Automobili Lamborghini presents the new Lamborghini Aventador LP 700-4 Roadster: the most exciting series production Lamborghini ever built and the new benchmark in the world of open-top luxury super sports cars. On the heels of the successful coupe introduced in Summer 2011, and with over 1,300 units already delivered to customers, the House of the Raging Bull is now offering the convertible version of the Aventador, a vehicle that perfectly balances the ultimate driving experience with the ultimate in sports car sophistication. The new Lamborghini Aventador LP 700-4 Roadster can immediately be recognized by the unique profile of its upper area, which extends along newly designed geometric lines from the removable roof to the engine hood.
The Lamborghini Aventador LP 700–4 is a two-door, two-seater sports car publicly unveiled by Lamborghini at the Geneva Motor Show on 28 February 2011, five months after its initial unveiling in Sant’Agata Bolognese. Internally codenamed LB834, the Aventador was designed to replace the ten-year-old Murciélago as the new flagship model in the Lamborghini lineup starting in 2011. Soon after the Aventador unveiling, Lamborghini announced that it had already sold over 12 months of the production vehicles, with deliveries starting in the second half of 2011. The suggested retail price is €255,000 in Europe, GB£201,900 in the UK and US$379,700 in the U.S.
On 31 July 2011, the Aventador was reviewed on motoring show Top Gear, receiving mixed reviews from Richard Hammond. Although impressed with the performance and handling, Hammond expressed dismay at the lack of temperament and danger associated with driving previous Lamborghini supercars.  The Aventador recorded the third fastest time around the Top Gear track with a time of 1.16.5, beating the Bugatti Veyron Super Sport, among others. However in series 18 of the program, Jeremy Clarkson said it was the best alternative to the Ferrari 458 Italia and is £200000 worth of dreams. 
The Lamborghini Aventador makes an appearance on video games such as Gran Turismo 5 via confirmed downloadable content, Forza Motorsport 4 via the November Speed Pack DLC, Car Town, Forza Horizon, Need for Speed: The Run, and was heavily featured in Need for Speed: Most Wanted (2012). It also served as the cover art of the PlayStation Vita game Asphalt: Injection and iOS game Asphalt 7: Heat.
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.