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Samsung Galaxy A51 vs Xiaomi Redmi Note 8

Compare recorded specifications, size and practical differences.

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    Key differences

    Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

    • Display technology

      OLED versus LCD

      Galaxy A51:
      OLED
      Redmi Note 8:
      LCD

    • Weight

      Galaxy A51: 18 g lighter

      Galaxy A51:
      172 g
      Redmi Note 8:
      190 g

    • Width

      Galaxy A51: 1.7 mm narrower

      Galaxy A51:
      73.6 mm
      Redmi Note 8:
      75.3 mm

    • Screen diagonal

      Redmi Note 8: 0.2 in smaller diagonal

      Galaxy A51:
      6.5 in
      Redmi Note 8:
      6.3 in

    • Chipset

      Galaxy A51:
      Exynos 9611 (10nm)
      Redmi Note 8:
      Qualcomm SDM665 Snapdragon 665 (11 nm)

    • Depth

      Galaxy A51: 0.5 mm thinner

      Galaxy A51:
      7.9 mm
      Redmi Note 8:
      8.4 mm

    Physical size

    Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

    1. 1. Galaxy A51

      Height:
      158.5 mm
      Width:
      73.6 mm
      Depth:
      7.9 mm

    2. 2. Redmi Note 8

      Height:
      158.3 mm
      Width:
      75.3 mm +1.7 mm versus Galaxy A51
      Depth:
      8.4 mm +0.5 mm versus Galaxy A51

    Weight

    Bars start at zero and share a scale within this chart.

    1. 1. Galaxy A51

      172 g

    2. 2. Redmi Note 8

      190 g

      +18 g versus Galaxy A51

    Screen size

    Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

    1. 1. Galaxy A51

      Screen diagonal:
      6.5 in
      Aspect ratio (height:width):
      20:9
      Approximate rectangular screen area:
      102 cm²

    2. 2. Redmi Note 8

      Screen diagonal:
      6.3 in
      Aspect ratio (height:width):
      19.5:9
      Approximate rectangular screen area:
      97.4 cm²

    Galaxy A51 has approximately 4.7% more rectangular screen area than Redmi Note 8.

    Memory variants

    Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

    Recorded RAM for Galaxy A51, Redmi Note 8, compared at the same storage capacity.
    StorageGalaxy A51Redmi Note 8
    32 GB Not recorded 3 GB RAM
    64 GB Recorded for all phones 4 GB RAM 4 / 6 GB RAM Alternative RAM configurations
    128 GB Recorded for all phones 4 / 6 / 8 GB RAM Alternative RAM configurations 4 / 6 GB RAM Alternative RAM configurations

    Practical features

    Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

    1. Galaxy A51

    NFC:
    Yes
    Headphone jack:
    Yes
    Memory card support:
    See details microSD · up to 1 TB (dedicated slot)

    2. Redmi Note 8

    NFC:
    Unknown
    Headphone jack:
    Yes
    Memory card support:
    See details microSD · up to 256 GB (dedicated slot)

    Battery capacity

    Capacity is not battery life. No endurance test is implied.

    Recorded battery capacity

    Bars start at zero and share a scale within this chart.

    1. 1. Galaxy A51

      4000 mAh

    2. 2. Redmi Note 8

      4000 mAh

    Specifications

    Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

    1. Galaxy A512. Redmi Note 8

    Everyday essentials
    Everyday essentials — specifications for Galaxy A51, Redmi Note 8.
    SpecificationGalaxy A51Redmi Note 8
    Dimensions (HxWxD)
    • 158.5 Х 73.6 Х 7.9 mm
    • 158.3 Х 75.3 Х 8.4 mm
    Weight
    • 172 g
    • 190 g
    Technology
    • Super AMOLED
    • IPS LCD
    Screen size
    • 6.5" inch
    • 6.3" inch
    Screen resolution
    • 1080 x 2400 px
    • 1080 x 2340 px
    Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
    • 64GB 4GB RAM
    • 128GB 4GB RAM
    • 128GB 6GB RAM
    • 128GB 8GB RAM
    • 32GB 3GB RAM
    • 64GB 4GB RAM
    • 64GB 6GB RAM
    • 128GB 4GB RAM
    • 128GB 6GB RAM
    Memory card support
    • microSD
    • up to 1 TB (dedicated slot)
    • microSD
    • up to 256 GB (dedicated slot)
    Battery Capacity is not battery life. No endurance test is implied.
    • 4000 mAh
    • Non-removable Li-Po
    • 4000 mAh
    • Non-removable Li-Po
    Operating system OS
    • Android 10.0; One UI 2
    • Android 9.0 (Pie); MIUI 10
    Chipset
    • Exynos 9611 (10nm)
    • Qualcomm SDM665 Snapdragon 665 (11 nm)
    NFC
    • Yes
    		 Unknown
    Headphone jack
    • Yes
    • Yes
    Display
    Display — specifications for Galaxy A51, Redmi Note 8.
    SpecificationGalaxy A51Redmi Note 8
    Touchscreen
    • capacitive touchscreen
    • capacitive touchscreen
    Display colors
    • 16M
    • 16M
    Screen area
    • 102.0 cm2
    • 97.4 cm2
    Screen format
    • 20:9 (height:width)
    • 19.5:9 (height:width)
    Screen to body ratio
    • 87.4%
    • 81.7%
    PPI /points per inch/
    • 405 PPI
    • 409 PPI
    Screen protection
    • Corning Gorilla Glass 3
    • Corning Gorilla Glass 5
    Camera and Video
    Camera and Video — specifications for Galaxy A51, Redmi Note 8.
    SpecificationGalaxy A51Redmi Note 8
    Rear camera, main
    • 48 MP
    • Quad
    • 48 MP
    • Quad
    Camera specs
    • 48 MP
    • f/2.0
    • 26mm (wide)
    • 1/2.0"
    • 0.8µm
    • PDAF -12 MP
    • f/2.2
    • 12mm (ultrawide) -5 MP
    • f/2.4
    • 25mm (macro)
    • 1/5.0"
    • 1.12µm -5 MP
    • 1.12µm
    • depth sensor
    • 48 MP
    • f/1.8
    • 26mm (wide)
    • 1/2"
    • 0.8µm
    • PDAF -8 MP
    • f/2.2
    • 13mm (ultrawide)
    • 1/4"
    • 1.12µm -2 MP
    • f/2.4
    • 1/5"
    • 1.75µm (dedicated macro camera) -2 MP
    • 1.75µm
    • depth sensor
    Functions
    • HDR
    • HDR
    • panorama
    Video
    • 1080p@30fps
    • 1080p@30fps
    Front camera, selfie
    • 32 MP
    • Single
    • 13 MP
    • Single
    Specifications
    • 32 MP
    • f/2.2
    • 26mm (wide)
    • 1/2.8"
    • 0.8µm
    • 13 MP
    • f/2.0
    • 1.12µm
    Performance

    Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

    Performance — specifications for Galaxy A51, Redmi Note 8.
    SpecificationGalaxy A51Redmi Note 8
    Processor CPU
    • Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)
    • Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
    Graphics processor GPU
    • Mali-G72 MP3
    • Adreno 610
    Antutu 7 score *
    • 155326
    • 143740
    GeekBench 4 Single Core * Unknown
    • 1499
    GeekBench 4 Multi-Core * Unknown
    • 5543
    Antutu 8 score *
    • 186846
    • 173592
    GeekBench 5 Single Core *
    • 322
    • 309
    GeekBench 5 Multi-Core *
    • 1212
    • 1328
    General specs
    General specs — specifications for Galaxy A51, Redmi Note 8.
    SpecificationGalaxy A51Redmi Note 8
    Release date
    • 2019
    • December
    • 2019
    • August
    Colors
    • Prism Crush Black
    • White
    • Blue
    • Pink
    • Neptune Blue
    • Moonlight White
    • Space Black
    Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
    • $280
    • 190 EUR
    Battery life
    • Talking time- Up to 32 h (3G) Music play - Up to 87 h
    		 Unknown
    Body build
    • Glass front (Gorilla Glass 3)
    • plastic back
    • plastic frame
    • Front/back glass (Gorilla Glass 5)
    Communication and Connectivity
    Communication and Connectivity — specifications for Galaxy A51, Redmi Note 8.
    SpecificationGalaxy A51Redmi Note 8
    SIM card
    • Single SIM (Nano-SIM)Dual SIM (Nano-SIM
    • dual stand-by)
    • Dual SIM (Nano-SIM
    • dual stand-by)
    Network
    • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) -3G - HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE (unspecified)
    • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 2100 -4G - LTE band 1(2100)
    • 3(1800)
    • 5(850)
    • 8(900)
    • 38(2600)
    • 40(2300)
    • 41(2500)
    Speed
    • HSPA
    • LTE-A
    • HSPA 42.2/11.5 Mbps
    • LTE-A
    GPRS
    • Yes
    • Yes
    Edge
    • Yes
    • Yes
    Wi-Fi
    • 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
    • hotspot
    GPS
    • Yes
    • with A-GPS
    • GLONASS
    • GALILEO
    • BDS
    • Yes
    • with A-GPS
    • GLONASS
    • BDS
    USB
    • 2.0
    • Type-C 1.0 reversible connector
    • USB On-The-Go
    • 2.0
    • Type-C 1.0 reversible connector
    • USB On-The-Go
    Bluetooth
    • 5.0
    • A2DP
    • LE
    • 4.2
    • A2DP
    • LE
    Harmful irradiation
    • SAR - 0.80 W/kg (head) 0.67 W/kg (body) SAR EU - 0.37 W/kg (head) 1.59 W/kg (body)
    • SAR - 0.26 W/kg (head) 1.00 W/kg (body) SAR EU - 0.26 W/kg (head) 1.00 W/kg (body)
    Music and Audio
    Music and Audio — specifications for Galaxy A51, Redmi Note 8.
    SpecificationGalaxy A51Redmi Note 8
    Radio
    • FM radio
    • FM radio
    Others
    • Active noise cancellation with dedicated mic
    		 Unknown
    Other features
    Other features — specifications for Galaxy A51, Redmi Note 8.
    SpecificationGalaxy A51Redmi Note 8
    Dop
    • Sensors Fingerprint (under display
    • optical)
    • accelerometer
    • gyro
    • proximity
    • compass - ANT+ - Fast battery charging 15W - Versions: SM-A515F/DSN (Global); SM-A515F/DS (LATAM); SM-A515F/DST (Brazil); SM-A515F/DSM (Russia); SM-A515F/N (Australia)
    • Sensors Fingerprint (rear-mounted)
    • accelerometer
    • gyro
    • proximity
    • compass
    • Infrared port - Fast battery charging 18W

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