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- K51S vs Galaxy A51
LG K51S vs Samsung Galaxy A51
What K51S does better (0) and where Galaxy A51 wins (16) — every spec side by side.
vs
3.8Display5.0
5.7Camera8.1
5.6Features5.0
Dimensions
Size comparison
K51SGalaxy A51
| K51S | Galaxy A51 | Difference | |
|---|---|---|---|
| Height | 165.2 mm | 158.5 mm | +6.7 mm |
| Width | 76.7 mm | 73.6 mm | +3.1 mm |
| Thickness | 8.3 mm | 7.9 mm | +0.4 mm |
| Weight | 194 g | 172 g | +22 g |
Drawn to the same scale from the official dimensions (front and side).
Why is K51S better than Galaxy A51?
K51S has no measurable advantages in this pair.
Why is Galaxy A51 better than K51S?
- Main camera32 MP vs 48 MP+50%
- OLED panelNo · K51S: Yes
- Storage (max)64 GB vs 128 GB2×
- Optical stabilisationNo · K51S: Yes
- RAM3 GB vs 4 GB+33%
- Pixel density282 ppi vs 407 ppi+44%
- Selfie camera13 MP vs 32 MP2.5×
- Storage (base)64 GB vs 128 GB2×
- Rear cameras2 vs 42×
- Max video1080p vs 4K
- Weight194 g vs 172 g+13%
- Resolution (width)720 px vs 1,080 px+50%
Specifications
Side by side
| Design | ||
| Weight | 194 g | 172 g |
| Thickness | 8.3 mm | 7.9 mm |
| Height | 165.2 mm | 158.5 mm |
| Width | 76.7 mm | 73.6 mm |
| Frame | — | Plastic |
| Back | — | Plastic |
| Glass protection | Scratch-resistant glass | Gorilla Glass 3 |
| Colours | Titanium, Pink, Blue, Red | White, Black |
| Display | ||
| Screen size | 6.6″ | 6.5″ |
| Panel | IPS LCD | AMOLED |
| OLED panel | No | Yes |
| Resolution (width) | 720 px | 1,080 px |
| Resolution (height) | 1,600 px | 2,400 px |
| Pixel density | 282 ppi | 407 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Peak brightness | — | 400 nits |
| Measured brightness | — | 635 nits |
| Screen-to-body ratio | 73.8% | 87.4% |
| Performance | ||
| Chipset | Mediatek MT6765 Helio P35 | Samsung Exynos 9611 |
| Chip maker | MediaTek | Samsung |
| Process | 12 nm | 10 nm |
| CPU cores | 8 | 8 |
| CPU frequency | 2.3 GHz | 2.3 GHz |
| GPU | PowerVR GE8320 | Mali G72 MP3 |
| AnTuTu score | — | 352,699 |
| Geekbench 6 (multi-core) | — | 1,204 |
| Memory | ||
| RAM | 3 GB | 4 GB |
| Storage (max) | 64 GB | 128 GB |
| Storage (base) | 64 GB | 128 GB |
| Storage type | eMMC 5.1 | UFS 2.0 |
| Memory card slot | Yes | Yes |
| Camera | ||
| Main camera | 32 MP | 48 MP |
| Main camera aperture | — | f/2 |
| Main sensor size | — | 1/2" |
| Rear cameras | 2 | 4 |
| Optical stabilisation | No | Yes |
| Ultra-wide camera | Yes | Yes |
| Telephoto camera | No | No |
| Max video | 1080p | 4K |
| 4K video frame rate | — | 30 fps |
| Selfie camera | 13 MP | 32 MP |
| 4K selfie video | No | No |
| Battery | ||
| Battery capacity | 4,000 mAh | 4,000 mAh |
| Battery type | Li-Po | Li-Po |
| Wired charging | — | 15 W |
| Charged in 30 min | — | 34% |
| Wireless charging | — | No |
| Connectivity | ||
| 5G | — | No |
| eSIM | No | No |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 4 | Wi-Fi 5 |
| Bluetooth | 5 | 5 |
| NFC | Yes | Yes |
| USB | USB Type-C 2.0 | USB Type-C |
| USB version | 2 | 2 |
| Satellite navigation | — | GPS, GLONASS, GALILEO, BDS |
| Features | ||
| Stereo speakers | No | No |
| 3.5 mm headphone jack | Yes | Yes |
| Fingerprint sensor | Rear | Under display |
| Sensors | Fingerprint (rear-mounted), accelerometer, proximity, compass | proximity, accelerometer, gyro, light, fingerprint |
| SAR (head) | — | 0.6 W/kg |
| Software | ||
| OS at launch | Android 9.0 (Pie) | Android 10 |
| Platform | Android | Android |
| Interface | — | One UI 2 |
