Thanks for the appreciation brother 
About unichip , well to be honest i usually avoid such high speeds and speeds of over 140
This was just a friendly run after jumma prayers when there was no one the road in phase 8
I drive this car daily so I dont want to take any risks , the engine is new thing in our market , dont really want to risk anything and void the warranty
Thats the only reason I havent installed even racechip so far ( the overall advantage isnt that much though with racechip it helps in acceleration after 140 km/h as I said )
But yes after 140 i was helpless , the other turbo took a lead and gave me a gap of around 2 cars till the end
So I will wait for members like you to try Unichip first on their cars
And will decide later lol
As for the drag / race
A3 1.8 Turbo is really fast , lighter and smaller than 1.5T and will smoke it without any trouble I guess
However 1.5T with Racechip will give it a tough time and might even smoke it
I have asked my friend for a friendly run with your A3 but he is not willing for that
I dont know why
I have seen 1.8 Tfsi A3 accelerating from 0 to 200 and 1.5 Turbo from 0 to 200
In 0 to 100 both are samw if properly launched
After that A3 will take a lead
However with racechip 1.5T will give A3 a really really tough time