Power comes from the incredible L539 6.5-liter V-12 engine, upgraded here to produce 740 horsepower. The extra power—the Aventador packs 691 horses—was found by enlarging the air intakes, allowing for higher revs, and modifying the existing exhaust system. Power is channeled to all four wheels through the seven-speed, single-clutch automated ISR transmission, an ultra-quick unit that shifts with all the subtlety of a club strike when you select the track-ready "Corsa" setting. Top speed rises to a lofty 221 mph, four more than the Aventador LP700-4, and—not coincidentally, we think—the McLaren P1.