Oppo Realme C21Y vs Realme 8i

Here we compared two smartphones: the 6.5-inch Oppo Realme C21Y (with Unisoc T610) that was released on June 21, 2021, against the Oppo Realme 8i, which is powered by MediaTek Helio G96 and came out 3 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 Oppo Realme C21Y
  • Reverse charging feature
Reasons to consider the Oppo Realme 8i
  • Higher display refresh rate – 120 Hz
  • 60% better performance in AnTuTu Benchmark (312K versus 194K)
  • 49% higher pixel density (401 vs 270 PPI)
  • Modern USB Type-C port
  • Compatible with Wi-Fi 5 wireless networks
  • Supports 18W fast charging
  • Newer Bluetooth version (v5.1)
  • More recent OS version: Android 12 versus 11
  • Slow-motion recording at 120FPS

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

Display

Type IPS LCD IPS LCD
Size 6.5 inches 6.6 inches
Resolution 720 x 1600 pixels 1080 x 2412 pixels
Aspect ratio 20:9 20:9
PPI 270 ppi 401 ppi
Refresh rate 60 Hz 120 Hz
Max rated brightness 400 nits 600 nits
HDR support No No
Screen protection Tempered glass Tempered glass
Screen-to-body ratio 81.6% 84.6%
Display features - - DCI-P3
Peak brightness test (auto)
543 nits

Design and build

Height 164.5 mm (6.48 inches) 164.1 mm (6.46 inches)
Width 76 mm (2.99 inches) 75.5 mm (2.97 inches)
Thickness 9.1 mm (0.36 inches) 8.5 mm (0.33 inches)
Weight 200 gramm (7.05 oz) 194 gramm (6.84 oz)
Waterproof No No
Rear material Plastic Plastic
Frame material Plastic Plastic
Colors Black, Blue Black, Purple
Fingerprint scanner Yes, rear Yes, in home button
Screen-to-body ratio
81.6%
Realme 8i +4%
84.6%

Performance

Tests of Oppo Realme C21Y and Oppo Realme 8i in the benchmarks
SoC
Chipset Unisoc T610 MediaTek Helio G96
Max. clock 1800 MHz 2050 MHz
CPU cores 8 (2 + 6) 8 (2 + 6)
Architecture - 6 cores at 1.82 GHz: Cortex-A55
- 2 cores at 1.82 GHz: Cortex-A75
- 6 cores at 2 GHz: Cortex-A55
- 2 cores at 2.05 GHz: Cortex-A76
L3 cache 1 MB -
Lithography process 12 nanometers 12 nanometers
Graphics ARM Mali G52 MP2 Mali G57 MC2
GPU clock 614 MHz 950 MHz
FLOPS ~71.2 GFLOPS -
Memory
RAM size 3, 4 GB 4, 6 GB
Memory type LPDDR4X LPDDR4X
Memory clock 1866 MHz 2133 MHz
Channels 2 2
Storage
Storage size 32, 64 GB 64, 128 GB
Storage type eMMC 5.1 UFS 2.1
Memory card MicroSD MicroSD
Memory card max. size Up to 256 GB Up to 512 GB

Benchmarks

Geekbench 5 (Single-Core)
Realme 8i +55%
543
Geekbench 5 (Multi-Core)
Realme 8i +44%
1898
AnTuTu Benchmark 9
194986
Realme 8i +60%
312166
CPU 66485 98091
GPU 32103 57277
Memory 37779 64313
UX 57506 89548
Total score 194986 312166
3DMark Wild Life Performance
Stability - 98%
Graphics test - 6 FPS
Graphics score - 1086
PCMark 3.0 score - 8498
Sources: 3DMark [3]

Software

Operating system Android 11 Android 11 (Can be upgraded to Android 12)
ROM Realme UI 2.0 Realme UI 3.0

Battery

Specifications
Capacity 5000 mAh 5000 mAh
Charge power 10 W 18 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No No
Reverse charging Yes No
Fast charging No Yes (30% in 30 min)
Full charging time 3:00 hr 2:21 hr
Battery life tests
Web browsing - 13:02 hr
Watching video - 10:59 hr
Gaming - 06:12 hr
Standby - 142 hr
General battery life
36:01 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 13 megapixels 50 megapixels
Image resolution 4128 x 3096 8700 x 5800
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K video recording No No
4K video recording No No
1080p video recording Up to 30FPS Up to 30FPS
Slow motion No 120 FPS (720p)
Lenses 3 (13 MP + 2 MP + 2 MP) 3 (50 MP + 2 MP + 2 MP)
Wide (main) lens - 13 MP
- Aperture: f/2.2
- Focal length: 26 mm
- Sensor: 1/3.06" (CMOS)
- Phase autofocus
- 50 MP
- Aperture: f/1.8
- Pixel size: 0.64 micron
- Sensor: 1/2.76", Samsung S5KJN1 (ISOCELL CMOS)
- Phase autofocus
Macro lens - 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- Sensor: 1/5", GalaxyCore GC02M1 (CMOS)
Depth lens - 2 MP
- Aperture: f/2.4
- 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- Sensor: 1/5", Omnivision OV02B10 (CMOS)
Camera features - Bokeh mode - Bokeh mode
- Pro mode
Selfie camera
Megapixels 5 megapixels 16 megapixels
Image resolution 2560 x 1960 4920 x 3264
Aperture f/2.2 f/2.1
Focal length 27 mm -
Pixel size 1.12 microns 1 microns
Sensor type CMOS CMOS
Sensor size 1/5" 1/3.0"
Video resolution 1080p (Full HD) at 30 FPS 1080p (Full HD) at 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 4 (802.11 a/b/g/n) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - 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 LE, HID, A2DP LE, A2DP
USB type Micro USB USB Type-C
USB version 2 2
USB features - Charging
- USB-Storage mode
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou GPS, GLONASS, Beidou, Galileo, NAVIC
NFC* No Depends on the region
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* 7 13
5G support No No

Sound

Speakers Mono Mono
Headphone audio jack Yes Yes
FM radio No No
Dolby Atmos No No

Other

Category Budget Mid-range
Announced June 2021 September 2021
Release date July 2021 September 2021
Sensors - Proximity sensor
- 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

After analyzing all the data, we think that the Oppo Realme 8i is definitely a better buy.

Cast your vote

So, which phone would you choose?
4 (12.1%)
29 (87.9%)
Total votes: 33

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