What if (theoretically speaking naturally) it would be even wit Z06 or even better than it? I mean, this is the first time when Nissans new FM-platfor will be dealing with the combination of sophisticated AWD system and big load of power.
and then, there is that GT-R Evolution model, that's the hardcore edition with 7-speed paddleshift dsg box and carbonfibre and no backseat etc..
Certainly, there is a possibility that it could outrun the Z06, but the Corvette has had a pretty solid track-record against the Porsche in terms of performance. They're close, and like it has been noted in other threads, it largely depends on the track they are at. Big and long gives way to the Corvette and Porsche, small and technical favor cars like (presumably) the GT-R and F430.
...However, I'm not certain of anything over at Nissan. Sure, they
could surprise us, but I'm uncertain if they
will surprise us...
However, if I may go through a few of your points:
- The FM platform is a bit old-ish, and although I would assume that Nissan has updated it for use in the GT-R, there is still one major problem: Weight. It is what kills the 350Z's performance overall, and with the addition of AWD in the GT-R, it only increases the issues of the given measurement. While I am certain that Nissan will presumably take advantage of lightweight materials, I highly doubt it will be lighter than the 997 Turbo or the Z06 (3494 vs 3192 respectively), given that the 350Z clocks in at 3400lbs to begin with.
- Evolution model aside, most people are likely to go with the 'average' model with the standard 6-speed manual, etc. The addition of a 'hardcore' suspension and a 7-speed DSG-like transmission isn't going to make it an automatic performer, case-in-point the BMW M-series cars. The question is more likely whether or not Nissan decides to make a specifically track-oriented model alike the Z06, and if they can execute it properly for the true sport-oriented setup.
- Finally, price is likely to be the 'Achilles heel' with this car. With presumed base prices stuck around $70K, its already deep into Z06 territory, and with the given Evolution model, thats presumably going into 600 BHP SRT-10 territory. Beyond that, we've still got a long time until the GT-R debuts, calendar year 2008 by most estimates given by Nissan. By then, we may have the 650 BHP Corvette on our hands, Dodge will already be playing with its 600 BHP Viper, Porsche will likely have the GT2 on the streets, and of course there is always the wild-card of the Audi R8...