All the wifi routers and such are within yards of each other on average. There isn't one made that goes twice the distance of all others.
Why? Limits imposed on power output by the FCC.
If you need to cover more territory you look to a system of wifi router and WAPs or maybe range extenders.
I live in a big estate. I am going to take an adsl connection. what is the required hardware (wireless and long range). I run Xp pro sp2 on a p4