The Tata Sierra is an excellent option for you, keeping your big boot space requirements in mind. The Sierra boasts a boot up to 622 litres (up to the roof), which should serve your needs well.
Moreover, it is a spacious car, and the Sierra Pure 1.5 Petrol MT variant that'll fit within your budget gets the basics like a touchscreen, electric mirror adjustment, keyless entry, rear AC vents, etc.
Another option that you can consider for its expansive boot space is the MG Hector.




