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A closer look at the 2015 BMW M3 sedan and M4 coupe: Turbocharged performance is gonna cost you

By the time the 2015 BMW M3 sedan and M4 coupe were revealed at the Detroit auto show, we already knew a lot about what to expect from the Roundel's newest generation of high-performance driving machines. It was no secret, for example, that the new M3 sedan and its two-door counterpart, the M4, will be down two cylinders and a few hundred pounds from their predecessors. Now that we've had a chance to get a look at the cars in production trim, here's a closer look at what's under all the aggressively vented fascias, spoilers and M badges.

Nissan debuts Sport Sedan Concept at Detroit auto show

Nissan introduced the Sport Sedan Concept to go along with its IDx twins at the Detroit auto show on Monday. The company says the sleek four-door embodies the next-generation design cues, including the V-Motion front end, floating roof and boomerang headlights. “The Sport Sedan Concept shows a new, highly emotional and energetic design direction that takes Nissan's approach of applying sports-car principles to a sedan to the next level,” said Nissan vice president Shiro Nakamura.

Design Contest: NDA wins 2009 LA Design Challenge

A future where environmentalists and car enthusiasts - not to mention sober-minded adults and thrill-seeking young people - all coexist in harmony just might be possible with Nissan's V2G concept vehicle. The hypothetical design study, which runs on a futuristic grid of electric roadways but can also be customized for 'off grid' joy riding, won the 2009 LA Auto Show Design Challenge for the way it embodies this year's 'Youthmobile 2030' theme. The focus was to create vehicles that would appeal to a generation of young drivers raised on cell phones and social media.