Historically, Fiat technicians were a TASS bunch. TATA never had reputation for petrol engines. Their petrol engines were FIRE, that too 8V, on which they learnt their work. That too very few in number. Earlier Indicas had them. Manza came later! The Linea is a 1.368 DOHC 16V FIRE, more complex than the 1.172L 8V SOHC. IMHO, the mistri class has no solid understanding of petrol mills apart from the susuki or goonday engines. @asimpleson is trying to say just that: lack of understanding of the less popular 1.4 mill, and even less guineapigs for the workshops to learn.