. Pagani Zonda Roadster F C12S 7.3 $667,321:

The Pagani Zonda is a supercar produced by Pagani in Italy. It debuted in 1999 and continues through the present, with production proceeding at roughly 25 cars per year. As of December, 2005, 60 Zondas had been built. It is a mid-engined 2-seat coupe and convertible. Construction is mainly of carbon fiber. The Zonda Roadster F debuted at the 2006 Geneva show. It is similar to the coupe, but with a removable carbon fibre roof and canvas side curtains weighing just 11 lb (5 kg). Production of the Roadster F is suggested at 25 units. The Roadster F is able to maintain chassis rigidity without any gain in curb weight by eschewing conventional thinking by not strengthening the sills – a process which would have needed more than 35 kg of reinforcement. Pagani instead uses racecar thinking, materials and construction techniques, strengthening the firewall structure of the chassis tub together with billet alloy braces that connect the points where the roof rails would have joined. The windscreen is also strengthened for safety reasons. These techniques enable the Roadster to have virtually the same weight as the coupe – 1230 kg (2712 lb).