Why the Split Is Old Delhi and New Delhi
The mistake almost every two-day plan makes is ordering the sights by fame rather than by geography. Delhi punishes that harder than most cities, because the distances are long and the traffic between five and eight in the evening is genuinely immovable.
So the split is not thematic, it is practical. Day one is Old Delhi, which is Shah Jahan's 1639 city and is walkable once you are inside it. Day two is New Delhi, which is the Lutyens capital of 1911 to 1931 and is spread out but well served by Metro.
Do it this way and you cross the city twice, both times outside the worst hours. Do it by fame and you will cross four times and spend a third of your trip in a car.
One hard constraint: not on a Monday. The Red Fort, the Lotus Temple and Akshardham all close, which removes an anchor from each day.



