The rumormill is floating a big one here. Last night the first Audi R8 V10 5.2 FSI quattro that will arrive in the U.S. went to auction at the Boca Raton Concours d’ Elegance. Although the exact price cannot be confirmed, it sold for around $500,000.

The R8 V10 will be powered by the same 5.2 liter V10 as the Lamborghini Gallardo LP560-4. The engine is rated at 525 hp, which is 105 more than the V8 version but about 27 less than the Gallardo.

The first 2010 Ferrari California for the U.S. market was also auctioned during this event (the first 2009 car was auctioned in September) , and the combined price of the two cars is rumored to be about $1 million. All proceeds of the event will go to support the Boys and Girls Clubs of Broward County, Florida.

We should get final pricing early this week. Once we know more, we’ll pass it along.

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