Samsung Galaxy A51 vs Oppo Reno 4

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 Oppo Reno 4, which is powered by Qualcomm Snapdragon 720G and came out 6 months after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Samsung Galaxy A51
  • Slow-motion recording at 960FPS
  • More recent OS version: Android 12 versus 10
  • The front-facing camera can record video at 4K
Reasons to consider the Oppo Reno 4
  • 43% better performance in AnTuTu Benchmark (309K versus 216K)
  • Delivers 26% higher maximum brightness (797 against 632 nits)
  • Newer Bluetooth version (v5.1)
  • Faster storage type - UFS 2.1 versus UFS 2.0
  • More energy-efficient CPU – Snapdragon 720G
  • 64% faster in single-core GeekBench 5 test: 570 and 348 points
  • The phone is 6-months newer

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

Value for money

You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money.
Price

Tests and specifications

Comparison table of technical specifications and tests
Phone:
vs

Display

Type Super AMOLED OLED
Size 6.5 inches 6.4 inches
Resolution 1080 x 2400 pixels 1080 x 2400 pixels
Aspect ratio 20:9 20:9
PPI 405 ppi 411 ppi
Refresh rate 60 Hz 60 Hz
HDR support No No
Screen protection Corning Gorilla Glass 3 Corning Gorilla Glass 3
Screen-to-body ratio 87.4% 84.7%
Display features - Always-On Display - Always-On Display
Display tests
RGB color space 98.8% -
PWM 242 Hz -
Response time 25 ms -
Contrast ∞ Infinity -
Max. Brightness
632 nits
Reno 4 +26%
797 nits
Sources: NotebookCheck [3]

Design and build

Height 158.5 mm (6.24 inches) 160.3 mm (6.31 inches)
Width 73.6 mm (2.9 inches) 73.9 mm (2.91 inches)
Thickness 7.9 mm (0.31 inches) 7.7 mm (0.3 inches)
Weight 172 gramm (6.07 oz) 165 gramm (5.82 oz)
Waterproof No No
Rear material Plastic Plastic
Frame material Plastic Plastic
Colors White, Black Black, Blue, Purple
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
87.4%
84.7%

Performance

Tests of Samsung Galaxy A51 and Oppo Reno 4 in the benchmarks
SoC
Chipset Samsung Exynos 9 Octa 9611 Qualcomm Snapdragon 720G
Max. clock 2300 MHz 2300 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 1.8 GHz: Kryo 465 Silver (Cortex-A55)
- 2 cores at 2.3 GHz: Kryo 465 Gold (Cortex-A76)
L3 cache - 1 MB
Lithography process 10 nanometers 8 nanometers
Graphics Mali-G72 MP3 Adreno 618
GPU clock 850 MHz 750 MHz
FLOPS ~259 GFLOPS ~435 GFLOPS
Memory
RAM size 4, 6 GB 8 GB
Memory type LPDDR4X LPDDR4X
Memory clock 1866 MHz 2133 MHz
Channels 2 2
Storage
Storage size 64, 128 GB 128 GB
Storage type UFS 2.0 UFS 2.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 512 GB

Benchmarks

Geekbench 5 (Single-Core)
Reno 4 +64%
570
Geekbench 5 (Multi-Core)
1277
Reno 4 +39%
1777
AnTuTu Benchmark 9
216577
Reno 4 +43%
309629
CPU 49711 96650
GPU 53719 81422
Memory 43824 55661
UX 70475 78522
Total score 216577 309629
3DMark Wild Life Performance
n/a
Stability 95% -
Graphics test 4 FPS -
Graphics score 812 -
Sources: 3DMark [3]

Software

Operating system Android 10 (Can be upgraded to Android 12) Android 10
ROM One UI 4.1 ColorOS 7.2
OS size 23 GB -

Battery

Specifications
Capacity 4000 mAh 4015 mAh
Charge power 15 W 30 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 (50% in 35 min)
Full charging time 1:50 hr 1:15 hr
Battery life tests
Web browsing 09:34 hr -
Watching video 11:29 hr -
Gaming 05:12 hr -
Standby 83 hr -
General battery life
26:33 hr
n/a

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 48 megapixels
Image resolution 8000 x 6000 8000 x 6000
Zoom Digital Digital
Flash LED Dual LED
Stabilization Digital Digital
8K video recording No No
4K video recording Up to 30FPS Up to 30FPS
1080p video recording Up to 30FPS Up to 60FPS
Slow motion 960 FPS (720p) 120 FPS (720p)
Angle of widest lens 120° 119°
Lenses 4 (48 MP + 12 MP + 5 MP + 5 MP) 4 (48 MP + 8 MP + 2 MP + 2 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
- 48 MP
- Aperture: f/1.7
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.25", Sony IMX586 (Exmor-RS CMOS)
- Phase autofocus
Ultra-wide lens - 12 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
- 8 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
Macro lens - 5 MP
- Aperture: f/2.4
- Focal length: 40 mm
- Pixel size: 1.12 micron
- 2 MP
- Aperture: f/2.4
Depth lens - 5 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
- 2 MP
- Aperture: f/2.4
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
Selfie camera
Megapixels 32 megapixels 32 megapixels
Image resolution 6560 x 4928 6528 x 4896
Aperture f/2.2 f/2.4
Focal length 26 mm 26 mm
Pixel size 0.8 microns 0.8 microns
Sensor type ISOCELL CMOS ISOCELL CMOS
Sensor size 1/2.8" 1/2.8"
Video resolution 2160p (4K) at 30 FPS 1080p (Full HD) at 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 b/g/n/ac) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5.1
Bluetooth features PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP LE, A2DP
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo GPS, GLONASS, Beidou, Galileo, QZSS
NFC* Yes Yes
Infrared port No No
Network
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 20
5G support No No

Sound

Speakers Mono Mono
Headphone audio jack Yes Yes
FM radio Yes Yes
Dolby Atmos Yes Yes
Speakers test
Max. loudness
81.7 dB
n/a

Other

Category Mid-range Mid-range
Announced December 2019 June 2020
Release date December 2019 July 2020
SAR (head) 0.596 W/kg -
SAR (body) 1.45 W/kg -
Sensors - Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

If the display, performance, battery life, and connectivity are more important to you, then choose the Oppo Reno 4. But if the software, camera, and sound are more of a priority – go for the Samsung Galaxy A51.

Cast your vote

So, which phone would you choose?
11 (52.4%)
10 (47.6%)
Total votes: 21

User opinions

You can share your opinion or ask a question in the comments below
Promotion