Zonda should go as fast as F3000 car, and it should even be faster at speeds higher than cca 160 km/h. I am actually suprised you don't know that. Here are the official specifications:
F3000 CAR SPECIFICATION:
Same size as F1 cars and 6 speed gearbox allowed
CHASSIS: 2002 Lola B2/50
ENGINE: Zytec 3 litre V8, 470 BHP
PREFORMANCE: 0-100 kph 3.1 second; 290 kph top speed
TYRES: AVON, same size as F1
DIMEMSION: same as F1
TRANSMISSION: 6 speed sequential Lola/Hewland
Zonda C 12 S
Engine M120 AMG, 60 Degree, V12
Horsepower 413.9 kw / 555 bhp @ 5900 rpm
0 - 60 mph 3.6 seconds
Transmission 6-Speed Manual
Topspeed 354.1 kph / 220.0 mph
Ferrari GTO is a 42 years old car and you expect it to handle like some new supercar? Hm... interesting.