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- A18 vs C51
OPPO A18 vs Realme C51
What A18 does better (4) and where C51 wins (7) — every spec side by side.
Dimensions
Size comparison
A18C51
| A18 | C51 | Difference | |
|---|---|---|---|
| Height | 163.7 mm | 167.2 mm | −3.5 mm |
| Width | 75 mm | 76.7 mm | −1.7 mm |
| Thickness | 8.2 mm | 8 mm | +0.2 mm |
| Weight | 188 g | 186 g | +2 g |
Drawn to the same scale from the official dimensions (front and side).
Why is A18 better than C51?
- Peak brightness720 nits vs 560 nits+29%
- CPU frequency2 GHz vs 1.8 GHz+11%
- Pixel density269 ppi vs 260 ppi+3%
- Bluetooth5.3 vs 5+6%
Why is C51 better than A18?
- Main camera8 MP vs 50 MP6.2×
- RAM4 GB vs 6 GB+50%
- Storage (max)128 GB vs 256 GB2×
- NFCNo · A18: Yes
- Screen size6.6″ vs 6.7″+3%
- Main camera aperturef/2 vs f/1.8+11%
- Thickness8.2 mm vs 8 mm+2%
Specifications
Side by side
| Design | ||
| Weight | 188 g | 186 g |
| Thickness | 8.2 mm | 8 mm |
| Height | 163.7 mm | 167.2 mm |
| Width | 75 mm | 76.7 mm |
| Frame | — | Plastic |
| Back | — | Plastic |
| Ingress protection | IP54 | — |
| Water resistance (IPx) | IPx4 | — |
| Colours | Glowing Black, Glowing Blue | Mint Green, Carbon Black |
| Display | ||
| Screen size | 6.6″ | 6.7″ |
| Panel | IPS LCD | IPS LCD |
| OLED panel | No | No |
| Resolution (width) | 720 px | 720 px |
| Resolution (height) | 1,612 px | 1,600 px |
| Pixel density | 269 ppi | 260 ppi |
| Refresh rate | 90 Hz | 90 Hz |
| Peak brightness | 720 nits | 560 nits |
| Screen-to-body ratio | 84.2% | 85.5% |
| Performance | ||
| Chipset | Mediatek MT6769 Helio G85 | Unisoc Tiger T612 |
| Chip maker | MediaTek | Unisoc |
| Process | 12 nm | 12 nm |
| CPU cores | 8 | 8 |
| CPU frequency | 2 GHz | 1.8 GHz |
| GPU | Mali-G52 MC2 | Mali-G57 |
| AnTuTu score | — | 342,790 |
| Geekbench 6 (multi-core) | — | 1,476 |
| Memory | ||
| RAM | 4 GB | 6 GB |
| Storage (max) | 128 GB | 256 GB |
| Storage (base) | 64 GB | 64 GB |
| Storage type | eMMC 5.1 | eMMC 5.1 |
| Memory card slot | Yes | Yes |
| Camera | ||
| Main camera | 8 MP | 50 MP |
| Main camera aperture | f/2 | f/1.8 |
| Main sensor size | — | 1/2.76" |
| Rear cameras | 1 | 1 |
| Optical stabilisation | No | No |
| Ultra-wide camera | No | No |
| Telephoto camera | No | No |
| Max video | 1080p | 1080p |
| Selfie camera | 5 MP | 5 MP |
| 4K selfie video | No | No |
| Battery | ||
| Battery capacity | 5,000 mAh | 5,000 mAh |
| Battery type | Li-Po | Li-Po |
| Wired charging | — | 33 W |
| Charged in 30 min | — | 54% |
| Wireless charging | No | No |
| Connectivity | ||
| 5G | No | No |
| eSIM | No | No |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 5 | Wi-Fi 5 |
| Bluetooth | 5.3 | 5 |
| NFC | No | Yes |
| USB | USB Type-C 2.0 | USB Type-C 2.0 |
| USB version | 2 | 2 |
| Satellite navigation | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO |
| Features | ||
| Stereo speakers | No | No |
| 3.5 mm headphone jack | Yes | Yes |
| Fingerprint sensor | Side | Side |
| Sensors | Fingerprint (side-mounted), accelerometer, proximity, compass | Fingerprint (side-mounted), accelerometer, proximity, compass |
| SAR (head) | — | 1.18 W/kg |
| Software | ||
| OS at launch | Android 13 | Android 13 |
| Platform | Android | Android |
| Interface | ColorOS 15 | Realme UI T |
