they dont have even separate service centerfor them, no spare available in dealers
and poor quality of plastics ,
poor engine tuning & gear ratio
maybe you meant quarter mile tests but you should keep in mind such figures give nothing about actual quality of a car other than showing gleaming figures in paper.
(eg .. feel the difference between ddis & multijet , because Suzuki tuned it well according to Indian condition )
Multijets are more refined ,under stricter tolerance and give competitive fuel efficiency with much heavier and tougher kerb .
Feature wise I have not seen any other car in this segment which offers as much features as fiat car would deliver for given price.