Lamborghini Aventador LP 700–4 Convertible Roadster

Six months after unveiling the Aventador, plans for a roadster version were leaked by the U.S. EPA after it included the model on a data sheet on its website. Lamborghini officially unveiled the Aventador J to the world at the 2012 Geneva Motor Show. The roofless and windowless concept car uses the same V12 engine as the standard Aventador, producing 700 hp through a lightweight seven-speed automated transmission. The car has also been stripped of its air conditioning and radio units to save further weight, allowing it to weigh in at only 3,472 pounds (1,575 kg). The car presented at the Geneva show was the only unit to be produced, and was sold for US$2.8 million.
The J designation was thought to have come from Appendix J in the FIA rulebook that describes the technical specifications of race cars. However during an interview with designer Filippo Perini, it was revealed that the 'J' actually stands for Jota, in reference to 1970's one off Lamborghini Miura Jota which also conformed the FIA's Appendix J regulations.
• Mansory Carbonado
In July 2012 Mansory unveiled the Carbonado, a modified version of the Aventador. It features the same 6.5 litre V12 engine as the normal Aventador, but it has been tweaked to produce 754 PS (555 kW; 744 bhp) @ 8,300 rpm, a 54 PS (40 kW; 53 bhp) increase on the standard model. The torque has also been improved—the engine now produces 750 N·m (550 lb·ft) @ 6,000 rpm, a 60 N·m (44 lb·ft) advantage. Because of the extra power, the performance figures are slightly higher: 0–60 takes 2.8 seconds and the top speed is on the far side of 220 mph (350 km/h). The exterior of the vehicle is covered in black carbon fibre, which is why Mansory call it "the Black Diamond of the streets". Six units will be made.