Asus Zenfone 4 Pro ZS551KL vs Celkon A40

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

  A40: 48.5 g lighter

  Zenfone 4 Pro ZS551KL:

  175 g

  A40:

  126.5 g

• Width

  A40: 11.6 mm narrower

  Zenfone 4 Pro ZS551KL:

  75.6 mm

  A40:

  64 mm

• Screen diagonal

  A40: 1.5 in smaller diagonal

  Zenfone 4 Pro ZS551KL:

  5.5 in

  A40:

  4 in

• Rear camera layout

  Zenfone 4 Pro ZS551KL:

  Dual

  A40:

  Single

• Depth

  Zenfone 4 Pro ZS551KL: 3.2 mm thinner

  Zenfone 4 Pro ZS551KL:

  7.6 mm

  A40:

  10.8 mm

• Height

  A40: 30.7 mm shorter

  Zenfone 4 Pro ZS551KL:

  156.9 mm

  A40:

  126.2 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. Zenfone 4 Pro ZS551KL

   Height:

   156.9 mm +30.7 mm versus A40

   Width:

   75.6 mm +11.6 mm versus A40

   Depth:

   7.6 mm

2. 2. A40

   Height:

   126.2 mm

   Width:

   64 mm

   Depth:

   10.8 mm +3.2 mm versus Zenfone 4 Pro ZS551KL

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. Zenfone 4 Pro ZS551KL

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   83.4 cm²

2. 2. A40

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 cm²

Zenfone 4 Pro ZS551KL has approximately 83.1% more rectangular screen area than A40.

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.