Our car can beat many a 350z, auto or manual, but we're far from stock. With the TVT250 upgrade you whould hang with a manual and beat an auto if the drivers are equal.

TVT250 Crossfire: 250 HP, 3100 lbs
350z: 308 HP, 3500 lbs

That's about an 18 HP difference in absolute perfect conditions. All driver at that point.