Infinix Zero 4 vs Oppo A31

Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

• Weight

  Zero 4: 12.5 g lighter

  Zero 4:

  167.5 g

  A31:

  180 g

• Screen diagonal

  Zero 4: 1 in smaller diagonal

  Zero 4:

  5.5 in

  A31:

  6.5 in

• Rear camera layout

  Zero 4:

  Single

  A31:

  Triple

• Depth

  Zero 4: 0.5 mm thinner

  Zero 4:

  7.8 mm

  A31:

  8.3 mm

• Height

  Zero 4: 12.4 mm shorter

  Zero 4:

  151.5 mm

  A31:

  163.9 mm

• Release year

  Zero 4:

  2017

  A31:

  2020

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

1. 1. Zero 4

   Height:

   151.5 mm

   Width:

   76 mm

   Depth:

   7.8 mm

2. 2. A31

   Height:

   163.9 mm +12.4 mm versus Zero 4

   Width:

   75.5 mm

   Depth:

   8.3 mm +0.5 mm versus Zero 4

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

1. 1. Zero 4

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   83.4 cm²

2. 2. A31

   Screen diagonal:

   6.5 in

   Aspect ratio (height:width):

   20:9

   Approximate rectangular screen area:

   102 cm²

A31 has approximately 22.3% more rectangular screen area than Zero 4.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

Battery capacity

Capacity is not battery life. No endurance test is implied.

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.