Hi Gunjan! Here are some 4 day road trips you can check out!
1. Mumbai-Lonavala-Alibaug (630 km) : sightseeing, heritage, forts and beaches
2. Mumbai – Ganpatipule- Ratnagiri – Tarkarli (1000 km) : scenic drive, water sports
3. Mumbai – Amboli – Goa ( 1200 km) : waterfall, beautiful view of ghats,
4. Mumbai – Daman – Champaner-Pavagadh– Udaipur ( 1800 km) : sightseeing, rich cultural heritage, different cuisine
5. Mumbai-Runn of Kutch (1900 km) : bird and wildlife sanctuaries, salt marsh
You can check out some trips here, for more details!
Happy Travelling!