Galaxy A51 vs A42: Which Samsung Reigns Supreme?

Versus
By Kylie Parker May 3, 2026
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Choosing between two capable mid-range smartphones can be a real head-scratcher. If you’re eyeing Samsung’s popular A-series, the Galaxy A51 and the Galaxy A42 often come up in the same conversation. Both offer compelling features at attractive price points, making the decision even tougher.

But which one truly stands out for your needs? We’re diving deep into the galaxy a51 vs a42 to help you make an informed choice. Get ready to uncover the key differences and see which device packs the better punch.

From camera prowess to battery life and overall performance, we’ll break down everything you need to know. Let’s find out which of these Samsung stars is the right fit for you.

Specs at a Glance

FeatureGalaxy A51A42
Display Size6.5 inches6.6 inches
Display TypeSuper AMOLEDSuper AMOLED
Resolution1080 x 2400720 x 1600
ProcessorExynos 9611Snapdragon 750G
RAM4GB/6GB/8GB4GB/5GB/8GB
Storage64GB/128GB64GB/128GB
Expandable StorageYes (microSD)Yes (microSD)
Rear Camera SetupQuadQuad
Main Rear Camera48MP48MP
Ultrawide Camera12MP8MP
Macro Camera5MP5MP
Depth Sensor5MP5MP
Front Camera32MP20MP
Battery Capacity4000 mAh5000 mAh
Fast Charging15W15W
5G ConnectivityNoYes
NFCYesYes
Headphone JackYesYes
Fingerprint SensorUnder DisplayUnder Display

Feature-by-Feature Breakdown

Display

  • Galaxy A51: Features a 6.5-inch Super AMOLED display with a resolution of 1080 x 2400 pixels. This offers vibrant colors, deep blacks, and excellent contrast, making it great for media consumption. The display is bright and sharp, providing a premium viewing experience for its class.
  • A42: Sports a 6.6-inch Super AMOLED display with a resolution of 720 x 1600 pixels. While still AMOLED, the lower resolution means it’s not as sharp as the A51, and pixelation might be noticeable upon close inspection. Colors are good, but the overall viewing experience is a step down.
  • Winner: galaxy a51

Processor & Performance

  • Galaxy A51: Powered by the Exynos 9611 chipset, paired with either 4GB, 6GB, or 8GB of RAM. This configuration offers smooth performance for everyday tasks, multitasking, and moderate gaming. It’s a capable chipset for its price range, generally handling most applications without significant lag.
  • A42: Equipped with the Snapdragon 750G 5G processor and 4GB or 6GB of RAM. This is a more powerful and modern chipset, especially for gaming and 5G connectivity. It offers a noticeable performance boost over the A51, handling demanding apps and games with greater ease.
  • Winner: a42

Camera System

  • Galaxy A51: Boasts a versatile quad-camera setup: a 48MP main sensor, 12MP ultrawide, 5MP macro, and 5MP depth sensor. This setup allows for a wide range of photography, from standard shots to ultrawide landscapes and close-up details. Image quality is generally good in well-lit conditions, with decent color reproduction.
  • A42: Features a quad-camera system: a 48MP main sensor, 8MP ultrawide, 5MP macro, and 2MP depth sensor. While the main sensor is the same resolution, the ultrawide and depth sensors are less capable than the A51. Photos are decent but can lack the detail and flexibility of the A51’s camera array.
  • Winner: galaxy a51

Battery Life

  • Galaxy A51: Comes with a 4000 mAh battery, supporting 15W fast charging. This battery size is adequate for a full day of moderate use, though heavy users might need a top-up. The charging speed is acceptable but not the fastest available.
  • A42: Packs a larger 5000 mAh battery, supporting 15W fast charging. The increased battery capacity translates to noticeably longer usage times, easily lasting a full day and often into the next for most users. This is a significant advantage for those prioritizing battery longevity.
  • Winner: a42

