Well the 0-130 of a 245BHP 850R auto is 49 seconds. Thats the only comparison I can give. But the 0-60 is around 10 seconds so I would guess a 0-100 of around 16/17 seconds.
Get to an airfield and time it for us
I had a 2.5 20V for three years and I have to say, , they're not as slow as most think.