I been searching for 1/4 times between automatic and 5 speed GT's (Stock). So far to my knowledge:
Automatic:
0-60: 6.8s to 7.2s (I tend to believe 7.2s)
1/4 Mile: 15.37 Best to 15.7 (Set on "D"rive)
Car & Drive had 7.2s 0-60 and 1/4 of 15.7 for the 03' GT Auto.
Ian's time for best 1/4 time was 15.37 factory stock 04'Auto.
Maunal 5-Speed:
Absolutely no infomation lying around I can find. There are topics and forum messages leaving hints that a Manual will beat an auto by 1 car lengths = 0.5 secs difference
So that leaves a very rough estimate of:
0-60: 6.4s - 6.8s
1/4: 14.9s - 15.3s
I can't vouch much for the manual times. I do own a 04' GT 5-speed, but it has an aftermarket exhaust and I have not gone to the tracks yet, sooner or later I will. I have driven an 04' GT Auto and I feel that the auto GT has a better launch than the 5-speed, but the 5-speed would seem to edge out on the 1/4 mile (the gear ratios and shifting plays a major part).
Soooo off to the tracks! (When I get better in launching
).