Redmi K90 vs Samsung Galaxy A40
The Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Samsung Galaxy A40 (2019) runs on the Samsung Exynos 7904; launch prices were $401 and $250. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 25/100 (a 51-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 3100); the main camera is 50 MP vs 16 MP; the Redmi K90 is faster in AnTuTu (3,077,585 vs 257,901); the Samsung Galaxy A40 is noticeably lighter (140g vs 206g).
Profile comparison
Category scores
Redmi K90
Samsung Galaxy A40
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 257901
- Better Geekbench Single: 3013 vs 330
- Better Geekbench Multi: 9287 vs 975
- Bigger battery: 7100 vs 3100 mAh
- Better main camera: 50MP vs 16MP
- Higher refresh rate: 120Hz vs 60Hz
- Higher performance (91/100 vs 19/100)
- Better camera (58/100 vs 17/100)
- Longer battery life (72/100 vs 12/100)
- Better display (82/100 vs 51/100)
What makes Samsung Galaxy A40 better?
- Lighter: 140g vs 206g
- Cheaper at launch: $250 vs $401
- Better portability (84/100 vs 55/100)
Comparison verdict
Comparing the Redmi K90 vs the Samsung Galaxy A40, the Redmi K90 scores 51 points higher (76/100 vs 25/100). In the "performance" category, the Redmi K90 leads (91/100 vs 19/100). In the "camera" category, the Redmi K90 leads (58/100 vs 17/100). In the "battery" category, the Redmi K90 leads (72/100 vs 12/100). Value score: Redmi K90 — 80/100, Samsung Galaxy A40 — 0/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Redmi K90 significantly outperforms the Samsung Galaxy A40 (91/100 vs 19/100). In the "display" category, the Redmi K90 significantly outperforms the Samsung Galaxy A40 (82/100 vs 51/100). In the "camera" category, the Redmi K90 significantly outperforms the Samsung Galaxy A40 (58/100 vs 17/100). In the "battery" category, the Redmi K90 significantly outperforms the Samsung Galaxy A40 (72/100 vs 12/100). In the "portability" category, the Samsung Galaxy A40 notably outperforms the Redmi K90 (84/100 vs 55/100).
Specs comparison
| Specification | Redmi K90 | Samsung Galaxy A40 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Samsung Exynos 7904 | |
| AnTuTu | 3077585 | 257901 | |
| Geekbench Single | 3013 | 330 | |
| Geekbench Multi | 9287 | 975 | |
| Display | 6.6" AMOLED | 5.9" AMOLED | |
| Resolution | 2510x1156 | — | |
| Refresh rate | 120 Hz | 60 Hz | |
| Battery | 7100 mAh | 3100 mAh | |
| Charging | 100W | — | |
| Main camera | 50 MP | 16 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Telephoto | 50 MP | 0 MP | |
| Front camera | 20 MP | 25 MP | |
| RAM | 12GB / 16GB | 4GB | |
| Storage | 256GB / 512GB | 64GB | |
| OS | Android 16 | — | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 157.5×75.3×8.0 mm | 144.4×69.2×7.9 mm | |
| Weight | 206 g | 140 g | |
| Launch price | $401 | $250 |
Camera comparison
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Samsung Galaxy A40
- Main: 16MP
- Front: 25MP
Display comparison
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Samsung Galaxy A40
- 5.9" AMOLED
- Refresh rate: 60 Hz
Battery and charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy A40
- 3100 mAh
- No wireless charging
Overall performance score
We compared Redmi K90 and Samsung Galaxy A40, covering their specs and all relevant benchmarks.
Redmi K90 leads Samsung Galaxy A40 by 1093.3% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $151. Samsung Galaxy A40 was $151 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 significantly outperforms the Samsung Galaxy A40 (91/100 vs 19/100).
display
In the "display" category, the Redmi K90 significantly outperforms the Samsung Galaxy A40 (82/100 vs 51/100).
camera
In the "camera" category, the Redmi K90 significantly outperforms the Samsung Galaxy A40 (58/100 vs 17/100).
battery
In the "battery" category, the Redmi K90 significantly outperforms the Samsung Galaxy A40 (72/100 vs 12/100).
portability
In the "portability" category, the Samsung Galaxy A40 notably outperforms the Redmi K90 (84/100 vs 55/100).
Frequently asked questions
Which is better: the Redmi K90 or the Samsung Galaxy A40?
The Redmi K90 significantly outperforms the Samsung Galaxy A40 by 51 points (76/100 vs 25/100).
What is the rating of the Redmi K90 and the Samsung Galaxy A40?
The Redmi K90 has a MobileRank rating of 76/100, the Samsung Galaxy A40 — 25/100.
Which has the better camera: the Redmi K90 or the Samsung Galaxy A40?
The Redmi K90 leads on camera score (58/100 vs 17/100).
Which is more powerful: the Redmi K90 or the Samsung Galaxy A40?
The Redmi K90 leads on performance (91/100 vs 19/100).
Should you choose the Redmi K90 over the Samsung Galaxy A40?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.