Known though it has been for decades by its Quattro all-wheel drive system, Audi didn't launch its first crossover until the Q7 in 2005. Ever since, the German automaker has been steadily expanding its crossover lineup. But while most vehicles seem to get bigger and bigger with every successive generation of models, Audi's high-riders keep getting smaller.

Following on the launch of the Q5 in 2008, Audi has just started production of the Q3. But it's not about to stop there. A Q6 is rumored to be in the mix to take on the likes of the BMW X6, but rumors are also surfacing that Audi could opt to build an even smaller crossover than the Q3.

Potentially labeled Q1, the diminutive softroader could follow one of three approaches, taking its platform either from the A1 hatchback, the modular architecture planned for the next-generation A3, or the upcoming A2. Whatever the basis, sources suggest the Q1 could be rushed to market in as little as two years from now, hitting dealers as early as 2013.

Rumors are also circling of a more performance-oriented Q4, that could (like the Porsche Cajun) offer a three-door body-style, with flared fenders and such. One way or another, Audi's crossover range isn't showing any signs of slowing down.

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