Number Plates on the vehicles does not correspond to the mid-seventies era. Plates shown in the movie had white background with black texts instead of Black background with white texts. It wasn't until year 2000, Black text over white background became the norm.
Around 1 hour 50 min in the film, during the Hospital scene, a white ambassador car bearing number DLJ 1617 is the Final Generation Ambassador car which came into production only in 2013, 38 years after the time-line of the movie. It can be clearly seen that the number plate on this car is inserted over the original plate. Two plates can be seen when camera pan to give you the side-view.
In the hospital scene around 1 hour 50 min in the film, the hospital name is shown as 'Swami Vivekanand Hospital'. However, a few frames later the chemist shop name board on the same hospital shows the actual name of the hospital - 'Dhirubhai Ambani Hospital'. In the same scene, the Mercedes car DLZ 407 parked in the hospital premise was earlier used by 'Chief' Associates.