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Compare Oppo A8 VS Oppo A91


Oppo A91 is equipped with Helio P70 SoC, 8 GB RAM, 128 GB storage, 6.4" AMOLED display, 4025 mAh battery with 30W fast charging, 
quad rear camera with 48 MP main sensor + 8 MP ultra-wide + 2 MP macro + 2 MP depth-sensing, 16 MP front camera, and 281 $ price on launch.

While Oppo A8 keeps a 6.5" IPS display, Helio P35 SoC, 4 GB RAM, 128 GB storage, triple rear camera with 13 MP main sensor + 2 MP macro + 2 depth-sensing, 8 MP front camera, 4230 mAh battery and 171 $ price on launch.


Here’s an in-depth specifications comparison between Oppo a91 and Oppo A8.

Jump to:
  1. Operating System  Comparison
  2. System  on  Chip (SOC)  Comparison
  3. RAM Comparison
  4. Storage  Comparison
  5. Display Comparison
  6. Launch Date Comparison
  7. Price  Comparison
  8. Sensors  Comparison
  9. Rear Camera Comparison
  10. Front Camera Comparison
  11. Tracking /  Positioning  Comparison
  12. Wi-Fi  Comparison
  13. Bluetooth  Comparison
  14. USB Comparison
  15. Connectivity  Comparison
  16. Audio File Formats /  Codecs Comparison
  17. Video File Formats /  Codecs Comparison
  18. Battery  Comparison
  19. Design  Comparison
  20. SIM Card  Comparison
  21. Networks  Comparison
  22. Mobile Network Technology and Bandwidth Comparison

Oppo A8

Oppo A91

Brand and Model

Brand and Model

Brand 

Brand 

  Oppo
  OPPO

Model 

Model 

A8
 A91

Model Alias

Model Alias

PDBM00
PCPM00
PDBT00
PCPT00

Oppo A8 Operating System (OS)

A91 Operating System (OS)

ColorOS 6.1 (Android 9.0 Pie)
ColorOS 6.1 (Android 9.0 Pie)

Oppo A8 System on  Chip (SOC)

A91 System on  Chip (SOC)    

SOC 

SOC 

Media Tek Helio P35 (MT6765)
Media Tek Helio P70 (MT6771V/CT)

Process Technology 

Process Technology 

 12 nm 
 12 nm  

CPU

CPU

4x 2.3 GHz ARM Cortex-A53
4x 2.1 GHz ARM Cortex-A73  
4x 1.8 GHz ARM Cortex-A53
4x 2.0 GHz ARM Cortex-A53

CPU Bits 

CPU Bits 

 64 bits 
 64 bits  

Instruction Set  

Instruction Set  

 ARMv8-A
 ARMv8-A

CPU Frequency 

CPU Frequency 

 2300 MHz  
 2100 MHz   

CPU Cores 

CPU Cores 

  8
 8  

GPU

GPU

Power VR GE8320
ARM Mali-G72 MP3

 GPU Cores

GPU Cores


3

GPU Frequency

GPU Frequency

 680 MHz
900 MHz

Oppo A8 RAM Capacity 

A91 RAM Capacity 

  4 GB
  8 GB  

RAM Type  

RAM Type  

 LPDDR4X
 LPDDR4X

RAM Channels  

RAM Channels  

 Double Channel
 Double Channel

RAM Frequency  

RAM Frequency  

 1866 MHz
 1866 MHz

Other Features

Other Features 


 Game Boost 2.0

Oppo A8 Storage 

A91 Storage 

  128 GB
  128 GB

Oppo A8 Memory Cards 

A91 Memory Cards 

  microSD
  microSD
 microSDHC
 microSDHC
 microSDXC
 microSDXC

Oppo A8 Display    

A91 Display    

Type / Technology 

Type / Technology 

IPS
AMOLED

Diagonal Size 

Diagonal Size 

  6.5 in 
  6.4 in 
  165.1 mm 
  162.56 mm 
  16.51 cm 
  16.26 cm 

Width 

Width 

  2.67 in 
  2.63 in 
  67.75 mm 
  66.71 mm 
  6.78 cm 
  6.67 cm 

Height 

Height 

  5.93 in 
  5.84 in 
  150.56 mm 
  148.24 mm 
  15.06 cm 
  14.82 cm 

Aspect Ratio 

Aspect Ratio 

 2.222:1
 2.222:1

Resolution 

Resolution 

 720 x 1600  pixels 
 1080 x 2400  pixels 

Pixel Density 

Pixel Density 

  270 ppi 
  411 ppi 
  106 ppcm 
 161 ppcm 

Color Depth 

Color Depth 

  24 bits  
  24 bits  
  16777216 colors 
  16777216 colors 

Display Area 

Display Area 

  82.7 % 
  84.49 % 

Other Features 

Other Features 

 Capacitive 
 Capacitive 
 Multi-touch 
 Multi-touch 
Scratch-resistant 
 Scratch resistant

