Oppo A91 vs Samsung Galaxy A51: Comparison

Comparison of features, performance, design, battery, camera and connectivity between the following smartphones: Oppo A91 vs Samsung Galaxy A51. The complete information of specifications to decide which to buy.

Compare
Oppo A91Oppo A91Global · 8GB · 128GB
Samsung Galaxy A51Samsung Galaxy A51Global · 4GB · 128GB · A515F
Technical data sheets

Basics
Oppo A91
Oppo A91
Global · 8GB · 128GB
View datasheet
vs
Samsung Galaxy A51
Samsung Galaxy A51
Global · 4GB · 128GB · A515F
View datasheet
vs

Score
Ki Cost-effective
Score		 6.7 Ki Cost-effective
Score 		7.7 Ki Cost-effective
Score
Design and Screen score 5.7Design & Materials 6.8Design & Materials
Performance and Hardware score 5.5Performance & Hardware 5.7Performance & Hardware
Camera score 5.8Camera 6.9Camera
Connectivity score 5.7 Connectivity 7.3 Connectivity
Battery score 5.2 Battery 5.2 Battery

User reviews
User score
--
4 reviews
7.4
109 reviews

Technical specifications of the Oppo A91 vs Samsung Galaxy A51

Specs Oppo A91 prices Oppo A91
Global · 8GB · 128GB 		Samsung Galaxy A51 prices Samsung Galaxy A51
Global · 4GB · 128GB · A515F
Inches 6.4" 6.5"
Resolution FHD+ FHD+
Usable surface 84% useful 88% useful
Aspect Ratio 20:9 19.5:9
Dimensions 73.3 mm
160.2 mm
7.9 mm 		73.6 mm
158.5 mm
7.9 mm
Weight 172 g 172 g
Micro Helio P70
Octa-Core 		Exynos 9611
Octa-Core
RAM 8 GB RAM 4 GB RAM
Storage 128 GB 128 GB
AnTuTu 151.661
v8 		179.753
v8
Battery 4025 mAh 4000 mAh
Main Camera 1
48 Mpx · ƒ/1.8

2 3 4 		1
48 Mpx · ƒ/2.0
IMX582 Exmor RS
2 3 4
Selfie Camera SELF 30 Mpx · ƒ/2.0 SELF 32 Mpx · ƒ/2.2
Bands
OS Android 9.0 P Android 13 Tiramisu

Brand
Brand Oppo Samsung
Aliases PCPM00, PCPT00 SM-A515F

Release Date
Release date December 2019,
4 years ago 		December 2019,
4 years ago
State On Sale On Sale
Market Global Global

Design & Materials

Structure

Oppo A91
Samsung Galaxy A51
Oppo A91
Samsung Galaxy A51
Size
73.3 mm • 160.2 mm • 7.9 mm
See more details
 Print 3D Model
73.6 mm • 158.5 mm • 7.9 mm
See more details
 Print 3D Model
Weight 172 g 172 g
Usable surface 84 % 88 %
Materials Glass Plastic
Resistance - -
Colors
White

Blue

Red
Black

White

Blue

Pink

Screen
Diagonal 6.4" 6.5"
Type AMOLED Super AMOLED
Aspect Ratio 20:9 19.5:9
Resolution FHD+
1080 x 2400 px 		FHD+
1080 x 2340 px
Density 411 Pixels per inch 396 Pixels per inch

Others

Others
  • Water Drop Notch
  • Scratch resistant
  • Capacitive
  • Multi-touch
  • Frameless
  • Hole-punch Notch
  • Scratch resistant
  • Capacitive
  • Multi-touch
  • Frameless

User reviews

Is it a drop-resistant and scratch-resistant smartphone?
--
6.7
Do you think it's a nice phone?
--
8.2
Is it comfortable?
--
8.3
Can you see it well in the sunlight?
--
7.7
Number of reviews
--
109 reviews

Performance & Hardware

Processor
Model MediaTek Helio P70 (MT6771V/CT) Samsung Exynos 7 Octa 9611
CPU 4x Cortex-A73 2.1 GHz + 4x Cortex-A53 1.95 GHz 4x Cortex-A73 2.3 GHz + 4x Cortex-A53 1.67 GHz
Type Octa-Core Octa-Core
Manufacturing 12 nm 10 nm
64 Bits Yes Yes

