OnePlus Ace 5 Ultra vs Redmi K40
The OnePlus Ace 5 Ultra (2025) runs on the MediaTek Dimensity 9400+, while the Redmi K40 (2021) runs on the Qualcomm Snapdragon 870; estimated prices are $350 and $309. By overall MobileRank rating, the OnePlus Ace 5 Ultra leads — 60/100 vs 34/100 (a 26-point difference). Key differences: the OnePlus Ace 5 Ultra has the bigger battery (6700 mAh vs 4520); the main camera is 50 MP vs 48 MP; the OnePlus Ace 5 Ultra is faster in AnTuTu (2,948,304 vs 1,010,069).
OnePlus Ace 5 Ultra
Redmi K40
- Higher AnTuTu: 2948304 vs 1010069
- Better Geekbench Single: 2729 vs 1298
- Better Geekbench Multi: 8430 vs 3520
- Bigger battery: 6700 vs 4520 mAh
- Faster charging: 100W vs 33W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (62/100 vs 8/100)
- Longer battery life (68/100 vs 28/100)
- Lighter: 196g vs 206g
- Cheaper: $309 vs $350
- Better design/ergonomics (55/100 vs 42/100)
- Better value for money (89/100 vs 86/100)
Comparing the OnePlus Ace 5 Ultra vs the Redmi K40, the OnePlus Ace 5 Ultra scores 26 points higher (60/100 vs 34/100). In the "performance" category, the OnePlus Ace 5 Ultra leads (62/100 vs 8/100). In the "battery" category, the OnePlus Ace 5 Ultra leads (68/100 vs 28/100). In the "performance" category, the OnePlus Ace 5 Ultra significantly outperforms the Redmi K40 (62/100 vs 8/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, both devices are on the same level — 31/100. In the "battery" category, the OnePlus Ace 5 Ultra significantly outperforms the Redmi K40 (68/100 vs 28/100). In the "design" category, the Redmi K40 is a bit better (55/100 vs 42/100). In the "value for money" category, the Redmi K40 and the OnePlus Ace 5 Ultra are nearly equal (89/100 vs 86/100).
| Specification | OnePlus Ace 5 Ultra | Redmi K40 | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9400+ | Qualcomm Snapdragon 870 | |
| AnTuTu | 2948304 | 1010069 | |
| Geekbench Single | 2729 | 1298 | |
| Geekbench Multi | 8430 | 3520 | |
| Display | 6.8" AMOLED | 6.7" AMOLED | |
| Resolution | 1272x2800 | 2400x1080 | |
| Refresh rate | 144 Hz | 120 Hz | |
| Battery | 6700 mAh | 4520 mAh | |
| Charging | 100W | 33W | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 12GB / 16GB | 6GB / 8GB / 12GB | |
| Storage | 256GB / 512GB / 1TB | 128GB / 256GB | |
| OS | Android 15, ColorOS 15 | Android 11 | |
| Brightness (peak) | 1400 nits | — | |
| NFC | yes | — | |
| Protection | IP65 | — | |
| Dimensions | 163.4×77.0×8.1 mm | — | |
| Weight | 206 g | 196 g | |
| Price | $350 | $309 |
OnePlus Ace 5 Ultra
- Main: 50MP f/f/1.8
- Ultrawide: 8MP
- Front: 16MP
Redmi K40
- Main: 48MP f/1.79
- Ultrawide: 8MP
- Front: 20MP
OnePlus Ace 5 Ultra
- 6.8" AMOLED
- Resolution: 1272x2800
- Refresh rate: 144 Hz
Redmi K40
- 6.7" AMOLED
- Resolution: 2400x1080
- Refresh rate: 120 Hz
OnePlus Ace 5 Ultra
- 6700 mAh
- Wired: 100W
- No wireless charging
Redmi K40
- 4520 mAh
- Wired: 33W
- No wireless charging
We compared OnePlus Ace 5 Ultra and Redmi K40, covering their specs and all relevant benchmarks.
OnePlus Ace 5 Ultra leads Redmi K40 by 191.9% in our overall performance rating.
Price difference: $41. Redmi K40 is cheaper by $41.
performance
In the "performance" category, the OnePlus Ace 5 Ultra significantly outperforms the Redmi K40 (62/100 vs 8/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, both devices are on the same level — 31/100.
battery
In the "battery" category, the OnePlus Ace 5 Ultra significantly outperforms the Redmi K40 (68/100 vs 28/100).
design
In the "design" category, the Redmi K40 is a bit better (55/100 vs 42/100).
value for money
In the "value for money" category, the Redmi K40 and the OnePlus Ace 5 Ultra are nearly equal (89/100 vs 86/100).
Which is better: the OnePlus Ace 5 Ultra or the Redmi K40?
The OnePlus Ace 5 Ultra significantly outperforms the Redmi K40 by 26 points (60/100 vs 34/100).
What is the rating of the OnePlus Ace 5 Ultra and the Redmi K40?
The OnePlus Ace 5 Ultra has a MobileRank rating of 60/100, the Redmi K40 — 34/100.
Which is more powerful: the OnePlus Ace 5 Ultra or the Redmi K40?
The OnePlus Ace 5 Ultra leads on performance (62/100 vs 8/100).
Should you choose the OnePlus Ace 5 Ultra over the Redmi K40?
The OnePlus Ace 5 Ultra is a better fit for active users, budget-conscious buyers. The Redmi K40 is a better fit for budget-conscious buyers.