Microsoft Lumia 640 XL vs Oppo A57

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

  A57: 24 g lighter

  Lumia 640 XL:

  171 g

  A57:

  147 g

• Width

  A57: 8.6 mm narrower

  Lumia 640 XL:

  81.5 mm

  A57:

  72.9 mm

• Screen diagonal

  A57: 0.5 in smaller diagonal

  Lumia 640 XL:

  5.7 in

  A57:

  5.2 in

• Chipset

  Lumia 640 XL:

  Qualcomm MSM8226 Snapdragon 400 (28 nm)

  A57:

  Qualcomm MSM8940 Snapdragon 435 (28 nm)

• Depth

  A57: 1.3 mm thinner

  Lumia 640 XL:

  9 mm

  A57:

  7.7 mm

• Height

  A57: 8.8 mm shorter

  Lumia 640 XL:

  157.9 mm

  A57:

  149.1 mm

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. Lumia 640 XL

   Height:

   157.9 mm +8.8 mm versus A57

   Width:

   81.5 mm +8.6 mm versus A57

   Depth:

   9 mm +1.3 mm versus A57

2. 2. A57

   Height:

   149.1 mm

   Width:

   72.9 mm

   Depth:

   7.7 mm

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. Lumia 640 XL

   Screen diagonal:

   5.7 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   89.6 cm²

2. 2. A57

   Screen diagonal:

   5.2 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   74.5 cm²

Lumia 640 XL has approximately 20.2% more rectangular screen area than A57.

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.