Hi,
It is supposed to be the V6 version I guess, but I do not have other info.
As someone said on the page of the "Taxi 3" 406, it has leather interior: http://www.imcdb.org/vehicle_2461-Peugeot-406-1999.html
which may indicate a high-spec version.

First i must sey hello. I am from slovenia, if someone know where it is.
I'm sorry for my bad english.
So i have to ask you guys something: i need to know more or less about that p406 form the movie taxi. I wanna know what engine was in that car, was it tuned? Thanks for informations.