Up front, this next-generation Zonda F will get an all-new front clip. In back, the rear quarter panels have been re-sculpted to allow for significantly increased airflow. The rear diffuser has also been redesigned...

Spy photographers were shocked when they saw this supercar prototype racing along an American country road with only a few small pieces of camouflage. Although the badges were covered in black tape, there was no doubt they were looking at the 2010 Pagani Zonda F.

Up front, this next-generation Zonda F will get an all-new front clip. In back, the rear quarter panels have been re-sculpted to allow for significantly increased airflow. The rear diffuser has also been redesigned and there is a totally new air scoop that sticks up from the middle of the engine cover.

Inside, we can see the "Zonda F" nameplate above several toggle switches. Other than a new shifter, we don't see any major interior changes. This Pagani has absolutely enormous 335/30/ZR20 Pirelli Pzero Rosso tires in back and 255/35/ZR19 tires in front. Sitting inside the wheels are equally enormous carbon ceramic brake rotors.

What power plant this supercar might be packing is a bit of a mystery. Pagani certainly wants to keep the motor a secret as the clear engine compartment panels were covered with black tape. Judging from the new, larger air intakes on this prototype, whichever motor resides under the cover obviously needs more airflow than the Mercedes AMG 7.3L V8 found in the current Zonda F.

There are rumors of the 5.4L supercharged V8 from the McLaren SLR 722 or perhaps the bi-turbo V12 from the recently debuted Mercedes SL65 AMG Black series providing motivation for the Zonda F. Whatever the motor, it should be good for 600-700hp. The Zonda F should start production sometime in the first half of 2009. If you want one, count on an price tag of at least $650,000.

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New Pagani Zonda F Spy Photos