Chris Ratcliffe / Bloomberg
Its happened to all of us. Were driving along in Lamborghinis $400,000, 700-horsepower Aventador and find ourselves wishing we could remove not only the roof, but the windshield too. Well, problem solved. Lamborghini unveiled in Geneva the Aventador J. Its mechanically identical to the Aventador you have at home: a 700-horsepower, V12 engine; all-wheel-drive; and automated manual transmission. But the roof, windshield, air conditioning and navigation system have been removed.