5G Connectivity

  • Galaxy A51: Does not support 5G connectivity. It is limited to 4G LTE networks, which is standard for its generation and price point.
  • A42: Is equipped with 5G connectivity. This makes it a more future-proof option, allowing for faster download and upload speeds on compatible networks, assuming availability in the user’s area.
  • Winner: a42

Design & Build

  • Galaxy A51: Features a plastic build with a glossy “Prism Crush” finish that mimics glass. It’s lightweight and comfortable to hold, with a slim profile and punch-hole cutout for the selfie camera. The design is modern and aesthetically pleasing for its segment.
  • A42: Also has a plastic build, but with a more textured, matte finish on the back that can help with grip and reduce fingerprints. It’s slightly thicker and heavier than the A51, likely due to the larger battery. The design is functional rather than overtly premium.
  • Winner: galaxy a51

Storage Options

  • Galaxy A51: Typically offered in 64GB, 128GB, and 256GB internal storage variants, all expandable via microSD card. This provides ample space for apps, photos, and videos. The higher storage options cater to users who store a lot of media.
  • A42: Usually comes with 64GB or 128GB of internal storage, also expandable via microSD. While it offers a good amount of space, the higher storage tiers are less common than on the A51. For most users, 128GB will be sufficient.
  • Winner: galaxy a51

Software & Updates

  • Galaxy A51: Launched with Android 10 and Samsung’s One UI, and has received subsequent updates. Samsung generally provides good software support for its A-series devices, offering several years of OS and security updates.
  • A42: Launched with Android 10 and Samsung’s One UI, and also benefits from Samsung’s update policy. As a slightly newer device, it might receive updates for a similar or slightly longer period. Both phones offer a polished and feature-rich software experience.
  • Winner: Tie

Winner by Category

CategoryWinner
Display Quality (Sharpness)Galaxy A51
Battery LifeA42
PerformanceA42
Camera VersatilityGalaxy A51
5G ConnectivityA42
Overall ValueA42

What They Have in Common

  • Display Technology: Both smartphones boast Super AMOLED displays, which are known for their vibrant colors, deep blacks, and excellent contrast ratios. This ensures an enjoyable viewing experience for media consumption and general use.
  • Expandable Storage: Users of both the Galaxy A51 and A42 can expand their storage beyond the internal options via a microSD card. This is a significant advantage for those who store many photos, videos, or apps.
  • Quad Rear Camera Systems: Both devices feature a versatile quad-camera setup on the rear, offering a primary wide lens, an ultrawide lens, a macro lens, and a depth sensor. This allows for a range of photographic styles and creative options.
  • Headphone Jack: For users who prefer wired headphones or need to connect audio devices without Bluetooth, both the A51 and A42 retain the convenient 3.5mm headphone jack.
  • Under-Display Fingerprint Sensor: Security and convenience are enhanced on both phones with the inclusion of an under-display fingerprint sensor, providing quick and secure unlocking.
  • Fast Charging Support: Both models support 15W fast charging, allowing users to quickly top up their batteries when needed, minimizing downtime.

Galaxy A51 Vs A42 Buying Guide

Performance and Everyday Use

When considering everyday tasks like browsing, social media, and light gaming, both the Galaxy A51 and A42 offer a competent experience. The A51, with its Exynos 9611 chipset, generally provides smooth operation for most common applications. The A42, powered by the Snapdragon 750G, often edges ahead in raw performance, especially for more demanding games or multitasking, thanks to its more powerful processor and 5G capabilities. If you prioritize slightly snappier app launches and a smoother gaming experience, the A42 holds a slight advantage. (See Also: Nintendo Switch Vs Switch Lite )

Camera Capabilities

Both devices boast versatile camera setups, but the Galaxy A51 often delivers slightly more refined image processing, particularly in its main 48MP sensor. It offers a good balance of detail and color accuracy in daylight. The A42’s 48MP main sensor is also capable, but sometimes images can appear a touch over-processed. Where the A42 does shine is in its inclusion of 5G, which is not directly camera-related but impacts overall user experience. For pure photography prowess in varied conditions, the A51 might be the preferred choice for casual photographers.

