vivo S1 vs Y51a

Specs compared side by side, measured on real phones shared by owners with the Device Info app.

vivo S1vivo S1Helio P65Change
vivo Y51avivo Y51aSnapdragon 662Change

Key differences

  1. Chipset: the S1 uses the Helio P65 (12 nm), the Y51a the Snapdragon 662 (11 nm). The S1's fastest core runs at 2.00 GHz, the Y51a's at 2.02 GHz.
  2. Screen: 6.4 inches on the S1, 6.6 inches on the Y51a. Up to 62 Hz on the S1, 60 Hz on the Y51a.
  3. Battery: 4,500 mAh on the S1, 5,000 mAh on the Y51a.
  4. Main camera: 15.9 MP on the S1, 12 MP on the Y51a.

Chipset

Chipset
Helio P65Snapdragon 662
Process
12 nm11 nm
CPU
2× 2.00 GHz Cortex-A75
6× 1.70 GHz Cortex-A554× 2.02 GHz Kryo 260 Gold
4× 1.80 GHz Kryo 260 Silver
Top CPU speed
2.00 GHz2.02 GHz
CPU cores
88
GPU
Mali-G52 MC2Adreno 610

Memory

Versions seen
6GB | 128GB8GB | 128GB
RAM type
LPDDR4XLPDDR4X

Display

Size
6.4 in6.6 in
Resolution
1080 × 23401080 × 2408
Pixel density
404 ppi403 ppi
Refresh rates
62 Hz60 Hz
HDR
—HDR10, HLG

Battery

Capacity
4,500 mAh5,000 mAh

Cameras

Back camera
15.9 MP4608 × 3456 · f/1.78 · 4.05 mm12 MP4000 × 3000 · f/1.79 · 2.36 mm
Front camera
15.9 MP4608 × 3456 · f/2 · 3.84 mm8 MP3264 × 2448 · f/1.8 · 2.64 mm

Megapixels are what Android reports to apps. Many phones combine pixels by default, so the advertised megapixels can be higher.

Connectivity

Wi-Fi
—Wi-Fi 5
6 GHz Wi-Fi
—No
Bluetooth LE Audio
—No
NFC
NoNo
UWB
NoNo
USB host
YesYes

Software

Android
Android 9Android 13
Released with
Android 9Android 11
Widevine DRM
L3L1

Sensors

Sensors
27 sensors31 sensors
S1 full specs Y51a full specs

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From phones shared with the Device Info app · updated November 2026 Hardware specs only. No personal data. Privacy