Redmi K90 vs Vivo Y81i
The Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo Y81i (2018) runs on the MediaTek Helio A22. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 18/100 (a 58-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 3260); the main camera is 50 MP vs 13 MP; the Redmi K90 is faster in AnTuTu (3,077,585 vs 155,362); the Redmi K90 has NFC for contactless payments, the Vivo Y81i doesn't; the Vivo Y81i is noticeably lighter (143g vs 206g).
Profile comparison
Category scores
Redmi K90
Vivo Y81i
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 155362
- Better Geekbench Single: 3013 vs 300
- Better Geekbench Multi: 9287 vs 486
- Bigger battery: 7100 vs 3260 mAh
- Better main camera: 50MP vs 13MP
- Higher performance (91/100 vs 10/100)
- Better camera (58/100 vs 10/100)
- Longer battery life (72/100 vs 15/100)
- Better display (82/100 vs 39/100)
What makes Vivo Y81i better?
- Lighter: 143g vs 206g
- Better portability (85/100 vs 55/100)
Comparison verdict
Comparing the Redmi K90 vs the Vivo Y81i, the Redmi K90 scores 58 points higher (76/100 vs 18/100). In the "performance" category, the Redmi K90 leads (91/100 vs 10/100). In the "camera" category, the Redmi K90 leads (58/100 vs 10/100). In the "battery" category, the Redmi K90 leads (72/100 vs 15/100). In the "performance" category, the Redmi K90 significantly outperforms the Vivo Y81i (91/100 vs 10/100). In the "display" category, the Redmi K90 significantly outperforms the Vivo Y81i (82/100 vs 39/100). In the "camera" category, the Redmi K90 significantly outperforms the Vivo Y81i (58/100 vs 10/100). In the "battery" category, the Redmi K90 significantly outperforms the Vivo Y81i (72/100 vs 15/100). In the "portability" category, the Vivo Y81i significantly outperforms the Redmi K90 (85/100 vs 55/100).
Specs comparison
| Specification | Redmi K90 | Vivo Y81i | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Helio A22 | |
| AnTuTu | 3077585 | 155362 | |
| Geekbench Single | 3013 | 300 | |
| Geekbench Multi | 9287 | 486 | |
| Display | 6.6" AMOLED | 6.2" IPS LCD | |
| Resolution | 2510x1156 | 720x1520 | |
| Refresh rate | 120 Hz | — | |
| Battery | 7100 mAh | 3260 mAh | |
| Charging | 100W | — | |
| Main camera | 50 MP | 13 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Telephoto | 50 MP | 0 MP | |
| Front camera | 20 MP | 5 MP | |
| RAM | 12GB / 16GB | 2GB | |
| Storage | 256GB / 512GB | 16GB | |
| OS | Android 16 | Android 8.1 (Oreo); Funtouch 4 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | no | |
| Protection | IP68 | — | |
| Dimensions | 157.5×75.3×8.0 mm | 155.1×75.0×7.8 mm | |
| Weight | 206 g | 143 g | |
| Launch price | $401 | — |
Camera comparison
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Vivo Y81i
- Main: 13MP f/2.2
- Front: 5MP
Display comparison
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Vivo Y81i
- 6.2" IPS LCD
- Resolution: 720x1520
- Refresh rate: —
Battery and charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Vivo Y81i
- 3260 mAh
- Wireless charging: no data
Overall performance score
We compared Redmi K90 and Vivo Y81i, covering their specs and all relevant benchmarks.
Redmi K90 leads Vivo Y81i by 1880.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Vivo Y81i
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 significantly outperforms the Vivo Y81i (91/100 vs 10/100).
display
In the "display" category, the Redmi K90 significantly outperforms the Vivo Y81i (82/100 vs 39/100).
camera
In the "camera" category, the Redmi K90 significantly outperforms the Vivo Y81i (58/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 significantly outperforms the Vivo Y81i (72/100 vs 15/100).
portability
In the "portability" category, the Vivo Y81i significantly outperforms the Redmi K90 (85/100 vs 55/100).
Frequently asked questions
Which is better: the Redmi K90 or the Vivo Y81i?
The Redmi K90 significantly outperforms the Vivo Y81i by 58 points (76/100 vs 18/100).
What is the rating of the Redmi K90 and the Vivo Y81i?
The Redmi K90 has a MobileRank rating of 76/100, the Vivo Y81i — 18/100.
Which has the better camera: the Redmi K90 or the Vivo Y81i?
The Redmi K90 leads on camera score (58/100 vs 10/100).
Which is more powerful: the Redmi K90 or the Vivo Y81i?
The Redmi K90 leads on performance (91/100 vs 10/100).
Should you choose the Redmi K90 over the Vivo Y81i?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.