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Sky takes Mazda powertrains to the next level

Mazda's next-generation of powertrains, called Sky, will feature a variety of new technologies that company engineers say improve fuel efficiency by 20 percent. The Sky engines--Sky-G for the gasoline version, Sky-D for diesel--coupled with a Sky-Drive automatic transmission or a six-speed manual, were offered for test drives during a technology day in Berlin. The Sky-G engine we drove was a 2.0-liter inline-four that made 160 hp and 155 lb-ft of torque.

GM transplants Chevrolet Volt technology into the Cadillac ELR hybrid

One of the headliners of the 2009 Detroit auto show, the Cadillac Converj concept, will become production reality. Cadillac confirmed some details on Wednesday afternoon and said that the coupe will be called the ELR. It will use a T-shaped lithium-ion battery pack, and a generator kicks on to extend range, similar to the Chevrolet Volt.

Tokyo Motor Show 2013: the best production cars

The Tokyo Motor Show is Japan's premier motor show and is well known for its display of weird and wonderful concept cars - many of which, frustratingly, will never see full production. So, for car fans with half an eye on real-world reality, help is at hand. We've put together a gallery of our favourite production cars of the Tokyo Motor Show 2013.