Asus Zenfone 4 Pro ZS551KL vs OnePlus 8: specs comparison

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

Zenfone 4 Pro ZS551KL: 5 g lighter

Zenfone 4 Pro ZS551KL:

175 g

8:

180 g
Width

8: 2.7 mm narrower

Zenfone 4 Pro ZS551KL:

75.6 mm

8:

72.9 mm
Screen diagonal

Zenfone 4 Pro ZS551KL: 1.05 in smaller diagonal

Zenfone 4 Pro ZS551KL:

5.5 in

8:

6.55 in
Memory variants

At 128 GB storage

Zenfone 4 Pro ZS551KL:

6 GB RAM

8:

8 GB RAM
Chipset

Zenfone 4 Pro ZS551KL:

Qualcomm MSM8998 Snapdragon 835 (10 nm)

8:

Qualcomm SM8250 Snapdragon 865 (7 nm+)
Rear camera layout

Zenfone 4 Pro ZS551KL:

Dual

8:

Triple

Physical size

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. Zenfone 4 Pro ZS551KL

Height:

156.9 mm
Width:

75.6 mm +2.7 mm versus 8
Depth:

7.6 mm
2. 8

Height:

160.2 mm +3.3 mm versus Zenfone 4 Pro ZS551KL
Width:

72.9 mm
Depth:

8 mm

Weight

Bars start at zero and share a scale within this chart.

1. Zenfone 4 Pro ZS551KL

175 g
2. 8

180 g

+5 g 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. Zenfone 4 Pro ZS551KL

Screen diagonal:

5.5 in

Aspect ratio (height:width):

16:9

Approximate rectangular screen area:

83.4 cm²
2. 8

Screen diagonal:

6.55 in

Aspect ratio (height:width):

20:9

Approximate rectangular screen area:

103.6 cm²

8 has approximately 24.2% more rectangular screen area than Zenfone 4 Pro ZS551KL.

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.

Recorded RAM for Zenfone 4 Pro ZS551KL, 8, compared at the same storage capacity.
Storage	Zenfone 4 Pro ZS551KL	8
64 GB	6 GB RAM	Not recorded
128 GB Recorded for all phones	6 GB RAM	8 GB RAM
256 GB	Not recorded	12 GB RAM

Practical features

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

1. Zenfone 4 Pro ZS551KL

NFC:: Yes
Headphone jack:: Yes
Memory card support:: See details microSD · up to 512 GB (uses SIM 2 slot)

2. 8

NFC:: Yes
Headphone jack:: No
Memory card support:: No

Battery capacity

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

Recorded battery capacity

Bars start at zero and share a scale within this chart.

1. Zenfone 4 Pro ZS551KL

3600 mAh
2. 8

4300 mAh

+700 mAh versus Zenfone 4 Pro ZS551KL

Specifications

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.

1. Zenfone 4 Pro ZS551KL2. 8

Everyday essentials

Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, 8.
Specification	Zenfone 4 Pro ZS551KL	8
Dimensions (HxWxD)	156.9 Х 75.6 Х 7.6 mm	160.2 Х 72.9 Х 8 mm
Weight	175 g	180 g
Technology	AMOLED	Fluid AMOLED
Screen size	5.5" inch	6.55" inch
Screen resolution	1080 x 1920 px	1080 x 2400 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.	64/128 GB 6 GB RAM	128GB 8GB RAM 256GB 12GB RAM
Memory card support	microSD up to 512 GB (uses SIM 2 slot)	No
Battery Capacity is not battery life. No endurance test is implied.	3600 mAh Non-removable Li-Ion	4300 mAh Non-removable Li-Po
Operating system OS	Android 7.1.1 (Nougat) upgradable to Android 8 (Oreo); ZenUI 4	Android 10.0; OxygenOS 10.0
Chipset	Qualcomm MSM8998 Snapdragon 835 (10 nm)	Qualcomm SM8250 Snapdragon 865 (7 nm+)
NFC	Yes	Yes
Headphone jack	Yes	No

Display

Display — specifications for Zenfone 4 Pro ZS551KL, 8.
Specification	Zenfone 4 Pro ZS551KL	8
Touchscreen	capacitive touchscreen	capacitive touchscreen
Display colors	16M	16M
Screen area	83.4 cm2	103.6 cm2
Screen format	16:9 (height:width)	20:9 (height:width)
Screen to body ratio	70.3%	88.7%
PPI /points per inch/	401 PPI	402 PPI
Screen protection	Corning Gorilla Glass 5	Corning Gorilla Glass

