Introduced in 2005, the Ferrari Superamerica was a convertible version of the 575M Maranello; it featured an electrochromic glass panel roof which rotated 180° at the rear to lie flat over the boot taking 60 seconds for operation. Patented Revocromico the roof incorporates a carbon-fiber structure that is hinged on the single axis with a luggage compartment lid, allowing access to the latter even with an open roof. The roof was manufactured in collaboration with French glass specialist Saint Gobain. With the roof open, the rear window, apart from holding the third stoplight, also acts as a wind deflector. This roof design was previously used on a 2000 Alfa Romeo Vola, designed by Leonardo Fioravanti. The Superamerica used the higher-output tune of the V12 engine used on the 575M, codenamed the F133 G, rated at 540 PS (397 kW; 533 hp) and Ferrari marketed it as the world's fastest convertible car, with a top speed of 320 km/h (199 mph). The GTC handling package was optional.^[