Oppo A8 Sensors 

A91 Sensors 

 Proximity
 Proximity
 Light
 Light
 Accelerometer
 Accelerometer
 Compass
 Compass
Gyroscope
Gyroscope
  Fingerprint
  Fingerprint

 In-display fingerprint sensor
 Gravity
Gravity

Oppo A8 Rear Camera 

A91 Rear Camera 

Aperture

Aperture

 f/2
 f/1.8

Flash Type

Flash Type

LED
Dual LED

 Image Resolution 

 Image Resolution 

 4032 x 3120  pixels 
 8000 x 6000  pixels 
 12.58 MP 
 48 MP 

Video resolution

Video resolution

 1920 x 1080 pixels
 3840 x 2160 pixels
 2.07 MP
 8.29 MP

Video FPS

Video FPS

 30 fps
 30 fps

Features 

Features 

Autofocus 
Autofocus 
Geotagging 
Geotagging 
Panorama 
Panorama 
HDR 
HDR 
Touch focus 
Touch focus 
Face detection
Face detection
White balance setting 
White balance setting 
ISO setting 
ISO setting 
Exposure compensation 
Exposure compensation 
Self-timer 
Self-timer 
Scene mode 
Scene mode 
Macro Mode
Macro mode 

Pixel size- 0.8 um

Pixel size- 1.6 um (4-in-1 pixel binning)

Phase detection autofocus (PDAF)
 5-element lens 
6-elemet lens 

Secondary rear camera- 2 MP (Macro)

Secondary rear camera- 8 MP Hynix HI846 (ultra-wide)


 5-element lens (#2)

Angle of view- 119 degree (#2) 

Third rear camera- 2 MP depth-sensing)

Third rear camera- 2 MP (depth-sensing)


 3-elemet lens (#3)

 

Fourth rear camera- 2 MP (macro)


 3-element lens (#4)

Oppo A8 Front Camera    

A91 Front Camera    

Aperture
Aperture
 f/2.2
 f/2

Image Resolution 

Image Resolution 

 3264 x 2448 pixels 
 4608 x 3456 pixels 
  7.99 MP 
  15.93 MP 

Video Resolution

Video Resolution

 1920 x 1080 pixels
 1920 x 1080 pixels
 2.07 MP
 2.07 MP

Video FPS

Video FPS

 30 fps
 30 fps

Oppo A8 Audio 

A91 Audio 

Loudspeaker 
Loudspeaker 
Earpiece
Earpiece

Oppo A8 Radio 

A91 Radio 

  Yes
Yes

Oppo A8 Tracking /  Positioning 

A91 Tracking /  Positioning 

 GPS 
 GPS 
 A-GPS 
 A-GPS 
GLONASS
GLONASS
BeiDou
BeiDou

Oppo A8 Wi-Fi    

A91 Wi-Fi    

 802.11a (IEEE 802.11a-1999)
 802.11a (IEEE 802.11a-1999)
 802.11b (IEEE 802.11b-1999)
 802.11b (IEEE 802.11b-1999)
802.11g (IEEE 802.11g-2003)
802.11g (IEEE 802.11g-2003)
802.11n (IEEE 802.11n-2009) 
802.11n (IEEE 802.11n-2009) 
 802.11n 5GHz
 802.11n 5GHz
 802.11 ac (IEEE 802.11ac)
 802.11 ac (IEEE 802.11ac)
Dual band
Dual band
 Wi-Fi Hotspot 
 Wi-Fi Hotspot 
 Wi-Fi Direct
 Wi-Fi Direct
 Wi-Fi Display
 Wi-Fi Display

Oppo A8 Bluetooth 

A91 Bluetooth 

Version 

Version 

 4.2
 5.0

Features 

Features 

A2DP 
A2DP 
 LE
 LE

Oppo A8 USB 

A91 USB 

Connector Type  

Connector Type  

Micro USB
USB Type-C

Version 

Version 

  2.0
  2.0

Features 

Features 

Charging 
Charging 
Mass Storage 
Mass Storage 
On-The-Go
On-The-Go

Oppo A8 Headphone Jack 

A91 Headphone Jack 

 Yes
 Yes

Oppo A8 Connectivity 

A91 Connectivity 

 Computer sync 
 Computer sync 

 OTA sync 
 Tethering
 Tethering
  VoLTE
 VoLTE

Oppo A8 Browser 

A91 Browser 

HTML 
HTML 
HTML5 
HTML5 
CSS 3 
CSS 3 

Oppo A8 Audio File Formats /  Codecs    

A91 Audio File Formats /  Codecs    

AAC 
AAC 
AAC+ / aaPlus / HE-AAC v1
AAC+ / aaPlus / HE-AAC v1
AMR / AMR-NB / GSM-AMR 
AMR / AMR-NB / GSM-AMR 
 AMR-WB
 AMR-WB
eAAC+ / aacPlus v2 / HE-AAC v2
eAAC+ / aacPlus v2 / HE-AAC v2
FLAC 
FLAC 
MIDI 
MIDI 
MP3 
MP3 
OGG 
OGG 
WMA 
WMA 
WAV 
WAV 

