehicles with small, turbocharged engines do not have a significant edge over larger, more traditional powertrains and in some cases the newer models are slower and less fuel-efficient, Consumer Reports said on Tuesday.The influential magazine's findings pose a potential obstacle for automakers, which are relying on this relatively new and expensive technology to meet stringent global fuel economy standards over the next several years.Of the models tested by Consumer Reports, Ford Motor Co's Fusion mid-size sedan was among the worst performers. The Fusion with a 2-liter, turbocharged engine got 22 miles per gallon and accelerated to 60 miles per hour in 7.4 seconds.By contrast, the Honda <7267.T> Accord sedan with a 3.5-liter, six-cylinder engine got 26 miles per gallon and accelerated in 6.3 seconds, according to Consumer Reports."If you look at the V-6s, they're a full second faster and yet they're getting quite a bit better fuel economy too -- and these are large, old-school, tradit...

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