The Lamborghini Aventador has finally been spotted on US soil. What's even better is that there were actually two of these supercars seen together: one black and one white.

The two Aventadors were being driven at Lamborghini Giro 2011 which takes place from June 11-15, 2011. Giro brings together like-minded Lamborghini->ke44owners from the U.S., Canada, Mexico, and Brazil to enjoy the rugged scenery and spectacular driving of Arizona and Nevada. The four-night drive program takes place in Phoenix, Sedona, and Las Vegas, with outstanding luxury at each of the scheduled hotel accommodations.

The Lamborghini Aventador->ke3624is powered by a new 6.5-liter V12 engine with an AWD layout that produces 700 HP at 8,250 rpm and 509 lb-ft at 5,500 rpm. This engine will be able to get from 0-60 mph in just 2.9 seconds while blasting off a top speed of 217 mph. Sales will begin in late summer 2011 at a price of $379,700.

.