Camera and Video

Camera and Video — specifications for Zenfone 4 Pro ZS551KL, 8.
Specification	Zenfone 4 Pro ZS551KL	8
Rear camera, main	12 MP Dual	48 MP Triple
Camera specs	12 MP f/1.7 25mm (wide) 1/2.55'' 1.4µm 4-axis OIS dual pixel PDAF & laser AF -16 MP 50mm (telephoto) 1/3.1'' 1.0µm 2x optical zoom AF	48 MP f/1.8 25mm (wide) 1/2.0'' 0.8µm PDAF OIS -16 MP f/2.2 13mm (ultrawide) PDAF -2 MP f/2.4 (macro)
Functions	HDR	Auto-HDR
Video	1080p@30fps	1080p@30fps gyro-EIS
Front camera, selfie	8 MP Single	16 MP Single
Specifications	8 MP f/1.9 1/3.2'' 22mm (wide) 1.4µm PDAF	16 MP f/2.0 (wide) 1/3'' 1.0µm

Performance

Performance — specifications for Zenfone 4 Pro ZS551KL, 8.
Specification	Zenfone 4 Pro ZS551KL	8
Processor CPU	Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)	Octa-core (1x2.84 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.8 GHz Kryo 585)
Graphics processor GPU	Adreno 540	Adreno 650

General specs

General specs — specifications for Zenfone 4 Pro ZS551KL, 8.
Specification	Zenfone 4 Pro ZS551KL	8
Release date	2017 August	2020 April 14
Colors	Moonlight White Pure Black	Onyx Black Glacial Green Interstellar Glow Polar Silver
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.	390 EUR	700 EUR
Battery life	Talking time- Up to 27 h 30 min (3G)	Unknown
Body build	Front/back glass (Gorilla Glass 5) & aluminum frame	Glass front (Gorilla Glass) glass back (Gorilla Glass) aluminum frame

Communication and Connectivity

Communication and Connectivity — specifications for Zenfone 4 Pro ZS551KL, 8.
Specification	Zenfone 4 Pro ZS551KL	8
SIM card	Hybrid Dual SIM (Nano-SIM dual stand-by)	Dual SIM (Nano-SIM dual stand-by)
Network	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100 -4G - LTE band 1(2100) 2(1900) 3(1800) 4(1700/2100) 5(850) 7(2600) 8(900) 17(700) 19(800) 20(800) 28(700) 38(2600) 39(1900) 40(2300) 41(2500) - Global Taiwan LTE band 1(2100) 12(700) 18(800) 26(850) 29(700) 30(2300) 41(2500) - US Canada Brazil LTE band 1(2100) 41(2500) - India	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2CDMA 800 / 1900 & TD-SCDMA -3G - HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100 -4G - LTE band 1(2100) 2(1900) 3(1800) 4(1700/2100) 5(850) 7(2600) 8(900) 12(700) 13(700) 17(700) 18(800) 19(800) 20(800) 25(1900) 26(850) 28(700) 32(1500) 34(2000) 38(2600) 39(1900) 40(2300) 41(2500) 42(3500) 46(5200) 66(1700/2100) - EU -5G - 5G band 1(2100) 78(3500); SA/NSA - EU 5G band 2(1900) 66(1700) 71(600); SA/NSA - NA 5G band 78(3500); SA/NSA - IN 5G band 41(2500) 78(3500) 79(4700); SA/NSA - CNmmWave - Verizon exclusive
Speed	HSPA 42.2/5.76 Mbps LTE-A (3CA) Cat12 600/150 or 100 Mbps	HSPA 42.2/5.76 Mbps LTE-A (5CA) Cat18 1200/150 Mbps 5G 7.5 Gbps DL
GPRS	Yes	Yes
Edge	Yes	Yes
Wi-Fi	Wi-Fi 802.11 a/b/g/n/ac dual-band WiFi Direct hotspot	Wi-Fi 802.11 a/b/g/n/ac/ax dual-band Wi-Fi Direct DLNA hotspot
GPS	Yes with A-GPS GLONASS BDS GALILEO	Yes with dual-band A-GPS GLONASS BDS GALILEO SBAS
USB	Type-C 1.0 reversible connector	3.1 Type-C 1.0 reversible connector USB On-The-Go
Bluetooth	5.0 A2DP EDR LE aptX	5.1 A2DP LE aptX HD

Music and Audio

Music and Audio — specifications for Zenfone 4 Pro ZS551KL, 8.
Specification	Zenfone 4 Pro ZS551KL	8
Radio	FM radio	No
Others	24-bit/192kHz audio -DTS sound -Active noise cancellation with dedicated mic	HDR10+ -90Hz refresh rate

Other features

Other features — specifications for Zenfone 4 Pro ZS551KL, 8.
Specification	Zenfone 4 Pro ZS551KL	8
Dop	Sensors Fingerprint (front-mounted) accelerometer gyro proximity compass color spectrum Infrared port - Fast battery charging: 50% in 32 min	Sensors Fingerprint (under display optical) accelerometer gyro proximity compass - Fast charging 30W 50% in 22 min (advertised) - IP68 dust/water resistant (up to 1.5m for 30 mins)

Asus Zenfone 4 Pro ZS551KL vs OnePlus 8