Ive got an AX GTi, they are damn quick as standard for a 1.4 8 valve. I did the following mods to mine:
VTR 1.6 Short cylinder block (VTi Engine)
GTi Gas flowed, ported & polished cylinder head x
Kent 285 degree cam
S1 Rallye Inlet Manifold & Throttle Body
Green air filter
BTB 4-1 branch Exhaust manifold
Custom straight through S/S centre pipe (de-cat)
Mongoose S/S de-cat back system
FSE power boost valve
Vernier pulley
Lightened & Balanced flywheel
VTR Injectors
RR Setup
Dastek
Would have been awesome if it was running right, still got work to do on it. At the mo i have a VTS with a shagged head on it
I agree with the others..... if you want a quick nippy 1.4 then go for the AX GTi, there awesome and sound wicked with the S1 inlet mani on (baby throttle bodies)