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Lamborghini Aventador spy photos: The Roadster in the Snow!

Lamborghini is set to crack the top off the Aventador supercar, and the V12-powered speed demon spyder has been captured in cold-weather testing in Sweden. Obviously, this Dancing Bull is adept in the snow, as these shots show the all-wheel-drive system conquering the wet and wild of the far north. It's expected to run a 6.5-liter, 691-hp V12 paired with a seven-speed automated-manual gearbox.

Chrysler to build smaller version of Pentastar V6

The Chrysler Group plans to produce a smaller version of its 3.6-liter Pentastar V6 engine, likely at a plant in suburban Detroit, according to a union official and a source familiar with the project. The new 3.2-liter Pentastar V6 is set to debut in the replacement for the Jeep Liberty, the union official said. Chrysler-Fiat CEO Sergio Marchionne has said the Liberty successor will be introduced in January at the 2013 Detroit auto show.

Mazda pushes fuel economy, plans a new engine by 2011

Mazda's push to increase fuel economy across its model line will include a new range of gasoline engines and may involve the introduction of diesel and idle-stop technology in the United States. Mazda is aiming to increase fuel economy across its global lineup by 30 percent by 2015. The first stage of that transformation will include the introduction of a more fuel-efficient four-cylinder powertrain in 2011.