Abit more spec....

2.2 20v 5 cylinder turbo with external wastegate
6 speed box
4x4
0-60: 6 secs
150mph

Cosworth performance without the reliabilty issues, security risks or high insurance!
You can tune these cars to 6-700bhp.
Spend 1500 quid and it will be better than RS2 spec running 350bhp on the standard bottom end, no need for rebuilds or steal rods etc.
The transmission will handle that sort of power too as it is 100% bombproof.

Massive tuning potential and scope for peanuts

Rarity factor: only 320 S2 Avants ever made!
I maintain a register for them on s2forum.com and so far have found 94 cars, only 3 of which are in the same colour as mine.
VERY rare colour

Mileage isnt an issue, plenty of them are running big power over at well over 200k