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Four-door BMW 4-series Gran Coupe revealed in renderings?

Another day, another upcoming car revealed thanks to a leaked patent filing -- and another BMW model variant to memorize: f30post.com has renderings of what looks to be the four-door BMW 4-series Gran Coupe, originally posted at the Chinese-language site autohome.com.cn. No, your eyes do not deceive you, nor are you going crazy. This is, or at least appears to be, a four-door version of the car that BMW created as the dedicated two-door replacement for the now-discontinued 3-series coupe.

Tesla Motors open-sources patents

Since Elon Musk founded Tesla Motors a decade ago, his electric car venture has been a thorn in the traditional auto manufacturers' side. Now, Musk has made another disruptive move by announcing he is scrapping the firm's patents. In a blog post on the Tesla website, he wrote "[the patents] have been removed, in the spirit of the open source movement, for the advancement of electric vehicle technology.

Audi Sport quattro Concept

Celebrating 30 years of the Sport Quattro, Audi has revealed its spiritual successor ahead of its debut at next week's Frankfurt motor show. The broad concept – which measures in at 4,602mm long, 1,964mm wide, 1,386mm high sitting on a wheelbase of 2,784mm – features a number of the same design cues we saw on the 2010 quattro concept, the 1983 Sport quattro and the original Ur-quattro. These include the angular, flat C-pillars and the rectangular headlamps and rear lamps.