Have a look at this.
At the moment I´m testing some prototypes of struts from a german manufacturer .(Different damping and force)
These are the latest ones.
880Nm F2 with a 0.5mm bore dynamic damping.
Opening speed has nothing to do with the force they put on the door.
About a Kilo at 2 degrees should be enough to even open the door at -5 C or less.
Slow without stressing the rubber bumpers in the hinge
You can´t handle 1000Nm without damping on doors without windows.
The 880Nm with damping even open fine at 25 degrees without windows.
BTW: They also tested the original struts after a 2 year run.
They lost 15% of their original 690Nm.
So 700Nm would be the lower limit, not considering loss over time.
The problem with these struts is, that they do not get lubricated enough since they are horizontally operated.
Renault hadn´t thought of that! (Or they just didn´t care)
The ones I´m testing have a double seal to enable horizontally operation with minimal loss of pressure over time.