Reason why manufacturer detunes in India is to take care of the oil drain period,air filter cleaning, for example Vista and Swift pack more punch than Punto but they are serviced at 5-10K kms,fiat has kept he load on engine to minimal where in it can work fine even with clogged air filter as turbo doesn't induce high boost and FIAT thinks semi synthetic oil will last 15 K Kms with current state of tune. This also could be a condition put by TAT management to reduce the number FIAT cars coming to their service centers. Toyota is playing even super safe with their engines,already they have got the name as many of Innnova are ruuning fine after 4 lack kms. I am told VW is playing a lot with the maps to adjust to the Indian conditions , as maps are updated every 3-6 months!! a tuner told me after some time it will be difficult to see Two Vento's having same performance or consistency in FE.