Graphics
GPU ARM Mali-G72 MP3 ARM Mali-G72 MP3

RAM
RAM 8 GB 4 GB
Type LPDDR4X RAM LPDDR4X RAM

Antutu
Score
151.661
Antutu v8
Overall performance better than 54% of devices
See more details
179.753
Antutu v8
Overall performance better than 56% of devices
See more details

Storage
Capacity 128 GB 128 GB
Type -- --
SD Slot Yes ,
Slot for SD or second SIM card 		Yes ,
Independent SD slot

Security
Fingerprint Yes, in screen Yes, in screen

Sensors
Sensors
  • Fingerprint
  • Proximity
  • Light sensor
  • Accelerometer
  • Compass
  • Gyroscope
  • Gravity
  • Fingerprint
  • Proximity
  • Light sensor
  • Accelerometer
  • Compass
  • Gyroscope

Audio

Audio
-
-

Others
Notifications LED -- --
Cooling system No No
Gaming buttons No No

User reviews

Does it have good sound?
--
7.3
Does it work smoothly in everyday use?
--
6.8
What's your experience been with demanding games?
--
5.7
Number of reviews
--
109 reviews

Camera

Main
No. of cameras Quad rear camera Quad rear camera
1
Camera type

Standard

Standard
Resolution 48 Mpx 48 Mpx
Sensor Unknown Sony IMX582 Exmor RS
Type CMOS BSI CMOS
Aperture ƒ/ 1.8 ƒ/ 2.0
ISO -- --
Pixel size 0.80 µm 0.80 µm
Pixel Binning -- 1-4 (2x2)
Sensor size -- 1/2"
2
Camera type

Wide Angle lens

Wide Angle lens
Resolution
8 Mpx
12 Mpx
Sensor
Unknown
Unknown
Type
--
--
Aperture
ƒ/ 2.25
ƒ/ 2.2
Pixel size
1.12 µm
1.12 µm
Pixel Binning
--
--
Sensor size
--
--
3
Camera type

Macro lens

Portrait mode (depth)
Resolution
2 Mpx
5 Mpx
Sensor
Unknown
Unknown
Type
--
--
Aperture
ƒ/ 2.4
ƒ/ 2.2
Pixel size
1.75 µm
1.12 µm
Pixel Binning
--
--
Sensor size
--
--
4
Camera type

Black & white

Macro lens
Resolution
2 Mpx
5 Mpx
Sensor
Unknown
Unknown
Type
--
--
Aperture
ƒ/ 2.4
ƒ/ 2.4
Pixel size
1.75 µm
1.12 µm
Pixel Binning
--
--
Sensor size
--
--

Features
Flash Dual LED LED
Optical Stabilisation No No
Slow Motion Video Yes,
120 fps 		Yes,
120 fps
Others
  • Digital zoom
  • Quadruple camera
  • Digital image stabilization
  • Autofocus
  • Touch focus
  • Manual focus
  • Laser AF
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Scene mode
  • Self-timer
  • 4K Video
  • Digital zoom
  • Quadruple camera
  • Digital image stabilization
  • Autofocus
  • Touch focus
  • Continuous shooting
  • Geotagging
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Exposure compensation
  • Scene mode
  • Self-timer

Selfie
SELF
Camera type

Dedicated

Dedicated
Resolution 30 Mpx 32 Mpx
Sensor Unknown Sony IMX616
Type -- CMOS
Aperture ƒ/ 2.0 ƒ/ 2.2
Pixel size -- 0.80 µm
Pixel Binning -- 1-4 (2x2)
Sensor size -- 1/2.8"
Others
--
--

DxOMark Score
DxOMark Score -- --

User reviews

Quality of daytime photos
--
8.3
Quality of nighttime photos
--
6.5
Quality of selfies
--
7.9
Does it have a powerful flash?
--
8.0
Number of reviews
--
109 reviews

