The M800 is sold mostly in town/rural areas as long as stocks last and then kapische. @BW is right about the emissions stuff too. re: Vento, Indians prefer German brands and the Vento is the new darling of the middle class car buyer. The Vento is a worthy rival to any Honda/Toyota too.
As i've mentioned earlier, Indians are nationalistic like any other and the only way an import brand can make inroads in this market is to play on these sentiments and the people respond. The Figo is the first in line of Ford's all India lineup and made only in India but shipped worldwide too. The Fiesta sedan is popular but not as much as the Figo 'cause it's sold in China too. Buy a Hyundai i-10 in Mexico city and it will have a 'made in India' sticker on it. The Toyota Etios is all-Indian ,including the engine. You get the picture, i hope.
The new Sunny is mind boggingly ugly. The Fiesta looks ok to me. let's wait till the car is in showrooms, i guess. re: rear design, da majority like dem rumps big and round.
No 7th gen Civic in India. 'Twas but a little over a decade and a half ago and your auto industry was in far better shape than the Indian auto industry. The Lancer was considered a "luxury car" once upon a time.