Realme C21Y vs Realme C51

A spec-by-spec comparison of the Realme C21Y and the Realme C51, taken from their full specification sheets. Green marks the better value in each measured row.

Realme C21Y smartphone

Realme C21Y

From ৳11,490
Full specs, price & review →
VS
Realme C51 smartphone

Realme C51

From ৳12,490
Full specs, price & review →

Head to head

Realme C21YRealme C51
Price৳11,490৳12,490
Our rating7/107/10
Battery5,000 mAh5,000 mAh
Wired charging10W33W
RAM (max)4 GB8 GB
Storage (max)64 GB256 GB
Screen size6.5 in6.74 in
Refresh rate—90 Hz
Main camera13 MP50 MP
Weight (lower is lighter)200 g186 g
ReleasedJul 2021Aug 2023
Summary: Realme C51 is ahead on wired charging, ram (max), storage (max), screen size.
★ Which should you buy? Realme C51 is the stronger overall pick on the measured specs. If budget matters more than the extra capability, Realme C21Y is the cheaper option.

Researched with AI assistance by infozme.com from manufacturer and retailer sources — see how we research & rate phones.

Display

Realme C21YRealme C51
TypeIPS LCD, 400 nits (typ)IPS LCD, 90Hz, 560 nits (peak)
Size6.5 inches6.74 inches, 109.7 cm2 (~85.5% screen-to-body ratio)
Resolution720 x 1600 pixels720 x 1600 pixels, 20:9 ratio (~260 ppi density)
ProtectionUnspecifiedCorning Gorilla Glass (unspecified version)

Platform

Realme C21YRealme C51
OSAndroid 10, Realme UI (upgradable to Android 11 in some regions)Android 13, Realme UI T Edition
ChipsetUnisoc T610 (12 nm)Unisoc Tiger T612 (12 nm)
CPUOcta-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
GPUMali-G52Mali-G57

Memory

Realme C21YRealme C51
Card slotmicroSDXC (dedicated slot)microSDXC (dedicated slot)
Internal32GB 3GB RAM, 64GB 4GB RAM64GB 3GB RAM, 64GB 4GB RAM, 128GB 4GB RAM, 128GB 8GB RAM, 256GB 6GB RAM (eMMC 5.1)

Main Camera

Realme C21YRealme C51
Triple13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, PDAF; 2 MP, f/2.4, (macro); 2 MP, f/2.4, (depth/B&W)—
FeaturesLED flash, HDR, panorama, Chroma Boost, Night Mode, Panoramic view, Expert, Timelapse, Portrait Mode, Ultra macro, AI Beauty, FilterLED flash, HDR, panorama
Video1080p@30fps1080p@30fps
Dual—50 MP, f/1.8, 27mm (wide), 1/2.76", 0.64µm, PDAF; 0.08 MP (auxiliary/depth sensor)

Selfie Camera

Realme C21YRealme C51
Single5 MP, f/2.2 (wide)5 MP, f/2.2, 28mm (wide), 1/5.0", 1.12µm
FeaturesHDR, panorama, Timelapse, Panoramic view, Beauty Mode, Face-Recognition, FilterHDR
Video1080p@30fps720p@30fps

Battery

Realme C21YRealme C51
TypeLi-Po 5000 mAh, non-removableLi-Po 5000 mAh, non-removable
Charging10W wired, Reverse charging33W wired, 50% in 28 min (advertised)

Body

Realme C21YRealme C51
Dimensions164.5 x 76 x 9.1 mm167.2 x 76.7 x 7.99 mm
Weight200g186 g
SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)
Colors—Carbon Black, Mint Green

Comms

Realme C21YRealme C51
WLANWi-Fi 802.11 b/g/n, hotspotWi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth5.0, A2DP, LE5.0, A2DP, LE
PositioningGPS, A-GPS, GLONASS, BDSGPS, GLONASS, GALILEO
NFCYes (region dependent)Yes (360-degree enabled, market/region dependent)
RadioFM Radio—
USBmicroUSB 2.0, OTGUSB Type-C 2.0

Launch

Realme C21YRealme C51
AnnouncedJuly 20212023, August
StatusAvailableAvailable. Released 2023, August

Frequently asked questions

Which has more RAM, Realme C21Y or Realme C51?

Realme C51 — 4 GB for the Realme C21Y versus 8 GB for the Realme C51.

Which is lighter, Realme C21Y or Realme C51?

Realme C51 — 200 g for the Realme C21Y versus 186 g for the Realme C51.

Which is newer, Realme C21Y or Realme C51?

Realme C51 — Jul 2021 for the Realme C21Y versus Aug 2023 for the Realme C51.

Is the Realme C21Y or the Realme C51 rated higher?

We rate the Realme C21Y 7/10 and the Realme C51 7/10.

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