Samsung Galaxy A21 vs Samsung Galaxy A51
Short Description
Samsung Galaxy A21
Screen size: 6.4" / Resolution: 720 x 1600 px / Main camera: 13 MP & 5 MP & 2 MP & 2 MP / Front camera: 8MP / RAM: 3GB / Battery power: 4000 mAh / Internal storage: 32GB / SIM cards: 1 SIM
Samsung Galaxy A51
Screen size: 6.5" / Resolution: 1080 x 2400 px / Main camera: 48 MP & 12 MP & 5 MP & 5 MP / Front camera: 32MP / RAM: 4GB, 6GB, 8GB / Battery power: 4000 mAh / Internal storage: 64GB, 128GB, 256GB / SIM cards: 2 SIM
Key Differences
Samsung Galaxy A21
Samsung Galaxy A51
How is Samsung Galaxy A21 better than Samsung Galaxy A51?
Faster CPU speed: 4 x 2.3 GHz & 4 x 1.8 GHz vs 4 x 2.3 GHz & 4 x 1.7 GHz
The phone is 6 months newer
Samsung Galaxy A21
Samsung Galaxy A51
How is Samsung Galaxy A51 better than Samsung Galaxy A21?
More RAM memory capacity in max option: 4GB, 6GB, 8GB vs 3GB
AnTuTu score is about 112% higher
More internal storage in max option: 64GB, 128GB, 256GB vs 32GB
More megapixels main camera: 48 MP & 12 MP & 5 MP & 5 MP vs 13 MP & 5 MP & 2 MP & 2 MP
More megapixels front camera: 32MP vs 8MP
Has a larger display diagonal: 6.5" vs 6.4"
Better display resolution: 1080 x 2400 px vs 720 x 1600 px
Lighter: 172 g (6.07 ounces) vs 193 g (6.81 ounces)
Narrower: 73.6 mm (2.9 inches) vs 76.7 mm (3.02 inches)
Shorter: 158.5 mm (6.24 inches) vs 167.8 mm (6.61 inches)
More color options: Prism Crush Black, Prism Crush White, Prism Crush Blue, Prism Crush Pink vs Black
Size Comparison
Samsung Galaxy A21
Samsung Galaxy A51
Height
167.8 mm
(6.61 inches)
Width
76.7 mm
(3.02 inches)
Thickness
8.1 mm
(0.32 inches)
Screen size
6.4"
Weight
193 g
(6.81 ounces)
6.4"
6.5"
Height
158.5 mm
(6.24 inches)
Width
73.6 mm
(2.9 inches)
Thickness
7.9 mm
(0.31 inches)
Screen size
6.5"
Weight
172 g
(6.07 ounces)
Height
167.8 mm
(6.61 inches)
Width
76.7 mm
(3.02 inches)
Thickness
8.1 mm
(0.32 inches)
Screen size
6.4"
Weight
193 g
(6.81 ounces)
Height
158.5 mm
(6.24 inches)
Width
73.6 mm
(2.9 inches)
Thickness
7.9 mm
(0.31 inches)
Screen size
6.5"
Weight
172 g
(6.07 ounces)
3D comparison
Samsung Galaxy A21
Samsung Galaxy A51
Samsung Galaxy A21
Samsung Galaxy A51
Expert Score
Score 4.0
Score 3.6
Samsung Galaxy A21
Samsung Galaxy A51
Samsung Galaxy A21
Samsung Galaxy A51
Score 4.0
Score 3.6
Smartprix
Samsung Galaxy A21
Samsung Galaxy A51
Vote for Your option
Samsung Galaxy A21
Vote for Your option
Samsung Galaxy A51
Benchmarks
AnTuTu Score
Samsung Galaxy A21
130,115
Samsung Galaxy A51
276,261 +112.32%
The score reflects a device's overall performance by summing up results from tests of RAM speed, CPU, and 2D/3D graphics.
Geekbench 6 · Multi-Core
Samsung Galaxy A21
745
Samsung Galaxy A51
1,052 +41.21%
Measures the aggregate performance of all processor cores in a device, simulating tasks optimized for multi-threaded processing.