Connectivity

Network compatibility

5G -- --
4G LTE
  • B1 (2100)
  • B3 (1800)
  • B5 (850)
  • B7 (2600)
  • B8 (900)
  • B20 (800)
  • B28b (700)
  • B28a (700)
  • B38 (TDD 2600)
  • B40 (TDD 2300)
  • B41 (TDD 2500)
  • B1 (2100)
  • B2 (1900)
  • B3 (1800)
  • B4 (1700/2100 AWS 1)
  • B5 (850)
  • B7 (2600)
  • B8 (900)
  • B12 (700)
  • B13 (700)
  • B17 (700)
  • B20 (800)
  • B26 (850)
  • B28b (700)
  • B28a (700)
  • B38 (TDD 2600)
  • B40 (TDD 2300)
  • B41 (TDD 2500)
  • B66 (1700/2100)
3G
  • B1 (2100)
  • B5 (850)
  • B8 (900)
  • B1 (2100)
  • B2 (1900)
  • B4 (1700/2100 AWS A-F)
  • B5 (850)
  • B8 (900)
2G
  • B2 (1900)
  • B3 (1800)
  • B5 (850)
  • B8 (900)
  • B2 (1900)
  • B3 (1800)
  • B5 (850)
  • B8 (900)

SIM card
Dual SIM Dual Sim Dual Standby Dual Sim Dual Standby
Type
  • Nano SIM
  • Nano SIM
  • Nano SIM
  • Nano SIM

Wi-Fi
Wi-Fi
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 802.11n 5GHz
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 802.11n 5GHz
  • 802.11ac
Others
  • Dual band
  • Wi-Fi Hotspot
  • Wi-Fi Direct
  • Wi-Fi Display
  • Dual band
  • Wi-Fi Hotspot
  • Wi-Fi Direct
  • Wi-Fi Display

Bluetooth
Version Bluetooth 4.2 LE Low energy consumption Bluetooth 5.0
Others
  • A2DP (Advanced Audio Distribution Profile)
  • LE (Low Energy)
  • A2DP (Advanced Audio Distribution Profile)
  • AVRCP (Audio/Visual Remote Control Profile)
  • DIP (Device ID Profile)
  • HFP (Hands-Free Profile)
  • HID (Human Interface Profile)
  • HSP (Headset Profile)
  • MAP (Message Access Profile)
  • PAN (Personal Area Networking Profile)
  • OPP (Object Push Profile)
  • PBAP/PAB (Phone Book Access Profile)
  • HOGP
  • ANT+

Navigation
Navigation
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • Galileo

USB
USB
  • Charging
  • Mass Storage
  • USB On-The-Go (OTG)
  • USB Type C
  • Charging
  • Mass Storage
  • USB On-The-Go (OTG)
  • USB Type C

SAR
European measurement

The European Union sets a limit of 2 W/kg averaged over 10 grams of tissue.

 -- --
American measurement

The FCC limit is 1.6 W/kg measured in a volume of 1 gram of tissue

 -- --

Others
Others
  • Audio Jack
  • Radio FM
  • Computer sync
  • Tethering.
  • VoLTE
  • NFC
  • Audio Jack
  • Radio FM
  • Computer sync
  • OTA sync
  • Tethering.
  • VoLTE
  • ANT+

User reviews

Does it have good coverage for calls?
--
8.3
Quality of the GPS
--
8.5
And the WiFi?
--
8.3
Number of reviews
--
109 reviews

Battery

Battery
Capacity
4025 mAh
See more details
4000 mAh
See more details
Type Li-Polymer Li-Polymer
Fast charge Yes,
20.0W 		Yes,
15.0W
Others
  • Non-removable
  • Non-removable

User reviews

How long does the battery last?
--
  • 5%
    Less than half day
  • 30%
    Less than a day
  • 41%
    One day
  • 22%
    More than one day
  • 3%
    Two days or more
Number of reviews
--
109 reviews

Software

Software
Operating System
  • ColorOS 6 (Android 9.0 Pie)
    Android 9.0 P, 5 years ago
  • Android 13
    Android 13 Tiramisu, 1 year ago
Google Services (official) Yes Yes

User reviews

Did it come with preinstalled applications?
--
  • 4%
    It comes with a clean operating system
  • 70%
    It has preinstalled apps but they don't bother me
  • 26%
    It has preinstalled apps that I can't uninstall
Do you regularly receive updates?
--
  • 2%
    Never
  • 6%
    Once a year
  • 49%
    Every six months
  • 43%
    Every two months or less
Number of reviews
--
109 reviews
Prices
From $ 162 --
From $ 150 --

Others

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