so... what's the difference between a 911 turbo, GT1, GT2, and GT3?

[andylawcc]

so the GT3 has a N/A flat-six 3.6L 360hp
GT2 is twin-turbo-ed, and 456 hp (?)
plain 911 is 320hp, while the Turbo is 415hp. [i just check carpoint.com, which answered half of my questions]
so what's a GT1? and other than horsepower difference, are there anything noticable difference among those variations?

 

[CocaCola5]

The GT1 is both the racer(LeMans) and the road going replica(basically the same car), both has the same name. The racer has a 3.2 quad cam flat-six and 640hp and the road model has iirc the same except with 550hp.

 

[goodoptics]

I believe a stock 911 turbo can hit 60 mph from a deadstop in 3.9 sec. I could be wrong though.

 

[matsuhisa]

doesn't really matter to me... i want any one of them.