Samsung Galaxy A51 vs. Motorola Moto G31

Phone Comparison, Reviews and Tests

In depth comparison and review of Samsung Galaxy A51 and Motorola Moto G31. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.

Phone Specifications Comparison

Samsung Galaxy A51 vs. Motorola Moto G31 Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy A51 Motorola Moto G31
Product Type Smartphone Smartphone
Manufacturer Model Number SM-A515F/DSN -
Form Factor Touch Touch
Height 158.5 mm 161.89 mm Motorola Moto G31 has greater height than Samsung Galaxy A51.
Width 73.6 mm 73.87 mm Motorola Moto G31 has greater width than Samsung Galaxy A51.
Depth 7.9 mm 8.55 mm Samsung Galaxy A51 is narrower than Samsung Galaxy A51.
Weight 172 g 181 g Samsung Galaxy A51 is lighter than Samsung Galaxy A51.
Body Colour Silver | Prism crush black | Haze crush silver | Prism crush blue | Prism crush white Mineral grey | Baby blue
Body Material - Plastic
Waterproof (Water-resistant) - -
SAR Value 0.369 W/kg (head), 1.59 W/kg (body), 2.93 W/kg (limb) 1.46 W/kg (body), 0.67 W/kg (head)
Connector Type USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
SIM Card Type (Size) Nano SIM Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
SIM Card Configuration Details - Nano SIM + nano SIM/microSD
DISPLAY Samsung Galaxy A51 Motorola Moto G31
Display Type OLED display OLED display
Display Technology Super AMOLED OLED
Screen Size (Display Size) 6.5" 6.4" Samsung Galaxy A51 has larger screen size than Motorola Moto G31.
Screen Resolution (Display Resolution) 2400 x 1080 pixels 2400 x 1080 pixels Both phones have the same screen resolution.
Display Format Full HD+ Full HD+
Pixel Density 408 ppi 409 ppi Motorola Moto G31 has better pixel density than Samsung Galaxy A51.
Aspect Ratio - 20:9
Colour Depth 16.7 million colours -
Display Refresh Rate - 60 Hz
Display Features Edge-to-Edge screen, Infinity O display Max Vision display
PROCESSOR Samsung Galaxy A51 Motorola Moto G31
Processor Type (CPU) Samsung Exynos 9611 MediaTek Helio G85
Clock Speed 2.3 GHz 2 GHz Samsung Galaxy A51 has higher clock speed than Motorola Moto G31.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
64-bit Architecture Yes - Samsung Galaxy A51 has 64-bit architecture.
Graphics System (GPU) - ARM Mali-G52 MC2
MEMORY Samsung Galaxy A51 Motorola Moto G31
RAM 4 GB 4 GB Both phones have the same RAM size.
Internal Memory Size (Storage Capacity) 128 GB 64 GB Samsung Galaxy A51 has more internal memory than Motorola Moto G31.
User Memory 107 GB -
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 512 GB microSDHC, microSD, microSDXC - up to 1 TB
CAMERA Samsung Galaxy A51 Motorola Moto G31
MAIN CAMERA
Number of Main Cameras 4 4
Sensor Resolution 48 Megapixel 50 Megapixel Motorola Moto G31 has better camera resolution than Samsung Galaxy A51.
Lens Aperture F/2.0 F/1.8 Motorola Moto G31 has better lens aperture than Samsung Galaxy A51.
Pixel Size - 1.28 μm
Focus Adjustment Automatic Automatic
Digital Zoom 8x -
Self-Timer Delay - Yes
Special Effects - HDR, Spot Colour
Camera Modes Slow motion mode, Live Focus mode Panorama, Pro mode, Timer mode, BurstShot, Watermark mode, Active photos, Cinemagraph, Portrait, Night Vision, AR stickers, Levelling, Macro Vision, Long exposure mode, Live filter, Capture Dual
Face Recognition (Face ID) - Auto smile capture Motorola Moto G31 has face detection.
Light Source LED flash LED flash
Video Resolutions Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps
Camera Features (Functions) AR sticker, background blur, Scene Optimiser, Eye blink, Flaw detection, Stamp, Facial blur Phase Detect Auto-Focus (PDAF), Barcode Scanner, Cutout, Quad Pixel technology, smart composition, RAW photo output, shot optimisation, Google Lens, High-res digital zoom (up to 8x), Assistive Grid
SECOND CAMERA
Sensor Resolution (2nd Camera) 12 Megapixel 8 Megapixel Samsung Galaxy A51 has better second camera resolution than Motorola Moto G31.
Lens Type (2nd Camera) Ultra wide-angle lens Ultra wide-angle lens
Lens Aperture (2nd Camera) F/2.2 F/2.2 Both phones have the same second camera lens aperture.
Field of View (2nd Camera) 123 degree(s) 118 degree(s) Samsung Galaxy A51 has larger second camera lens field of view than Motorola Moto G31.
