I have also ALto 2010 model and the same problem when it was new but now it has completed 14000 KM and running fine, buddy the new car engine is thight and after some milage it gets fine.
One more thing and really true, one time take your car on highway or empty road and drive very harshly on very high RPM dont give your car breath for 25-30 KM, it is also better you give your car to anyone as i gave my car to a friend of mine who drove it very harshly and after that belive me the result was very fine and this advise was given by a mechanic. but plz do it only one time.
the logiccally cause of above desi tips is (the engine parts are tight and by doing this the engine comes at normal side)
I dont know is this tips OK or not but truly speaking I had very good experience.
Also get your car tunned up from good mechanic also get tappet adjusted as well