Geekbench 6 · Single-Core
Samsung Galaxy A21
165
Samsung Galaxy A51
331 +100.61%
Measures the performance of a single processor core by assessing how efficiently the device handles single-threaded processing-based tasks.
Geekbench 5 · Multi-Core
Samsung Galaxy A21
691
Samsung Galaxy A51
1,164 +68.45%
Measures the aggregate performance of all processor cores in a device, simulating tasks optimized for multi-threaded processing in Geekbench 5.
Geekbench 5 · Single-Core
Samsung Galaxy A21
176
Samsung Galaxy A51
331 +88.07%
Measures the performance of a single processor core in a device, evaluating its efficiency in handling single-threaded tasks in Geekbench 5.
Battery Performance
Samsung Galaxy A21
Samsung Galaxy A51
Battery Life
Charging timeComparison videos
50,000+ views
Samsung Galaxy A21 vs Samsung Galaxy A51 - Who Will Win?
About Products
Samsung Galaxy A21
The Samsung Galaxy A21 is a budget-friendly smartphone that delivers a solid performance for everyday tasks. It features a 6.5-inch Infinity-O display, providing vibrant colors and an immersive viewing experience, making it ideal for watching videos and browsing social media. Powered by an octa-core processor and 3GB of RAM, the A21 handles multitasking and apps efficiently.
The quad-camera system on the rear includes a 16MP main sensor, an 8MP ultra-wide, and 2MP depth and macro lenses, offering versatility for photography. The 13MP front camera ensures clear selfies and video calls. The 4,000mAh battery ensures all-day use, and with 15W fast charging, you can quickly power up when needed.
Samsung Galaxy A51
The Samsung Galaxy A51 is a feature-rich smartphone that offers a vibrant 6.5-inch Super AMOLED display, perfect for streaming and gaming with stunning colors and clarity. It’s equipped with a quad-camera setup, including a 48MP main lens, 12MP ultra-wide, 5MP macro, and 5MP depth sensor, delivering versatile photography options.
The 32MP front camera ensures high-quality selfies and video calls. Powered by the Exynos 9611 chipset and 4GB or 8GB of RAM, it provides smooth performance for daily tasks and multitasking. The 4000mAh battery supports 15W fast charging, ensuring you stay powered throughout the day. With a sleek design, in-display fingerprint sensor, and One UI for a user-friendly experience, the Galaxy A51 is a solid choice for those seeking a balance of style, performance, and camera capabilities.
Technical Specifications
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Specs
Samsung Galaxy A21
Samsung Galaxy A51
Design
Weight
193 g (6.81 ounces)
172 g (6.07 ounces)
Thickness
8.1 mm (0.32 inches)
7.9 mm (0.31 inches)
Width
76.7 mm (3.02 inches)
73.6 mm (2.9 inches)
Height
167.8 mm (6.61 inches)
158.5 mm (6.24 inches)
Volume
104.25 cm³
92.16 cm³
Color options
Black
Prism Crush Black, Prism Crush White, Prism Crush Blue, Prism Crush Pink
Display
Screen size
6.4"
6.5"
Display type
IPS, LCD
OLED/AMOLED
Pixel density
274 ppi
405 ppi
Resolution
720 x 1600 px
1080 x 2400 px
Refresh rate
-
60Hz
Has branded damage-resistant glass
-
✔
Gorilla Glass version
-
Gorilla Glass 3
Always-On Display
-
✔
Contrast ratio
-
20:1
Has a touch screen
✔
✔
Performance
Internal storage
32GB
64GB, 128GB, 256GB
RAM
3GB
4GB, 6GB, 8GB
