Safire engine has some inner problems

As normal car vista is a good car but if it comes to the engine and the performance it is the worst. The engine provided in indica vista the safire 65 is a avery bad engine the whole great value of the car comes to an end if you see the engine performance. because I also have bought an indica vista safire driven it 35000kms and in that 35000kms it needed to be towed 5 times and almost in every two months it stayed in servicing centere for 1 week. I took the car in 3 different servicing centers but they all say that the engine has some manufacturing defect and they even cannot deyect the defect. They always say to me that i need to sell the car in secondhand showroom or dealers because they cannot solve the problems of the engine. The problems of the engine were like in hevy traffic jams you cannot drove the car in 1st gear engine stops with knocking, then in highways you cannot drove it faster than 100kms it started knocking. About five times i have towed this car from highways and also city therfore, there was a good relation between me and tow service. even the tow service guy asked me not to drive this car anymore because even they were tired of towing my car and every time i towed it i have to pay 2000rs. This car become familiar to the servicing center also as it always remain there every after 2 months of first visit. Two months before i have sold that car to a secondhand dealer in 2lacs after 1.5 years and yesterday i saw it in a local garrage without front wheels.