Pagani Zonda F

2005 Zonda F (C12 F)

The Zonda C12 F debuted at the 2005 Geneva Motor Show. It is the most extensive reengineering of the Pagani car yet, though it shares much with its predecessors including the 7.3 L V12. Power is increased to 602 PS (443 kW; 594 hp) with a special clubsport model producing 650 PS (480 kW; 640 hp). The company promises a 3.5 second sprint to 62 mph (100 km/h), a top speed over 215 mph (346 km/h). The Zonda F clubsport has a power to weight ratio of 528 bhp/ton(384 W/kg). An Enzo Ferrari, comparatively, has a power to weight ratio of 483 bhp/ton (356 W/kg).
The top speed can be further tweaked by adjusting the aerodynamic settings. 215 mph (346 km/h) is the car's top speed on the setting for the best handling which provides the most down force but also has the highest drag coefficient. If the aerodynamic settings were adjusted the top speed would be a bit higher. This also seems to be the reason that when EVO Magazine attempted the Pagani Zonda S's top speed on the Autobahn, that they were only able to get the car to 197 mph (317 km/h), as opposed to its claimed top speed of 220 mph (350 km/h). It would make sense that if the car was set up for maximum downforce then its top speed would drop to around 200 mph (320 km/h). Company representatives at Pagani's factory backed up this claim. However, the EVO article claimed that aerodynamic parts, specifically ones which created drag were in fact removed during the run, bringing Pagani's claims into question.
The Zonda F Clubsport lapped the Nürburgring, in 7 minutes 27.82 seconds, beating the Porsche Carrera GT. It was surpassed by the 2009 Corvette ZR1 on 7 June 2008, with a time of 7 minutes 26.4 seconds. With Marc Basseng at the wheel the Zonda F CS has set a new time around the Nürburgring, lapping the 12.9 miles (21 km) Nordschleife in 7:24.7 now only surpassed by the Maserati MC12 which set a time of 7:24.3, the Dodge Viper SRT-10 ACR with a time of 7:22.1. and the Radical SR8LM with a record time of 6:48.
Production of the Zonda F will be limited to 25 cars, not US compatible. The next model (codenamed C9), due to be unveiled in 2009, will be fully EPA/DOT compatible.
The Zonda F, named after Formula One driver Juan Manuel Fangio, comes with an extra head light and different fog lights at the sides, new bodywork (revised front end, new rear spoiler, more aerodynamic vents all around) that improves the cars aerodynamics and different side mirrors. Further enhancements over the 'S' centre around optional carbon/ceramic brakes developed in conjunction with Brembo, magnesium wheels, inconel titanium exhaust system, hydroformedaluminum intake plenum and a redesigned 'Z preg' weave in the crash structure to improve rigidity and reduce weight.

Zonda Roadster F

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 5 kilograms (11 lb). Production of the Roadster F is suggested at 25 units. The Zonda Roadster F also has 50 more horsepower than the coupe version, making the roadster faster.
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 kilograms (77 lb) of reinforcement. Pagani instead uses racing car 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, 1,230 kilograms (2,712 lb).
The Zonda Roadster F was tested by Top Gear's James May and achieved a lap time around their test track of 1:17.8 beating the Bugatti Veyron 16.4 also tested during the same episode, but lost in a quarter mile drag race against theBugatti Veyron 16.4 by nearly 2.5 seconds.