Android version
Android 10
Android 10
CPU speed
4 x 2.3 GHz & 4 x 1.8 GHz
4 x 2.3 GHz & 4 x 1.7 GHz
GPU clock speed
650 MHz
650 MHz
Has integrated LTE
✔
✔
RAM speed
1600 MHz
2133 MHz
Semiconductor size
12 nm
10 nm
Supports 64-bit
✔
✔
DirectX version
DirectX 10
DirectX 12
Has integrated graphics
✔
✔
OpenGL version
3.2
-
OpenGL ES version
3.2
3.2
Uses big.LITTLE technology
✔
✔
CPU threads
8 threads
8 threads
Uses HMP
✔
✔
Has TrustZone
✔
✔
Maximum memory bandwidth
14.9 GB/s
11.92 GB/s
OpenCL version
1.2
2
EMMC version
5.1
5.1
DDR memory version
4
4
Maximum memory amount
6GB
8GB
Thermal Design Power (TDP)
5W
8W
Release date
2020
2019
Has NX bit
✔
✔
Has an external memory slot
✔
✔
GPU turbo
680 MHz
850 MHz
Memory channels
-
4
Maximum amount of external memory supported
128GB
1000GB
L1 cache
-
64 KB
Bits executed at a time
128
128
VFP version
4
4
Number of transistors
-
3000 million
Cameras
Main camera
13 MP & 5 MP & 2 MP & 2 MP
48 MP & 12 MP & 5 MP & 5 MP
Front camera
8MP
32MP
Video recording (main camera)
1080 x 30 fps
2160 x 30 fps
Wide aperture (main camera)
-
f/2 & f/2.2 & f/2.4 & f/2.2
Has a BSI sensor
-
✔
Has phase-detection autofocus for photos
✔
✔
Supports slow-motion video recording
-
✔
Has a built-in HDR mode
✔
✔
Has a flash
✔
✔
Has manual exposure
-
✔
Has a dual-lens (or multi-lens) main camera
✔
✔
Optical zoom
-
0x
Number of flash LEDs
1
1
Has a CMOS sensor
✔
-
Has manual ISO
✔
✔
Has a serial shot mode
✔
✔
Has manual focus
-
✔
Has a front camera
✔
✔
Has manual white balance
✔
✔
Has touch autofocus
✔
✔
Has manual shutter speed
-
✔
Can create panoramas in-camera
✔
✔
Wide aperture (front camera)
f/2.0
f/2.2
Has timelapse function
-
✔
Pixel size (main camera)
-
0.8 µm & 1.12 µm & 1.12 µm & 1.12 µm
Operating system
Has theme customization
✔
✔
Has dark mode
✔
✔
Has focus modes
✔
✔
Has customizable notifications
✔
✔
Supports split screen
✔
✔
Supports instant markup
✔
✔
Supports PiP and PaP
✔
✔
Has sharing intents
✔
✔
Has a child lock
✔
✔
Is free and open source
✔
✔
Tracks the current position of a mobile device
✔
✔
Is a multi-user system
✔
✔
Supports widgets
✔
✔
The browser has word wrap
✔
✔
Has voice commands
✔
✔
Has offline voice recognition
✔
✔
More languages supported
125
125
Battery
Battery power
4000 mAh
4000 mAh
Supports fast charging
✔
✔
Charging speed
-
25W
Has a battery level indicator
✔
✔
Has a rechargeable battery
✔
✔
Audio
Has LDAC
✔
-
Has aptX
✔
-
Number of microphones
2
2
Has a socket for a 3.5 mm audio jack
✔
✔
Has a radio
✔
✔
Features
Wi-Fi version
Wi-Fi 4 (802.11n)
Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
Download speed
150 MBits/s
600 MBits/s
Upload speed
50 MBits/s
150 MBits/s
Has USB Type-C
✔
✔
USB version
2
2
Has NFC
✔
✔
SIM cards
1 SIM
2 SIM
Has a fingerprint scanner
✔
✔
Bluetooth version
5
5
Has a gyroscope
✔
✔
Has GPS
✔
✔
Has a compass
✔
✔
Supports Wi-Fi
✔
✔
Has a cellular module
✔
✔
Supports Galileo
-
✔
Has an accelerometer
✔
✔
Body sar (eu)
-
1.59W/kg
Supports ant+
-
✔
Head SAR (eu)
-
0.36W/kg
Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
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Samsung Galaxy A21
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Samsung Galaxy A51
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