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)