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- C51 vs Y18i
Oukitel C51 vs Vivo Y18i
What C51 does better (5) and where Y18i wins (8) — every spec side by side.
Dimensions
Size comparison
C51Y18i
| C51 | Y18i | Difference | |
|---|---|---|---|
| Height | 168.1 mm | 163.6 mm | +4.5 mm |
| Width | 78.2 mm | 75.6 mm | +2.6 mm |
| Thickness | 9.4 mm | 8.4 mm | +1 mm |
| Weight | 205 g | 185 g | +20 g |
Drawn to the same scale from the official dimensions (front and side).
Why is C51 better than Y18i?
- RAM6 GB vs 4 GB+50%
- Storage (max)128 GB vs 64 GB2×
- Battery capacity5,150 mAh vs 5,000 mAh+3%
- Storage (base)128 GB vs 64 GB2×
- Screen size6.8″ vs 6.6″+4%
Why is Y18i better than C51?
- Refresh rate60 Hz vs 90 Hz+50%
- Wired charging10 W vs 15 W+50%
- Dual SIMNo · C51: Yes
- Peak brightness450 nits vs 528 nits+17%
- CPU frequency1.6 GHz vs 1.8 GHz+12%
- Weight205 g vs 185 g+11%
- Pixel density258 ppi vs 269 ppi+4%
- Thickness9.4 mm vs 8.4 mm+12%
Specifications
Side by side
| Design | ||
| Weight | 205 g | 185 g |
| Thickness | 9.4 mm | 8.4 mm |
| Height | 168.1 mm | 163.6 mm |
| Width | 78.2 mm | 75.6 mm |
| Frame | — | Plastic |
| Back | — | Plastic |
| Ingress protection | — | IP54 |
| Water resistance (IPx) | — | IPx4 |
| Glass protection | Corning Gorilla Glass 5 | — |
| Colours | Gray, Blue, Purple | Space Black, Gem Green |
| Display | ||
| Screen size | 6.8″ | 6.6″ |
| Panel | IPS LCD | IPS LCD |
| OLED panel | No | No |
| Resolution (width) | 720 px | 720 px |
| Resolution (height) | 1,600 px | 1,612 px |
| Pixel density | 258 ppi | 269 ppi |
| Refresh rate | 60 Hz | 90 Hz |
| Peak brightness | 450 nits | 528 nits |
| Screen-to-body ratio | 84.9% | 83.6% |
| Performance | ||
| Chipset | Unisoc T606 | Unisoc T612 |
| Chip maker | Unisoc | Unisoc |
| Process | 12 nm | 12 nm |
| CPU cores | 8 | 8 |
| CPU frequency | 1.6 GHz | 1.8 GHz |
| GPU | Mali-G57 MP1 | Mali-G57 MP1 |
| Memory | ||
| RAM | 6 GB | 4 GB |
| Storage (max) | 128 GB | 64 GB |
| Storage (base) | 128 GB | 64 GB |
| Storage type | — | eMMC 5.1 |
| Memory card slot | Yes | Yes |
| Camera | ||
| Main camera | 13 MP | 13 MP |
| Main camera aperture | f/2.2 | f/2.2 |
| Main sensor size | 1/3.06" | — |
| 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 | 5,150 mAh | 5,000 mAh |
| Battery type | Li-Po | Li-Ion |
| Wired charging | 10 W | 15 W |
| Wireless charging | No | No |
| Connectivity | ||
| 5G | No | No |
| eSIM | No | No |
| Dual SIM | No | Yes |
| Wi-Fi standard | Wi-Fi 5 | Wi-Fi 5 |
| Bluetooth | 5 | 5 |
| NFC | No | No |
| USB | USB Type-C 2.0 | USB Type-C 2.0 |
| USB version | 2 | 2 |
| Satellite navigation | GLONASS, GALILEO, BDS | GLONASS, GALILEO, BDS, QZSS |
| Features | ||
| Stereo speakers | No | No |
| 3.5 mm headphone jack | Yes | Yes |
| Fingerprint sensor | Side | — |
| Sensors | Fingerprint (side-mounted), accelerometer, proximity | Accelerometer, proximity |
| SAR (head) | — | 0.69 W/kg |
| Software | ||
| OS at launch | Android 13 | Android 14 |
| Platform | Android | Android |
| Interface | — | Funtouch 14 |