Display Quality

The display is a crucial aspect for smartphone interaction, and here, the Galaxy A51 typically takes the lead. It features a Super AMOLED panel, renowned for its vibrant colors, deep blacks, and excellent contrast. This makes watching videos and viewing photos a more immersive experience. The A42, on the other hand, utilizes an AMOLED display, which is still good but generally doesn’t reach the same level of visual punch as the A51’s Super AMOLED. For users who value a visually stunning screen, the A51 is the clear winner in this category.

Battery Life and Charging

Battery life is a strong suit for both the Galaxy A51 and A42, with both devices capable of easily lasting a full day for most users. The A51 comes with a 4000 mAh battery, while the A42 sports a larger 5000 mAh unit, giving it a slight edge in longevity. Both support 15W fast charging, meaning you can get back to a decent charge relatively quickly. However, the A42’s larger battery capacity combined with its efficient Snapdragon processor often translates to superior endurance, especially under heavier usage. (See Also: Pixel 6a Vs Iphone 12 )

Who Should Buy What?

Buy Galaxy A51 If…

  • You prioritize a sharper display resolution for more detailed visuals.
  • You want a more compact and potentially lighter device.
  • You are not concerned with 5G connectivity.
  • You prefer a slightly more premium build feel.

Buy A42 If…

  • 5G connectivity is a must-have for future-proofing and faster data speeds.
  • You want a significantly larger battery for longer usage times.
  • You are looking for a more powerful processor for smoother multitasking and gaming.
  • A slightly lower display resolution is acceptable for the other benefits.

Frequently Asked Questions

Which phone has a better display?

The Samsung Galaxy A51 generally boasts a superior display. It features a Super AMOLED panel known for its exceptional color vibrancy, deep blacks, and impressive contrast ratios. This translates to a more immersive viewing experience for media consumption and general use compared to the A42’s AMOLED display, which, while good, doesn’t quite reach the same peak in visual quality.

Is the A42 faster than the A51?

Yes, the Samsung Galaxy A42 is typically faster than the A51. The A42 is powered by the Qualcomm Snapdragon 750G chipset, which is a more powerful processor than the Exynos 9611 found in the A51. This difference is noticeable in demanding applications, gaming, and overall system responsiveness, especially considering the A42’s 5G capabilities.

Which phone has better cameras?

While both phones offer capable camera systems, the Galaxy A51 often has a slight edge in image processing and overall photo quality, particularly in its main sensor’s output. It tends to produce more natural-looking images with good detail and color accuracy in various lighting conditions. The A42’s cameras are good, but its processing can sometimes be a bit aggressive, leading to slightly less refined results for discerning photographers. (See Also: Galaxy Watch 6 Vs Active 2 )

Does the A42 have 5G?

Yes, the Samsung Galaxy A42 is equipped with 5G connectivity. This is one of its key selling points and a significant differentiator from the Galaxy A51, which is a 4G-only device. If having access to the faster speeds and lower latency of 5G networks is a priority for you, the A42 is the clear choice.

Which phone offers better battery life?

The Samsung Galaxy A42 generally offers better battery life due to its larger 5000 mAh battery compared to the A51’s 4000 mAh battery. While both phones provide all-day usage for most users, the A42’s bigger battery, combined with the efficiency of its Snapdragon processor, often translates to longer endurance, especially under moderate to heavy usage scenarios.

Final Verdict

The Galaxy A51 stands out with its superior Super AMOLED display and slightly more refined camera performance for everyday shots. However, the Galaxy A42 counters with a larger battery, significantly faster performance thanks to its Snapdragon 750G, and the crucial advantage of 5G connectivity. For future-proofing and a more powerful overall experience, the A42 is the more compelling option.

Winner: Galaxy A42