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BMW Z4 M Sport Package released

BMW is to debut the M Sport Package for the Z4 at the Detroit Auto Show Back in September we brought you some pictures of what at first glance appeared to be a BMW Z4M, despite BMW making it clear that they are not going to build an M car this time round. But it actually turned out to be a Z4 with M Sport Package zapping round the Nurburgring looking, to all intents and purposes, like a new hot Z4. Almost three months on BMW has finally got round to revealing the M Sport Package for the Z4 which will – just like the BMW Z4 sDrive35is we reported on yesterday – debut at the Detroit Motor Show in  January 2010.

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.

MPG or performance: It's a trade with turbos

Some automakers say turbochargers offer high fuel economy and quick acceleration, the best of both worlds. Well, yes and no. Turbocharged vehicles allow automakers to keep power output high while they downsize engines for better fuel economy.