Samsung Galaxy A51 vs Galaxy A20

52 out of 100

43 out of 100

Here we compared two mid-range smartphones: the 6.5-inch Samsung Galaxy A51 (with Exynos 9 Octa 9611) that was released on December 12, 2019, against the Samsung Galaxy A20, which is powered by Exynos 7 Octa 7884 and came out 9 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.

Differences
Review
Specs
Benchmarks
Battery life
Camera
Comments (1)

Key differences

An overview of the main advantages of each smartphone

Reasons to consider the Samsung Galaxy A51

51% higher pixel density (405 vs 268 PPI)
Slow-motion recording at 960FPS
Uses a faster type of memory: LPDDR4X 1866 MHz
More recent OS version: Android 13 versus 11
27% better performance in AnTuTu Benchmark (246K versus 194K)
Ability to record video in 4K resolution
Compatible with Wi-Fi 5 wireless networks
More energy-efficient CPU – Exynos 9 Octa 9611
The front-facing camera can record video at 4K

Review

Evaluation of Samsung Galaxy A51 and Galaxy A20 crucial features

Display

Screen quality, color accuracy, brightness

Type	Super AMOLED	Super AMOLED
Size	6.5 inches	6.4 inches
Resolution	1080 x 2400 pixels	720 x 1560 pixels
Aspect ratio	20:9	19.5:9
PPI	405 ppi	268 ppi
Refresh rate	60 Hz	60 Hz
Adaptive refresh rate	No	No
Max rated brightness	400 nits	400 nits
HDR support	No	No
Screen protection	Corning Gorilla Glass 3	Corning Gorilla Glass 3
Screen-to-body ratio	87.4%	85%
Display features	- Always-On Display	-

RGB color space	98.8%	-
PWM	242 Hz	-
Response time	25 ms	-
Contrast	∞ Infinity	-

Height	158.5 mm (6.24 inches)	158.4 mm (6.24 inches)
Width	73.6 mm (2.9 inches)	74.7 mm (2.94 inches)
Thickness	7.9 mm (0.31 inches)	7.8 mm (0.31 inches)
Weight	172 g (6.07 oz)	169 g (5.96 oz)
Waterproof	No	No
Rear material	Plastic	Plastic
Frame material	Plastic	Plastic
Colors	White, Black	-
Fingerprint scanner	Yes, in-display	Yes, rear

Chipset	Samsung Exynos 9 Octa 9611	Samsung Exynos 7 Octa 7884
Max clock	2300 MHz	1600 MHz
CPU cores	8 (4 + 4)	8 (2 + 6)
Architecture	- 4 cores at 1.7 GHz: Cortex-A53 - 4 cores at 2.3 GHz: Cortex-A73	- 6 cores at 1.35 GHz: Cortex-A53 - 2 cores at 1.6 GHz: Cortex-A73
Lithography process	10 nanometers	14 nanometers
Graphics	Mali-G72 MP3	Mali-G71 MP2
GPU shading units	54	32
GPU clock	850 MHz	850 MHz
FLOPS	~91.8 GFLOPS	~49.3 GFLOPS

CPU	69792	59250
GPU	55670	25224
Memory	60677	51139
UX	59872	57141
Total score	246594	194290

Max surface temperature	42.2 °C	-
Stability	95%	85%
Graphics test	4 FPS	1 FPS
Graphics score	812	324

RAM size	4, 6 GB	3 GB
Memory type	LPDDR4X	LPDDR3
Memory clock	1866 MHz	933 MHz
Channels	2	1

Storage size	64, 128 GB	32 GB
Storage type	UFS 2.0	eMMC 5.1
Memory card	MicroSD	MicroSD
Memory card max size	Up to 512 GB	Up to 512 GB

Operating system	Android 10 (Can be upgraded to Android 13)	Android 9.0 (Can be upgraded to Android 11)
ROM	One UI 5.0	One UI 3.1
OS size	23 GB	-

