Samsung Galaxy A40 vs Samsung Galaxy A51

Our verdict: It's a split on display: the Samsung Galaxy A51 has the bigger 6.5" panel, but the Samsung Galaxy A40 is denser at 437 PPI. With 48MP on the rear, the Samsung Galaxy A51 has the higher-resolution camera. If selfies matter, the Samsung Galaxy A51 leads with a 32MP front-facing lens. At 140g, the Samsung Galaxy A40 is the lighter of the two.

Expert Rating
3.8
8 reviews
3.7
19 reviews
Screen
5.9" 6.5"
Display
AMOLED Super AMOLED
Resolution
1080 x 2340 1080 x 2400
Pixels Per Inch
437 405
Rear Camera
16 Megapixels 48 Megapixels
Front Camera
25 Megapixels 32 Megapixels
Chipset
Exynos 7885 Exynos 9611
Storage
64GB 64GB, 128GB
OS
Android Android
SIM Type
Nano SIM Nano SIM
Connectivity
Up to 4G Up to 4G
Wi-Fi
802.11 a/b/g/n/ac 802.11 a/b/g/n/ac
Bluetooth
5.0 with A2DP, LE 5.0 with A2DP, LE
Dimensions
144.4 x 69.2 x 7.9 mm 158.5 x 73.6 x 7.9 mm
Weight
140 grams 172 grams
Water Resistance
IP68 - Dust and water resistant over 1.5 meter and 30 minutes Not rated
Contracts
SIM-free
£69.95 £124.95
Samsung Galaxy A40 Samsung Galaxy A40 Samsung Galaxy A51 Samsung Galaxy A51
Expert Rating 3.8
8 reviews
3.7
19 reviews
Screen 5.9" 6.5"
Display AMOLED Super AMOLED
Resolution 1080 x 2340 1080 x 2400
Pixels Per Inch 437 405
Rear Camera 16 Megapixels 48 Megapixels
Front Camera 25 Megapixels 32 Megapixels
Chipset Exynos 7885 Exynos 9611
Storage 64GB 64GB, 128GB
OS Android Android
SIM Type Nano SIM Nano SIM
Connectivity Up to 4G Up to 4G
Wi-Fi 802.11 a/b/g/n/ac 802.11 a/b/g/n/ac
Bluetooth 5.0 with A2DP, LE 5.0 with A2DP, LE
Dimensions 144.4 x 69.2 x 7.9 mm 158.5 x 73.6 x 7.9 mm
Weight 140 grams 172 grams
Water Resistance IP68 - Dust and water resistant over 1.5 meter and 30 minutes Not rated
Contracts
SIM-free £69.95 £124.95
Deals Deals

Frequently Asked Questions

Which has the better screen, the Samsung Galaxy A40 or Samsung Galaxy A51?

The Samsung Galaxy A51 has the bigger screen at 6.5" compared to the Samsung Galaxy A40's 5.9", the Samsung Galaxy A40 has the sharper display at 437 pixels per inch versus 405, and the Samsung Galaxy A40 uses a AMOLED panel while the Samsung Galaxy A51 has a Super AMOLED.

Which has the better camera, the Samsung Galaxy A40 or Samsung Galaxy A51?

The Samsung Galaxy A40 features a 16 Megapixels rear camera, while the Samsung Galaxy A51 has a 48 Megapixels rear camera. Both devices also have front-facing cameras for selfies and video calls.

Which is cheaper to buy SIM-free, the Samsung Galaxy A40 or Samsung Galaxy A51?

The Samsung Galaxy A40 is cheaper SIM-free, starting from £69.95.

What storage options are available for the Samsung Galaxy A40 and Samsung Galaxy A51?

The Samsung Galaxy A40 is available in 64GB, while the Samsung Galaxy A51 comes in 64GB, 128GB.

What processors do the Samsung Galaxy A40 and Samsung Galaxy A51 use?

The Samsung Galaxy A40 is powered by the Exynos 7885, while the Samsung Galaxy A51 uses the Exynos 9611.

Which is easier to carry and hold, the Samsung Galaxy A40 or Samsung Galaxy A51?

The Samsung Galaxy A40 is the more portable of the two — it's 32g lighter at 140 grams, it's also the more compact phone at 144.4 x 69.2 x 7.9 mm.

Which is more water resistant, the Samsung Galaxy A40 or Samsung Galaxy A51?

The Samsung Galaxy A40 is rated IP68 - Dust and water resistant over 1.5 meter and 30 minutes, while the Samsung Galaxy A51 is rated Not rated.

What operating system do the Samsung Galaxy A40 and Samsung Galaxy A51 run?

Both phones run Android.