Home Phone comparison Google Pixel 9a and Samsung Galaxy A51 - Which is better?

Google Pixel 9a vs Samsung Galaxy A51

76 out 100
Google Pixel 9a
VS
41 out 100
Samsung Galaxy A51
Google Pixel 9a
Samsung Galaxy A51

Compared 2 smartphones : Google Pixel 9a Manufactured in April, 2025, with display 6.3 with chipsetGoogle Tensor G4, vs Samsung Galaxy A51, Manufactured in December, 2019 with chipsetSamsung Exynos 9 Octa 9611. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Google Pixel 9a
  • Higher pixel density: 422ppi
  • Higher refresh rate: 120Hz
  • Higher battery capacity: 5100mAh vs 4000mAh
  • Newer Bluetooth version: 5.3 vs 5
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Built-in eSIM
Reasons to choose Samsung Galaxy A51
  • Larger display: 6.5in
  • Lighter design: 172g vs 186g
  • Supports Dolby Atmos

Versions

Available versions and configurations
Memory Options - 8/128 GB
- 8/256 GB		 - 4/64 GB
- 4/128 GB
- 6/128 GB
- 8/128 GB
- 8/256 GB

Review

Key Specs Google Pixel 9a and Samsung Galaxy A51
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Google Pixel 9a
vs
Samsung Galaxy A51

Display

Display quality comparison
Type POLED Super AMOLED
Size 6.3 in 6.5 in
Resolution 1080x2424 pixels 1080x2400 pixels
Aspect ratio 20:9 20:9
Pixel density 422 ppi 405 ppi
Refresh rate 120 Hz 60 Hz
Adaptive refresh rate Yes (60-120 Hz) No
Max brightness 2700 nits 400 nits
HDR support Yes HDR10+ No
Screen-to-body ratio 84.5 % 87.5 %
Features - DCI-P3
- Always-On Display		 Always-On Display
Display test
Peak brightness (auto)
Google Pixel 9a
n/a
Samsung Galaxy A51
631 nits
sRGB gamutn/a98.8 %
PWM (Flicker)n/a242 Hz
Response timen/a25 ms
Contrastn/a∞ Infinite
Sources: NotebookCheck [Samsung Galaxy A51]

Design & Build

Design and ergonomics comparison
Height 154.7 mm (6.09 in) 158.5 mm (6.24 in)
Width 73.3 mm (2.89 in) 73.6 mm (2.9 in)
Thickness 8.9 mm (0.35 in) 7.9 mm (0.31 in)
Weight 186 g (6.56 oz) 172 g (6.07 oz)
Water resistance IP68 No
Back panel Plastic Plastic
Frame Metal Plastic
Colors - White
- Black
- Red
- Purple		 - White
- Black
Fingerprint sensor Yes In-Display Yes In-Display
Screen-to-body ratio
Google Pixel 9a
84.5 %
Samsung Galaxy A51
87.5 %

Performance

Testing Google Pixel 9a and Samsung Galaxy A51 In benchmarks
Processor
Chipset Google Tensor G4 Samsung Exynos 9 Octa 9611
Max Frequency 3100 MHz 2300 MHz
CPU Cores 8 (1 + 3 + 4) 8 (4 + 4)
Architecture - 4/1.92 (Cortex-A520)
- 3/2.6 (Cortex-A720)
- 1/3.1 (Cortex-X4)		 - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)
Process Samsung Samsung
Transistor Size 4 nm 10 nm
Neural Processor Yes Yes
Graphics Mali-G715 MP7 Mali-G72 MP3
GPU Cores 896 54
GPU Frequency 940 MHz 850 MHz
FLOPS 1792 GFLOPS 113.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Google Pixel 9a
1677
Samsung Galaxy A51
512
Geekbench 6 (Multi-Core)
Google Pixel 9a
4067
Samsung Galaxy A51
1556
Geekbench 6 (Single-Core)1677512
Geekbench 6 (Multi-Core)40671556
Geekbench Compute (GPU)7784n/a
Sources: Geekbench v6 [Google Pixel 9a]
AnTuTu 10
AnTuTu 10
Google Pixel 9a
991079
Samsung Galaxy A51
268760
CPU16173783857
GPU46486545166
Memory19175063828
UX17272775909
NanoReview Score991079268760
3DMark Wild Life
3DMark Wild Life
Google Pixel 9a
n/a
Samsung Galaxy A51
812
Max Surface Temp.n/a42.2 °C
Stabilityn/a95 %
Graphics Testn/a4 fps
Graphics Scoren/a812
Sources: 3DMark [Samsung Galaxy A51]

