Thanks everybody for appreciating it...
@frazfa
yes dear 180 is top speed so is in santro which is also 1000 cc .Only in cultus i have seen top speed of 200 km .The top speed mentioned in JOY's brochure is 155 km.. but i think it can go over 160 as happens in santro .. i drove it on Gt road with A/C at 120 km and it run very smooth ... i did not speed it much as i did not want to abuse the new engine 
