Motorola Razr 40 vs Realme C51 - Detailed Phone Comparison

Detailed Comparison

Specification
Motorola Razr 40
Motorola Razr 40
Motorola
Realme C51
Realme C51
Realme

General

Launch Date June 21, 2023 August 1, 2023
Release Year 2023 2023

Physical

Volume 93.53 cm³ 102.59 cm³
Screen Size to Weight Ratio 3.66 "/g 3.62 "/g
Weight 188.6 g 186 g
Height 170.8 mm 167.2 mm
Width 74 mm 76.7 mm
Thickness 7.4 mm 8 mm
Foldable Design Yes No
Available Colors
  • Sage Green
  • Vanilla Cream
  • Summer Lilac
  • Grape Compote
  • Cherry Blossom
  • Mint Green
  • Carbon Black

Display

Screen Size 6.9 " 6.74 "
Resolution 1080 x 2640 720 x 1600
Aspect Ratio 22:9 20:9
Screen-to-Body Ratio 85.2 % 85.5 %
Pixel Density 413 PPI 260 PPI
Refresh Rate 144 Hz 90 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness 1400 nits 560 nits

Hardware

Battery Capacity per Screen Area 88.22 mAh/in² 110.07 mAh/in²
Battery Density 44.91 mAh/cm³ 48.74 mAh/cm³
Battery Capacity 4200 mAh 5000 mAh
NFC Support Yes Yes
Chipset Qualcomm SM7450-AB Snapdragon 7 Gen 1 (4 nm) Unisoc Tiger T612 (12 nm)
CPU Octa-core (1x2.4 GHz Cortex-A710 & 3x2.36 GHz Cortex-A710 & 4x1.8 GHz Cortex-A510) Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
GPU Adreno 644 Mali-G57

Connectivity

USB Version 2.0 2.0
OTG Support 1
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 2.0 USB Type-C 2.0, OTG

Software

Operating System Android Android
Initial OS Version 13 13
Maximum OS Version 16

Comparison Summary

1. Specifications Comparison

FeatureMotorola Razr 40Realme C51Practical Impact
Design
Dimensions (mm)170.8 x 74 x 7.4 (folded)167.2 x 76.7 x 8Razr 40 significantly more compact when folded, easier to pocket; C51 thinner when unfolded.
Weight (g)188.6186Negligible weight difference.
FoldableYesNoRazr 40 offers a compact folded state and a larger inner screen.
Display
Display TypeFoldable LTPO AMOLEDIPS LCDRazr 40: Superior contrast, deeper blacks, power efficiency; C51: Potentially better visibility in direct sunlight.
Size (inches)6.9 (main), ~3.6 (cover)6.74Razr 40 provides a larger main display for immersive content; C51 offers a larger, always-on outer display.
Resolution1080 x 2640720 x 1600Razr 40: Sharper, more detailed image; C51: Lower resolution noticeable in everyday use, less demanding on GPU.
Refresh Rate (Hz)14490Razr 40: Smoother animations and scrolling; C51: Still provides a smooth experience compared to standard 60Hz displays.
Performance
ChipsetSnapdragon 7 Gen 1 (4nm)Unisoc Tiger T612 (12nm)Razr 40: Significantly more powerful CPU and GPU, better for demanding tasks and gaming; C51: Entry-level performance, sufficient for basic tasks.
RAM (GB)84Razr 40: Better multitasking, smoother performance with demanding apps; C51: Can handle basic tasks, but may struggle with heavy multitasking.
OSAndroid 13Android 13Similar software experience initially, but Razr 40 likely to receive longer updates thanks to established manufacturer support.
Camera
Main Camera (MP)6450Razr 40: Higher resolution main sensor; Image quality depends on sensor and processing, not just resolution. Practical differences require real-world camera comparisons.
Selfie Camera (MP)325Razr 40: Much higher resolution selfie camera, likely better quality for video calls and self-portraits.
Video Recording4K@30fps1080p@30fpsRazr 40: Higher resolution video recording capability.
Battery
Capacity (mAh)42005000C51: Larger battery capacity suggests longer battery life; real-world usage depends on factors like display, processor efficiency, and user habits. Foldable displays often consume more power.

2. Key Differences Analysis

Motorola Razr 40 Advantages:

  • Significantly more powerful: The Snapdragon 7 Gen 1 offers a major performance advantage for demanding tasks, gaming, and future-proofing.
  • Higher quality display: The foldable AMOLED provides superior contrast, vibrant colors, and a higher refresh rate for a smoother experience.
  • More compact when folded: The foldable design offers unmatched portability.
  • Higher resolution cameras: Potentially better image and video quality, particularly for selfies.

Realme C51 Advantages:

  • Larger battery capacity: Potentially longer battery life, important for users who prioritize all-day usage.
  • Lower price: Offers a budget-friendly option for basic smartphone needs.
  • Simpler, more robust design: Traditional slab design may be preferred by users who prioritize durability and ease of use.

Trade-offs:

  • Razr 40: Higher price, smaller battery capacity, potential durability concerns associated with foldable displays.
  • C51: Lower performance, lower resolution display, less versatile camera system.

3. User Profiles & Recommendations

Motorola Razr 40: Ideal for users who value portability, a premium display, strong performance, and are willing to pay a premium for a foldable design. Suitable for power users, content creators, and those who prioritize a compact device.

Realme C51: Best suited for budget-conscious users who prioritize basic communication, web browsing, and light media consumption. Ideal for students, seniors, or as a secondary device.

4. Decision Framework

Key Questions:

  1. What is your budget? The Razr 40 is significantly more expensive.
  2. What level of performance do you need? For demanding tasks and gaming, the Razr 40 is a clear winner.
  3. How important is portability and a premium display? The Razr 40's foldable design and AMOLED screen offer a unique advantage.

Scenario-Based Recommendations:

  • Heavy user, gamer, values latest technology: Motorola Razr 40
  • Budget-conscious, basic usage, long battery life: Realme C51

My Choice: Motorola Razr 40

While significantly more expensive, the Motorola Razr 40 offers a compelling combination of performance, portability, and a premium display. The Snapdragon 7 Gen 1 provides ample power for demanding tasks and future-proofing, while the foldable AMOLED screen is a significant upgrade over the C51's LCD. Although the battery capacity is smaller, I prioritize performance and portability. The unique form factor of the Razr 40, coupled with its powerful internals, makes it a more compelling device for my needs. The higher initial investment is justified by the superior overall user experience and longevity provided by the more powerful hardware and longer software support expected from Motorola.

Emily Harper
Emily Harper

Technology Insights Specialist

Dedicated technology writer specializing in mobile device analysis and technology communication. Expert at translating complex smartphone features into clear, actionable insights for diverse audiences.

Key Strengths:

  • Mobile technology analysis
  • Digital media communication
  • Technical storytelling
  • User-centric technology insights

Bridging technical complexity with engaging, accessible narratives.