OPPO A91 vs OPPO A55 Specs Comparison

Availability

Officially announced
Dec 20, 2019	Oct 01, 2021

Design

Dimensions
6.31 x 2.89 x 0.31 inches 160.2 x 73.3 x 7.9 mm	6.44 x 2.98 x 0.33 inches 163.6 x 75.7 x 8.4 mm (~9 mm with camera bump)
Weight
6.07 oz / 172.0 g
Materials
Back: Plastic Frame: Plastic
Resistance
	Splash
Biometrics
Optical in-screen fingerprint	Fingerprint (touch)
Keys
Left: Volume control; Right: Lock/Unlock key	Left: Volume control; Right: Lock/Unlock key
Colors
Lightening Black, Unicorn White, Blazing Blue	Rainbow Blue, Starry Black, Green

Display

Size
6.4-inch, 84.05% screen-to-body	6.5-inch, 82.64% screen-to-body
Type
AMOLED, 60Hz	IPS LCD, 550 nits
Resolution
2400x1080px, 20:9 ratio, 411 PPI	1600x720px, 20:9 ratio, 270 PPI
Protection
Corning Gorilla Glass 5	NEG Dinorex

Hardware

System chip
Mediatek Helio P70 MT6771V (12 nm)	Mediatek Helio G35 MT6765G (12 nm)
Processor
Octa-core 2100 MHz Cortex-A73	Octa-core 2300 MHz
GPU
Mali-G72 MP3	PowerVR GE8320
Memory
4GB (LPDDR4)/128GB (UFS 2.1) 8GB/128GB	4GB/64GB 4GB/128GB 6GB/128GB
Storage expansion
microSDXC	microSDXC
OS
Android (9.0 Pie)	Android (11)

Battery

Type
4025 mAh, Li - Polymer	5000 mAh
Charging
SuperVOOC 3.0	Fast charging
Charge speed
Wired: 20.0W	Wired: 18.0W

Camera

Rear
Dual camera	Triple camera
Main camera
48 MP (PDAF) Aperture size: F1.8 Focal length: 26mm (wide) mm Sensor size: 1/2.3" Pixel size: 0.8 μm	50 MP (PDAF) Aperture size: F1.8 Focal length: 26 mm
Second camera
8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/1.4" Pixel size: 1.12 μm	2 MP (Macro)
Third camera
2 MP (Macro) Aperture size: F2.4 Sensor size: 1/1.5" Pixel size: 1.75 μm	2 MP (Depth information)
Fourth camera
2 MP (Depth information) Aperture size: F2.4 Sensor size: 1/3.1" Pixel size: 1 μm
Flash
LED	LED
Video recording
1080p (30 fps) HDR, Time-lapse video, EIS	Yes
Front
16 MP Video capture: 720p (30 fps)	16 MP

Connectivity & Features

Bluetooth
4.2	5.0
WLAN
b,g,n,ac Wi-Fi Direct, Hotspot 802.11 b, g, n, ac	a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac
USB
Type-C, USB 2.0	Type-C, USB 2.0
Sensors
Accelerometer, Gyroscope, Ambient light sensor, Proximity sensor	Accelerometer, Compass, Ambient light sensor, Proximity sensor
Location
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, QZSS, Cell ID, Wi-Fi positioning
Other
	NFC

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM
Additional microphone(s)
Noise cancellation	Noise cancellation

Cellular

4G (FDD) Bands
1, 3, 5, 7, 8	1, 3, 5, 8
4G (TDD) Bands
38, 40, 41	38, 40, 41
3G Bands
1, 5, 8	1, 5, 8
Data Speed
LTE, HSDPA+ (4G) 42.2 Mbit/s	LTE-A, HSDPA+ (4G) 42.2 Mbit/s
Dual SIM
No
SIM type
Nano SIM	Dual Nano SIM

Alternative variants

Comes with 8GB RAM

Memory	8GB

With 128GB internal storage

Memory	128GB

With ^GB RAM and 128GB internal storage

Memory	6GB/128GB

Links

Full specifications
OPPO A91 Specs	OPPO A55 Specs