Oppo A8 Video File Formats /  Codecs    

A91 Video File Formats /  Codecs    

3GPP 
3GPP 
AVI 
AVI 
DivX
DivX
Flash Video 
Flash Video
 H.263
 H.263
 H.264 / MPEG-4 Part 10 / AVC video
 H.264 / MPEG-4 Part 10 / AVC video
 H.265 / MPEG-H Part 2 / HEVC

MKV
MKV
 MP4
MP4
 WebM
WebM
 WMV
MWV
Xvid
Xvid

Oppo A8 Battery 

A91 Battery 

Capacity

Capacity

4230 mAh
4025 mAh

Type 

Type 

 Li-Polymer
 Li-Polymer

Features 

Features 

 Non-removable 
 Non-removable 

 Fast charging

 Charger Output Power

 Charger Output Power


5 V / 2 A 

 Quick Charge Technology

 Quick Charge Technology


 VOOC 3.0

Oppo A8 Launch 

A91 Launch 

Announced 

Announced 

 2019, 20th December
 2019, 20th December

Status 

Status 

 Release 20th December
 Release 20th December 2019

Oppo A8 Price 

A91 Price 

 4 GB + 128 GB = 171 $
8 GB + 128 GB = 285 $

Oppo A8 Design

A91 Design    

Colors 

Colors 

Secret Night Black
 Dark Night
Azure
Modern Bright Red

White-Blue-Purple gradient

Width 

Width 

  75.5 mm 
  73.3 mm 
  7.55 cm 
  7.33 cm 
  0.25 ft 
  0.24 ft 
  2.97 in 
  2.89 in 

Height 

Height 

 163.9 mm 
 160.2 mm 
 16.39 cm 
 16.02 cm 
  0.54 ft 
  0.53 ft 
  6.45 in 
  6.31 in 

Thickness 

Thickness 

  8.3 mm 
 7.9 mm 
  0.83 cm 
  0.79 cm 
  0.03 ft 
 0.03 ft 
  0.33 in 
  0.31 in 

Weight 

Weight 

  180 g
172 g 
   0.4 lbs
0.38 Ibs 
  6.35 oz
6.07 oz 

Volume 

Volume

 102.71 cm3
92.77 cm3
 6.24 in3
5.63 in3

Body Materials

Body Materials

Plastic
 Aluminium alloy

  Glass

Oppo A8 SIM Card

A91 SIM Card 

SIM Card Type  

SIM Card Type  

Nano-SIM (4FF-fourth form factor, since 2012, 12.30 x 8.80 x 0.67 mm) 
Nano-SIM (4FF-fourth form factor, since 2012, 12.30 x 8.80 x 0.67 mm) 
 Nano-SIM / microSD
Nano-SIM / microSD

Number of SIM Cards 

Number of SIM Cards 

  2
  2

Features

Features 

 Dual SIM stand-by
Dual SIM stand-by 

Oppo A8 Mobile Network Technology and Bandwidth   

A91 Mobile Network Technology and Bandwidth   

 UMTS (384 kbit/s) 
 UMTS (384 kbit/s) 
 EDGE 
 EDGE 
 GPRS  
 GPRS  
 HSPA+ 
 HSPA+ 
LTE
LTE
  TD-SCDMA
TD-SCDMA

Oppo A8 Networks

A91 Networks    

GSM

GSM

GSM 850 MHz (B5)
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 1900 MHz (B2)
 CDMA
 CDMA
 CDMA 800 MHz (BC0)
 CDMA 800 MHz (BC0)

W-CDMA

W-CDMA

W-CDMA 850 MHz (B5)
W-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 900 MHz (B8)
 W-CDMA 2100 MHz (B1)
 W-CDMA 2100 MHz (B1)

 TD-SCDMA

 TD-SCDMA

 TD-SCDMA 1880-1920 MHz
 TD-SCDMA 1880-1920 MHz
  TD-SCDMA 2010-2025 MHz
  TD-SCDMA 1880-1920 MHz

LTE

LTE 

 LTE-FDD 850 MHz (B5)
LTE-FDD 850 MHz (B5)
 LTE-FDD 900 MHz (B8)
LTE-FDD 900 MHz (B8)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2100 MHz (B1)
 LTE-TDD 1900 MHz (B39)
LTE-TDD 1900 MHz (B39) 
LTE-TDD 2300 MHz (B40)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2500 MHz (B41)

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