Capacity	4000 mAh	4000 mAh
Max charge power	15 W	15 W
Battery type	Li-Po	Li-Po
Replaceable	No	No
Wireless charging	No	No
Reverse charging	No	No
Fast charging	Yes (40% in 35 min)	Yes, Samsung Adaptive Fast Charge (25% in 30 min)
Full charging time	1:50 hr	2:00 hr

Battery life tests
Web browsing	09:34 hr	-
Watching video	11:29 hr	-
Gaming	05:12 hr	-
Standby	83 hr	-

Main camera
Matrix	48 megapixels	13 megapixels
Image resolution	8000 x 6000	4128 x 3096
Zoom	Digital	Digital
Flash	LED	LED
Stabilization	Digital	Digital
8K video recording	No	No
4K video recording	Up to 30FPS	No
1080p video recording	Up to 30FPS	Up to 30FPS
Slow motion	960 FPS (720p)	No
Angle of widest lens	120°	123°
Lenses	4 (48 MP + 12 MP + 5 MP + 5 MP)	2 (13 MP + 5 MP)
Wide (main) lens	- 48 MP - Aperture: f/2.0 - Focal length: 26 mm - Pixel size: 0.8 micron - Sensor: 1/2", Sony IMX582 (Exmor-RS CMOS) - Phase autofocus	- 13 MP - Aperture: f/1.9 - Focal length: 28 mm - Phase autofocus
Ultra-wide lens	- 12 MP - Aperture: f/2.2 - Focal length: 13 mm - Pixel size: 1.12 micron	- 5 MP - Aperture: f/2.2 - Focal length: 12 mm
Macro lens	- 5 MP - Aperture: f/2.4 - Focal length: 40 mm - Pixel size: 1.12 micron	-
Depth lens	- 5 MP - Aperture: f/2.2 - Pixel size: 1.12 micron - Sensor: 1/5.0" (CMOS)	-
Camera features	- Bokeh mode - Pro mode	-

Selfie camera
Megapixels	32 megapixels	8 megapixels
Image resolution	6560 x 4928	3264 x 2448
Aperture	f/2.2	f/2.0
Focal length	26 mm	-
Pixel size	0.8 microns	-
Sensor type	ISOCELL CMOS	CMOS
Sensor size	1/2.8"	-
Video resolution	2160p (4K) at 30 FPS	720p at 30 FPS

Wi-Fi standard	Wi-Fi 5 (802.11 b/g/n/ac)	Wi-Fi 4 (802.11 b/g/n)
Wi-Fi features	- Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display	- Dual Band - Wi-Fi Direct - Wi-Fi Hotspot
Bluetooth version	5	5
Bluetooth features	PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP	PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP
USB type	USB Type-C	USB Type-C
USB version	2	2
USB features	- Charging - USB-Storage mode - OTG	- Charging - USB-Storage mode
GPS	GPS, GLONASS, Beidou, Galileo	GPS, GLONASS, Beidou
NFC *	Yes	Yes
Infrared port	No	No

Number of SIM *	2	2
Type of SIM card	Nano	Nano
Multi SIM mode	Standby	Standby
eSIM support *	No	No
Hybrid slot	No	No
LTE Cat *	12	4
5G support	No	No

Speakers	Mono	Mono
Headphone audio jack	Yes	Yes
FM radio	Yes	Yes
Dolby Atmos	Yes	Yes

Category	Mid-range	Mid-range
Announced	December 2019	March 2019
Release date	December 2019	March 2019
SAR (head)	0.596 W/kg	0.23 W/kg
SAR (body)	1.45 W/kg	1.38 W/kg
Sensors	- Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint	- Hall-effect sensor - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint

Samsung Galaxy A51 vs Galaxy A20

Samsung Galaxy A51 vs Galaxy A20

Key differences

Review

Value for money

Tests and specifications

Display

Design and build

Performance

Benchmarks

Memory

Software

Battery

Camera

Connectivity

Sound

Other

Conclusion