Pixel Size (2nd Camera) - 1.12 μm
Camera Functions (2nd Camera) - Depth camera
THIRD CAMERA
Sensor Resolution (3rd Camera) 5 Megapixel 2 Megapixel Samsung Galaxy A51 has higher resolution third camera than Motorola Moto G31.
Lens Aperture (3rd Camera) F/2.4 F/2.4 Both phones have the same lens aperture of the third camera.
Pixel Size (3rd Camera) - 1.75 μm
Camera Functions (3rd Camera) Macro camera Macro camera
FOURTH CAMERA
Sensor Resolution (4th Camera) 5 Megapixel -
Lens Type (4th Camera) Telephoto lens -
Lens Aperture (4th Camera) F/2.2 F/2.4 Samsung Galaxy A51 has better fourth camera lens aperture than Samsung Galaxy A51.
Pixel Size (4th Camera) - 1.75 μm
Camera Functions (4th Camera) Depth camera Depth camera
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 32 Megapixel 13 Megapixel Samsung Galaxy A51 has better front camera resolution than Motorola Moto G31.
Lens Aperture (Front) F/2.2 F/2.2 Both phones have the same front camera lens aperture.
Pixel Size (Front) - 1.12 μm
Focus Adjustment Focus free -
Special Effects (Front) - HDR, Spot Colour
Camera Modes (Front) - Slow motion video, Pro mode, Timer mode, BurstShot, HYPERLAPSE, Watermark mode, portrait mode, Face Beauty, Timelapse video, Active photos, Cinemagraph, Portrait, Night Vision, Levelling, Gesture selfie, Group selfie, Long exposure mode, Live filter, Low Light AI Selfie, Capture Dual, Gesture Capture
Face Recognition (Face ID) - Auto smile capture Motorola Moto G31 has face detection.
Video Resolutions (Front) - 1920 x 1080 (1080p) at 30 fps
Camera Features (Front) - Video image stabilisation, RAW photo, Shot optimisation, Selfie animation, Assistive grid
BATTERY AND CHARGING Samsung Galaxy A51 Motorola Moto G31
Battery Capacity (Battery Size) 4000 mAh 5000 mAh Motorola Moto G31 has larger battery capacity than Samsung Galaxy A51.
Talk Time 1920 minutes -
Run Time Details Active online usage (LTE): up to 15 hrs
Active online usage (Wi-Fi): up to 16 hrs
Playback (video): up to 20 hrs
Playback (audio): up to 87 hrs
Talk (4G): up to 1920 min
Standard usage: up to 36 hrs
Battery Technology Lithium Ion -
CELLULAR Samsung Galaxy A51 Motorola Moto G31
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 4G Both phones have the same mobile network generation.
Operating System Android 10 Android 11
User Interface One UI -
Intelligent Assistant Bixby Google Assistant
Navigation GPS, GLONASS, BeiDou, Galileo GPS, A-GPS, GLONASS, Galileo
COMMUNICATIONS Samsung Galaxy A51 Motorola Moto G31
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE LTE
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM -
3G UMTS Band Band 1, Band 2, Band 4, Band 5, Band 8 -
3G UMTS Frequency 2100, 1900, 1700, 850, 900 -
4G LTE Band Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 20, Band 26, Band 28, Band 38, Band 40, Band 41, Band 66 -
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 -
Wireless Interface IEEE 802.11a/b/g/n/ac, ANT+ IEEE 802.11a/b/g/n/ac
Bluetooth Bluetooth 5.0 LE Bluetooth 5.0
Bluetooth Profiles HFP, HSP, OPP, PAN, A2DP, AVRCP, HID, SAP, PBAP, MAP, HOGP -
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Messaging Services SMS, MMS -
MEDIA Samsung Galaxy A51 Motorola Moto G31
Supported Digital Audio Standards WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID Dolby Atmos
Supported Digital Video Standards MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 -
FEATURES Samsung Galaxy A51 Motorola Moto G31
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert -
Sensors Accelerometer, ambient light sensor, proximity sensor, gyro sensor, hall sensor, geomagnetic sensor Accelerometer, ambient light sensor, proximity sensor, digital compass, SAR sensor, gyroscope
Security Devices Fingerprint reader (under display) Face recognition, fingerprint reader
Security Technology - Face Unlock
Additional Phone Features Fast Charging, Samsung KNOX, Bixby Vision, Game Booster, Bixby Routines Dual microphones
OTHERS Samsung Galaxy A51 Motorola Moto G31
Included Accessories Power adapter Protective cover, USB cable, SIM card removal tool, 10W charger
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