The Lamborghini LP 700-4 Aventador Roadster boasts a 6.5-liter, 691-horsepower V-12 capable of propelling the open-air supercar from 0-60 mph in under three seconds, on the way to a top speed of 217 mph. Unlike the Lamborghini Murcielago Roadster, which used a complicated and ungainly soft top, the...