Lava Z40 vs Microsoft Lumia 640 XL

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

  Z40: 51 g lighter

  Z40:

  120 g

  Lumia 640 XL:

  171 g

• Width

  Z40: 17.6 mm narrower

  Z40:

  63.9 mm

  Lumia 640 XL:

  81.5 mm

• Screen diagonal

  Z40: 1.7 in smaller diagonal

  Z40:

  4 in

  Lumia 640 XL:

  5.7 in

• Chipset

  Z40:

  Unisoc SC9832E

  Lumia 640 XL:

  Qualcomm MSM8226 Snapdragon 400 (28 nm)

• Depth

  Lumia 640 XL: 2.7 mm thinner

  Z40:

  11.7 mm

  Lumia 640 XL:

  9 mm

• Height

  Z40: 32.4 mm shorter

  Z40:

  125.5 mm

  Lumia 640 XL:

  157.9 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. Z40

   Height:

   125.5 mm

   Width:

   63.9 mm

   Depth:

   11.7 mm +2.7 mm versus Lumia 640 XL

2. 2. Lumia 640 XL

   Height:

   157.9 mm +32.4 mm versus Z40

   Width:

   81.5 mm +17.6 mm versus Z40

   Depth:

   9 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. Z40

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 cm²

2. 2. Lumia 640 XL

   Screen diagonal:

   5.7 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   89.6 cm²

Lumia 640 XL has approximately 96.7% more rectangular screen area than Z40.

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.