Asus Zenfone 4 Pro ZS551KL
#1219
Google Pixel 4a
#877Category Breakdown
Asus Zenfone 4 Pro ZS551KL
Google Pixel 4a
Performance
80.282.5
Camera
94.693.7
Display
80.283.8
Battery
26.925.5
Build
80.571.8
Connectivity
67.973.4
Audio
71.587.6
Overall
61.567.3
Summary
- The Asus Zenfone 4 Pro ZS551KL features a glass and aluminum build, offering a premium feel, while the Google Pixel 4a has a plastic back and frame, making it lighter and more compact.
- The Zenfone's 5.5-inch AMOLED display has a resolution of 1080 x 1920 pixels, whereas the Pixel 4a's 5.81-inch OLED display provides a higher resolution of 1080 x 2340 pixels with HDR support.
- In terms of performance, the Zenfone is powered by the Snapdragon 835 chipset, which is more powerful than the Snapdragon 730G in the Pixel 4a, although both have 6GB of RAM.
- Camera capabilities are similar, with both devices featuring a 12 MP main sensor and optical image stabilization, but the Pixel 4a supports gyro-EIS for video stabilization.
- The Zenfone has a larger 3600 mAh battery compared to the Pixel's 3140 mAh, but both support 18W charging.
- Software-wise, the Zenfone runs on an older version of Android (upgradable to Oreo), while the Pixel 4a comes with Android 10 and is upgradable to Android 13, providing a more current software experience.
Side-by-side Specification Comparison
Asus Zenfone 4 Pro ZS551KL
Google Pixel 4a
General
Release Date
2017
2020, August 03
Announced
2017
2020, August 03
Description
N/A
Not to be confused with Google Pixel 4a 5G
Display
Size
5.5"
5.81"
Type
AMOLED
OLED, HDR
Resolution
1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
1080 x 2340 pixels, 19.5:9 ratio (~443 ppi density)
PPI
1080
1080
Refresh Rate
60Hz
60Hz
HDR Support
✗
✓
Protection
Corning Gorilla Glass 5
Corning Gorilla Glass 3
Performance
Chipset
Qualcomm MSM8998 Snapdragon 835 (10 nm)
Qualcomm SDM730 Snapdragon 730G (8 nm)
CPU
Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver)
GPU
Adreno 540
Adreno 618
Memory
64GB 6GB RAM, 128GB 6GB RAM
128GB 6GB RAM
Expandable Storage
✗
✗
Card Slot
microSDXC (uses shared SIM slot)
No
Camera
Main Camera
12 MP, f/1.7, 25mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, 4-axis OIS16 MP, 50mm (telephoto), 1/3.1", 1.0µm, AF, 2x optical zoom
12.2 MP, f/1.7, 27mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, OIS
Main Camera Features
Laser AF, color spectrum sensor, LED flash, HDR, panorama
LED flash, Pixel Shift, Auto-HDR, panorama
Front Camera
8 MP, f/1.9, 22mm (wide), 1/3.2", 1.4µm, PDAF
8 MP, f/2.0, 24mm (wide), 1.12µm
Front Camera Features
HDR
HDR
Video Recording
4K@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps
4K@30fps, 1080p@30/60/120fps; gyro-EIS
Selfie Video
1080p@30fps
1080p@30fps
Optical Stabilization
✓
✓
Night Mode
✗
✗
Raw Photo Support
✗
✗
Battery
Capacity
3600 mAh
3140 mAh
Battery Details
Li-Ion 3600 mAh, non-removable
Li-Po 3140 mAh
Charging Details
18W wired, 50% in 32 min
18W wired, PD2.0
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Safety
Dimensions
156.9 x 75.6 x 7.6 mm (6.18 x 2.98 x 0.30 in)
144 x 69.4 x 8.2 mm (5.67 x 2.73 x 0.32 in)
Weight
175 g
143 g
Materials
Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
Glass front (Gorilla Glass 3), plastic back, plastic frame
Colors
Moonlight white, Pure Black
Just Black, Barely Blue
Foldable
✗
✗
SAR
N/A
N/A
Connectivity
SIM
Nano-SIM + Nano-SIM
Nano-SIM +eSIM
Network
GSM / HSPA / LTE
GSM / HSPA / LTE
Network Speed
HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/150 or 100 Mbps
HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/75 Mbps
5G
✗
✗
4G
✓
✓
WiFi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA
Bluetooth
5.0, A2DP, EDR, LE, aptX
5.0, A2DP, LE, aptX HD
NFC
✓
✓
USB
USB Type-C 2.0, OTG
USB Type-C 3.1
IR Blaster
✗
✗
Headphone Jack
✓
✓
Radio
✗
✗
Positioning
GPS, GLONASS, BDS, GALILEO
GPS, GLONASS, GALILEO, QZSS, BDS
Audio
Stereo Speakers
✗
✓
Loudspeaker
Yes, dual speakers
Yes, with stereo speakers
Audio Jack
Yes
Yes
Software & Security
Operating System
Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo), ZenUI 4
Android 10, upgradable to Android 13
Fingerprint
✓
✓
Face Unlock
✗
✗
Sensors
Fingerprint (front-mounted), accelerometer, gyro, proximity, compass
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer