Compare phones
| Global Score | |
| 65 | 71.1 |
| Basic Information | |
| Acer | LG |
| Android 4.2.2 | Android 10 |
| -- | 2020-05-06 |
| 6.54 x 3.39 x 0.35 inches | 6.57 x 3.07 x 0.33 inches |
| 8.15 ounces | 7.17 ounces |
| Black and Red | Titan gray |
| Scratch-Resistant Glass | -- |
| $ 249.00 | $ 174.00 |
| Display / Screen | |
| 6 inches | 6.5 inches |
| 1920 x 1080 pixels (Full HD) | 1560 x 720 pixels |
| IPS LCD | IPS LCD |
| 367 pixels per inch | 264 pixels per inch |
| Capacitive, Multi-touch | No touch screen |
| 8.3 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 800 chipset | MediaTek Helio P22 MT6762 chipset |
| Krait 400 (Quad-Core 2200 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 2 GB RAM | 3 GB RAM |
| Adreno 330 (450 MHz) GPU | IMG PowerVR GE8320 GPU |
| 9.18 | 9.09 |
| Storage | |
| 16 GB internal memory | 32 GB internal memory |
| microSD, microSDHC, microSDXC external memory slot | microSDXC (up to 1,95 TB) external memory slot |
| 4.4 | 12.76 |
| Camera | |
| 13.00 MP + 2.00 MP | 13.00 MP + 13.00 MP |
| f/2.20 aperture | f/1.80 aperture |
| 28.00mm focal length | -- |
| -- | 0.33 inches (1/3") sensor |
| 3840 x 2160 (4K) video resolution | 1920 x 1080 (Full HD) video resolution |
| 7.81 | 8.14 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, EDGE, GPRS and GSM | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM | Nano SIM |
| 7 | 6.7 |
| Battery Life | |
| 3300mAh Li-Polymer Battery | 4000mAh Li - Ion Battery |
| Removable Battery | Non-Removable Battery |
| 5.28 | 5.92 |
| Other Features | |
| Bluetooth 4.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
LG K51 is slightly better than Acer Liquid S2, with a overall score of 71.1 against 65. Both phones in this review come with Android OS, but the LG K51 has an older 10 version while Acer Liquid S2 has Android 4.2.2. LG K51's construction is lighter and a little thinner than Acer Liquid S2. Acer Liquid S2 counts with a more vivid display than LG K51, because although it has a little bit smaller display, it also counts with a better 1080 x 1920 resolution and a greater quantity of pixels per screen inch.
Acer Liquid S2 counts with a bit superior processor than LG K51, because although it has 4 lesser processing cores (although faster) and lesser RAM memory, it also counts with a graphics processing unit. LG K51 takes a bit better photographs and videos than Acer Liquid S2, and although they both have the same video frame rates, the same (Full HD) video quality and a same resolution back camera, the LG K51 also has a larger aperture.
The LG K51 has a way bigger memory capacity to store more apps and games than Acer Liquid S2, because it has 32 GB internal storage capacity. LG K51 has superior battery lifetime than Acer Liquid S2, because it has 4000mAh of battery capacity.
Despite of being the best phone in this comparison, LG K51 is also a bargain compared to the other ones.
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