Debuting at next month's Geneva Motor Show is the Pagani Huayra Roadster, a convertible version of the Italian supercar coupe that's surprisingly both lighter and more powerful than its predecessor. Under the hood is a Mercedes-Benz six-liter V12 engine with twin turbos, good for 764 horsepower and 740 lb-ft of torque, enclosed in a titanium and carbon fiber body that weighs in at about 2,822 pounds (that's 176 pounds lighter than the coupe). Additional factors that go into the weight reduction include suspension and wheels made with aluminum alloy, along with a lighter-weight 7-speed automated manual transmission, which replaces the the heavier dual-clutch unit in the coupe. As for the open roof, it can be topped with a carbon fiber and glass panel, or a fabric roof that can be stowed inside the car when not in use. pagani says that it's making just 100 of the Huayra Roadsters, and even with the $2.4 million price tag, all 100 are already spoken for.