BMW just announced that they can no longer afford to use aluminum front subframes in their new 5 and 7 Series cars. Thus, they must use heavier traditional steel.
Meanwhile, Audi says that the 2014 S4 and S5 will be massively lighter, and utilize turbo fours. Audi's technical-development chief spills the beans about a kinder, gentler, and faster generation of sporty cars.
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