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Xperia 5 III vs Redmi K40

Sony Xperia 5 III vs Xiaomi Redmi K40

What Xperia 5 III does better (11) and where Redmi K40 wins (9) — every spec side by side.

Sony · 2021Xperia 5 III

8.0Score

11 advantages≈ $290

Higher score

Xiaomi · 2021Redmi K40

7.8Score

9 advantages≈ $300

7.6Display7.9

9.2Camera6.7

3.8Battery4.2

8.0Features8.7

Dimensions

Size comparison

Xperia 5 IIIRedmi K40

	Xperia 5 III	Redmi K40	Difference
Height	157 mm	163.7 mm	−6.7 mm
Width	68 mm	76.4 mm	−8.4 mm
Thickness	8.2 mm	7.8 mm	+0.4 mm
Weight	168 g	196 g	−28 g

Drawn to the same scale from the official dimensions (front and side).

Why is Xperia 5 III better than Redmi K40?

Optical stabilisationYes · Redmi K40: No
Telephoto cameraYes · Redmi K40: No
4K video frame rate120 fps vs 30 fps4×
Memory card slotYes · Redmi K40: No
3.5 mm headphone jackYes · Redmi K40: No
Weight168 g vs 196 g+17%
Pixel density449 ppi vs 395 ppi+14%
USB version3.1 vs 2+55%
Rear cameras3 vs 2+50%
Process5 nm vs 7 nm+40%
Main camera aperturef/1.7 vs f/1.8+6%

Why is Redmi K40 better than Xperia 5 III?

Main camera12 MP vs 48 MP4×
RAM8 GB vs 12 GB+50%
Selfie camera8 MP vs 20 MP2.5×
Wired charging30 W vs 33 W+10%
CPU frequency2.84 GHz vs 3.2 GHz+13%
Screen size6.1″ vs 6.7″+9%
Charged in 30 min50% vs 58%+16%
Screen-to-body ratio81.4% vs 85.9%+6%
Thickness8.2 mm vs 7.8 mm+5%

Specifications

Side by side

Only differences	Sony Xperia 5 III≈ $2908.0	Xiaomi Redmi K40≈ $3007.8
Design
Weight	168 g	196 g
Thickness	8.2 mm	7.8 mm
Height	157 mm	163.7 mm
Width	68 mm	76.4 mm
Frame	Aluminium	—
Back	Glass	—
Ingress protection	IP65	—
Water resistance (IPx)	IPx5	—
Glass protection	Corning Gorilla Glass 6	Corning Gorilla Glass 5
Colours	Black, Green, Pink	Black, White, Aurora
Display
Screen size	6.1″	6.7″
Panel	OLED	Super AMOLED
OLED panel	Yes	Yes
Resolution (width)	1,080 px	1,080 px
Resolution (height)	2,520 px	2,400 px
Pixel density	449 ppi	395 ppi
Refresh rate	120 Hz	120 Hz
Peak brightness	—	1,300 nits
Measured brightness	590 nits	—
Screen-to-body ratio	81.4%	85.9%
HDR	Yes	Yes
Performance
Chipset	Qualcomm SM8350 Snapdragon 888 5G	Qualcomm SM8250-AC Snapdragon 870 5G
Chip maker	Qualcomm	Qualcomm
Process	5 nm	7 nm
CPU cores	8	8
CPU frequency	2.84 GHz	3.2 GHz
GPU	Adreno 660	Adreno 650
AnTuTu score	708,394	—
Geekbench 6 (multi-core)	3,549	—
Memory
RAM	8 GB	12 GB
Storage (max)	256 GB	256 GB
Storage (base)	128 GB	128 GB
Storage type	UFS 3.	UFS 3.1
Memory card slot	Yes	No
Camera
Main camera	12 MP	48 MP
Main camera aperture	f/1.7	f/1.8
Main sensor size	1/1.7"	1/2.0"
Rear cameras	3	2
Optical stabilisation	Yes	No
Ultra-wide camera	Yes	Yes
Telephoto camera	Yes	No
Optical zoom	4.4×	—
Max video	4K	4K
4K video frame rate	120 fps	30 fps
Selfie camera	8 MP	20 MP
4K selfie video	No	No
Battery
Battery capacity	4,500 mAh	4,520 mAh
Battery type	Li-Po	Li-Po
Wired charging	30 W	33 W
Charged in 30 min	50%	58%
Wireless charging	No	No
Connectivity
5G	Yes	Yes
eSIM	No	No
Dual SIM	Yes	Yes
Wi-Fi standard	Wi-Fi 6	Wi-Fi 6
Bluetooth	5.2	5.1
NFC	Yes	Yes
USB	USB Type-C 3.1	USB Type-C 2.0
USB version	3.1	2
Video output	Yes	—
Dual-band GPS	—	Yes
Satellite navigation	GLONASS, GALILEO, BDS, QZSS	GLONASS, GALILEO, BDS, QZSS, NavIC
Features
Stereo speakers	Yes	Yes
3.5 mm headphone jack	Yes	No
Loudspeaker loudness	-26.7 LUFS	—
Fingerprint sensor	Side	Side
Barometer	Yes	—
Sensors	Fingerprint (side-mounted), accelerometer, gyro, proximity, barometer, compass	Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
Software
OS at launch	Android 11	Android 11
Platform	Android	Android
Interface	—	MIUI 12