I would recommend Alto. But it is not too much fuel efficient I mean I get 10-11KM/L(without AC) usually local and on Islamabad highway and no traffic I can attain 15-15.8KM/L(Without AC) but still saying Alto is not fuel efficient. Regarding AC Alto VXR has best AC and yes spares of Alto are also cheap and affordable.
Just due to the fuel reasons, my drive was 62KM Daily, I sold my Alto VXR 2007 and now buying Japanese Alto. My monthly expense of fuel was 7000-8000Rs and I am buying JDM and I will be able to save around 3200+/- Rs monthly.
Look out for Alto VXR or Santro. Why not mehran though? Fuel efficient, cheap Spares and also AC. In this budget getting clean Alto would be little hard to find
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