一般五人家庭日常用算夠。比亞迪秦車長4,780mm、車闊1,837mm，軸距2,718mm，屬五座三廂房車規格；450L尾箱應付買餸、返工返學同一般家庭行李問題不大。不過如果五個人一齊長途出遊，再帶大型嬰兒車或多個大喼，尾箱就可能要仔細編排行李。至於後排同時坐三個成年人會唔會鬆動，單靠尺寸未能完全判斷。
It should be adequate for a five-person family in normal daily use. The BYD Qin measures 4,780 mm long and 1,837 mm wide, with a 2,718 mm wheelbase and five seats, so the cabin is reasonably sized for a family saloon. Its 450-litre boot can handle routine shopping and everyday family luggage, though five people travelling with large suitcases or a bulky pram may need to pack carefully. Whether three adults can sit comfortably across the rear bench cannot be confirmed from the dimensions alone.
