A well maintain 660 cc car can do it. Keep 100km per hour speed. I did it on my Daihatsu MOVE 2019 in 2022 March(on AC through out the journey) from Karachi-Multan ( one day rest at hotel with 12 hours drive and few stop for washroom, prayer and rest) then
Multan to Pindi (one day rest) then
Pindi to Swat
travel in day only as per my plan.
Take my note, if you are travel for fun then enjoy it. You will face a little awkward within Hyderabad to Multan. But you can add a stop between these cities. Like Bahalwalpur which has a rich history
Before a month keep brake service, Tyres should be good, AC must be good, keep shades for window so AC works well. But make sure the black shared should not hurdle while your drive in day. Recently I came across a nano sheet which is transparent and help to take away heat pass through the car glasses. I wish I will try that as well in future