Google Pixel 4a vs Samsung Galaxy A51
A spec-by-spec comparison of the Google Pixel 4a and the Samsung Galaxy A51, taken from their full specification sheets. Green marks the better value in each measured row.
Head to head
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| Price | $140 | $79 |
| Our rating | 8/10 | 7/10 |
| Battery | 3,140 mAh | 4,000 mAh |
| Wired charging | 18W | 15W |
| RAM (max) | 6 GB | 8 GB |
| Storage (max) | 128 GB | 256 GB |
| Screen size | 5.81 in | 6.5 in |
| Main camera | 12.2 MP | 48 MP |
| Weight (lower is lighter) | 143 g | 172 g |
| Released | Aug 2020 | Dec 2019 |
Summary: Google Pixel 4a is ahead on our rating, wired charging, weight (lower is lighter). Samsung Galaxy A51 is ahead on battery, ram (max), storage (max), screen size.
★ Which should you buy? Samsung Galaxy A51 is the stronger overall pick on the measured specs.
Reviewed by the infozme.com Editorial Team — see how we research & rate phones.
Display
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| Type | OLED, HDR | Super AMOLED, 16M colors |
| Size | 5.81 inches, 84.4 cm2 (~80.4% screen-to-body ratio) | 6.5 inches, 102.0 cm² (~87.4% screen-to-body ratio) |
| Resolution | 1080 x 2340 pixels, 19.5:9 ratio (~443 ppi density) | 1080 x 2400 pixels, 20:9 ratio (~405 ppi density) |
| Protection | Corning Gorilla Glass 3 | Corning Gorilla Glass 3 |
| Features | — | Infinity-O Display |
Platform
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| OS | Android 10, upgradable to Android 13 | Android 10, upgradable to Android 13, One UI 5.1 |
| Chipset | Qualcomm Snapdragon 730G (8 nm) | Exynos 9611 (10 nm) |
| CPU | Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver) | Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53) |
| GPU | Adreno 618 | Mali-G72 MP3 |
Memory
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| Card slot | No | microSDXC (dedicated slot) |
| Internal | 128GB 6GB RAM (UFS 2.1) | 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM |
Main Camera
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| Modules | 12.2 MP, f/1.7, 27mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, OIS | — |
| Features | LED flash, Auto-HDR, panorama, Night Sight, Top Shot, Portrait Mode, Live HDR+, Motion Auto Focus, Frequent Faces | LED flash, panorama, HDR |
| Video | 4K@30fps, 1080p@30/60/120fps, 720p@240fps; gyro-EIS | 4K@30fps, 1080p@30/120fps; gyro-EIS |
| Quad | — | 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF; 12 MP, f/2.2, 123˚ (ultrawide); 5 MP, f/2.4, (macro); 5 MP, f/2.4, (depth) |
Selfie Camera
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| Modules | 8 MP, f/2.0, 24mm (wide), 1.12µm | — |
| Features | Auto-HDR | HDR |
| Video | 1080p@30fps | 4K@30fps, 1080p@30fps |
| Single | — | 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm |
Battery
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| Type | Li-Po 3140 mAh, non-removable | Li-Po 4000 mAh, non-removable |
| Charging | 18W wired, PD2.0 | 15W wired |
Body
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| Dimensions | 144 x 69.4 x 8.2 mm (5.67 x 2.73 x 0.32 in) | 158.5 x 73.6 x 7.9 mm (6.24 x 2.90 x 0.31 in) |
| Weight | 143 g (5.04 oz) | 172 g (6.07 oz) |
| Build | Glass front (Gorilla Glass 3), plastic back, plastic frame | Glass front (Gorilla Glass 3), plastic back, plastic frame |
| SIM | Nano-SIM and/or eSIM | Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by) |
Comms
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Bluetooth | 5.0, A2DP, LE, aptX HD | 5.0, A2DP, LE |
| Positioning | GPS, GLONASS, GALILEO, QZSS | GPS, GLONASS, GALILEO, BDS |
| NFC | Yes | Yes (market/region dependent) |
| Radio | No | — |
| USB | USB Type-C 3.1 | USB Type-C 2.0 |
Launch
| Google Pixel 4a | Samsung Galaxy A51 |
|---|
| Announced | August 3, 2020 | December 12, 2019 |
| Status | Released August 20, 2020 | — |
| Released | — | December 16, 2019 |
Frequently asked questions
Which has the better battery, Google Pixel 4a or Samsung Galaxy A51?
Samsung Galaxy A51 — 3,140 mAh for the Google Pixel 4a versus 4,000 mAh for the Samsung Galaxy A51.
Which has more RAM, Google Pixel 4a or Samsung Galaxy A51?
Samsung Galaxy A51 — 6 GB for the Google Pixel 4a versus 8 GB for the Samsung Galaxy A51.
Which is lighter, Google Pixel 4a or Samsung Galaxy A51?
Google Pixel 4a — 143 g for the Google Pixel 4a versus 172 g for the Samsung Galaxy A51.
Which is newer, Google Pixel 4a or Samsung Galaxy A51?
Google Pixel 4a — Aug 2020 for the Google Pixel 4a versus Dec 2019 for the Samsung Galaxy A51.
Is the Google Pixel 4a or the Samsung Galaxy A51 rated higher?
We rate the Google Pixel 4a 8/10 and the Samsung Galaxy A51 7/10.
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