Memory

RAM
RAM Size 8 GB - 4 GB
- 6 GB
Memory Type LPDDR5X LPDDR4X
Memory Frequency 4200 MHz 1866 MHz
Channels 4 2
Storage
Storage Capacity- 128 GB
- 256 GB		- 64 GB
- 128 GB
Storage TypeUFS 3.1UFS 2.0
Memory CardNoMicroSD

Software

OS Android 15 Android 10 (Upgradeable to Android 13)
OS Size n/a 23 GB
UI Skin Stock Android One UI 5.1

Battery

Volume 5100 mAh 4000 mAh
Max Charging Power 23 W 15 W
Battery Type Li-Po Li-Po
Removable No No
Wireless Charging Yes (7.5 W) No
Reverse Charging n/a No
Fast Charging Yes (50% in 30 min) Yes (40% in 35 min)
Full Charge Time n/a 1:50 h
Battery Life Test
Battery Life
Google Pixel 9a
n/a
Samsung Galaxy A51
17:53
Web Browsingn/a07:15 h
Video Playbackn/a11:25 h
Gamesn/a04:49 h
Standby Moden/a81 h

Main camera

Matrix 48 MP 48 MP
Photo resolution 8000x6000 pixels 8000x6000 pixels
Zoom Digital Digital
Flash Dual LED LED
Stabilization Optical Digital
8K Recording No No
4K Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
Slow Motion 240 fps (1080p) 960 fps (720p)
Wide-angle lens 120 ° 120 °
Lenses count Standard: 50 MP
Ultra-wide: 13 MP		 Standard: 48 MP
Ultra-wide: 12 MP
Macro: 5 MP
Depth: 5 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix50 MP48 MP
Aperturef/1.7f/2.0
Focal length25 mm26 mm
Sensorn/aSony IMX582
Sensor size1/1.21/2
Pixel size0.8 μm0.8 μm
AutofocusPhase autofocus (Dual Pixel)Phase autofocus
StabilizationOpticalDigital
Ultra-wide lens
Matrix13 MP12 MP
Aperturef/2.2f/2.2
Focal lengthn/a13 mm
Sensor size1/3.1n/a
Pixel sizen/a1.12 μm
StabilizationDigitalDigital

Front camera

Matrix 13 MP 32 MP
Photo resolution 4032x3024 pixels 6560x4928 pixels
Aperture f/2.2 f/2.2
Focal length 20 mm 26 mm
Sensor CMOS Samsung S5KGD1
Sensor size 1/3.1 1/2.8
Pixel size 1.12 μm 0.8 μm
Autofocus n/a No
Stabilization Digital Digital
Video resolution 2160p (4K) at 30 fps 2160p (4K) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 6E (802.11 a/b/g/n/ac/ax) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5.3 5
Bluetooth features LE PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort Yes n/a
GPS - GPS
- GLONASS
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Yes
Infrared Port No No
Connectivity
SIM Count*12
SIM TypeNanoNano
SIM Moden/aDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM/EDGE: Quad-band (850, 900, 1800, 1900 MHz)GSM 850 / 900 / 1800 / 2100 / 2600
3G BandsUMTS/HSPA+/HSDPA 1, 2, 4, 5, 6, 8, 19UMTS 850 / 900 / 1900 / 2100
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B17/B20/B25/B26/B28/B29/B30/B38/B41/B48/B66/B71)LTE (B850/B900/B1800/B2100/B2600)
LTE categoryn/a12
5G SupportYesNo

Sound

Speakers Stereo Mono
3.5 mm Jack No Yes
FM Radio No Yes
Dolby Atmos No Yes
Speaker Test
Max Volume
Google Pixel 9a
n/a
Samsung Galaxy A51
81.7 dB

Other

Class Mid-range Mid-range
Announced March, 2025 yr December, 2019 yr
Release Date April, 2025 yr December, 2019 yr
Launch Price ($) 499 399
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No n/a
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Google Pixel 9a the clear winner in this comparison.

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