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BMW Concept 4-series Coupe (2012) first photos

BMW is overhauling the 3-series Coupe - it'll be replaced in 2013 by the new 4-series Coupe and Convertible, previewed in this remarkably production-ready concept car. Munich reserves the 'Concept' moniker for its show cars which are in reality showroom ready. So strip away the sexed-up exhausts, 20in wheels and other trinkets and what you're looking at here is the new 2013 BMW 4-series.

Porsche announces new Weissach design center and wind tunnel

Porsche is to invest around €150m into its Weissach development facility, including a new design center. The plans also include an electronics integration department and a state-of-the art, on-site wind tunnel, which is hoped will allow the company to realize an holistic approach to efficient design, with a strong focus on aerodynamics. When we spoke with head of Porsche design, Michael Mauer, at this year's Paris motor show, he also alluded to the fact that the Volkswagen Group's – and, more specifically, Walter de'Silva's – recent influence on the German manufacturer was shifting its attitudes: "The Volkswagen Group has a very good understanding of how much freedom a brand needs to keep its characteristics and with [Walter] as 'conductor', I feel a lot of support with design issues within the company," explained Mauer.

Mazda Kazamai preview

As we reported in June, Mazda has now confirmed it will unveil a compact crossover vehicle concept at the Moscow International Automobile Salon on 26 August. Called the Kazamai, which means "swirling crosswinds" in Japanese, the new vehicle is the sixth concept to employ Mazda's evolving 'Nagare' design language. The car's lines, inspired by crosswinds in nature, are claimed to evoke visual lightness, while its aerodynamic proportions accentuated by its bold front wheelarches and sleek roof line gives the design an emotional appeal.