Here is how the rumoured Xperia XZ4 compares to the Xperia XZ3, based on the speculation.
XZ4 vs XZ3 design
- Xperia XZ4: 166.9 x 72.4 x 8.2mm, 191g
- Xperia XZ3: 158 x 73 x 9.9mm, 193g
- IP65/68 expected on both
The Sony Xperia XZ4 is rumoured to further reduce the bezels at the top and bottom of its display compared to the Xperia XZ3, offering more screen within its footprint.
Leaked CAD renders and measurements suggest we will see a taller, slimmer and lighter build for the XZ4, along with a triple camera system on the back and the return of a side-mounted fingerprint sensor. The XZ3 has a single camera and slightly awkwardly-positioned rear-mounted fingerprint sensor.
Like the Xperia XZ3, the dedicated camera button at the bottom of the right edge remains on the XZ4 renders though, and USB Type-C is present in the centre at the bottom. It is also expected that Sony will offer IP65/68 water and dust resistance again.
The CAD images of the XZ4 don't show whether the new device will offer the same curved screen and the rear as the XZ3, but the XZ4 is expected to feature a glass rear again like its predecessor.
XZ4 vs XZ3 display
- Xperia XZ4: 6.5-inch, 21:9 ratio, 3360 x 1440 pixels, 562ppi
- Xperia XZ3: 6-inch, 18:9 ratio, 2880 x 1440 pixels, 537ppi
The Sony Xperia XZ4 is claimed to be coming with a larger display than its predecessor, with rumours of 6.5-inches, like the iPhone XS Max, rather than 6-inches like the Xperia XZ3.
It's thought the new model will offer a 21:9 aspect ratio display, with the screen said to measure 152mm tall. By comparison, the Xperia XZ3's display is around 136mm tall and has a 18:9 aspect ratio.
Sony is expected to opt for OLED for the XZ4's panel like the brilliant XZ3 however, and features including Mobile HDR compatibility, along with Sony's X-Reality and Triluminos technologies are also expected to be on board again.
The resolution is reported as 3360 x 1440 pixels for the XZ4, resulting in a pixel density of around 562ppi, making it slightly sharper than the XZ3 that has a 2880 x 1440 pixel resolution and a pixel density of 537ppi.
XZ4 vs XZ3 camera
- Xperia XZ4: Triple rear camera
- Xperia XZ3: Single 19MP Motion Eye rear camera
Rumours suggest the Sony Xperia XZ4 will come with a triple camera system on the rear. We'd expect this system to be comprised of a main sensor, a telephoto sensor for zoom and a depth sensor for bokeh effect images.
The Sony Xperia XZ3 has a single rear camera sensor, the 19-megapixel Motion Eye memory-stacked sensor, capable of 1080p super slow motion video at 960fps. On the front, it offers a 13-megapixel sensor.
There have been no reports indicating what sensor we can expect on the front of the XZ4, but we wouldn't be surprised to see the same as the XZ3 with software improvements.
AI features including predictive capture are also expected on the Xperia XZ4, as they have been on previous Sony flagships, but we'd expect a few improvements on the new device too.
Hardware and software
- Xperia XZ4: SD855, 6GB RAM, 128GB storage, 4400mAh
- Xperia XZ3: SD845, 4GB RAM, 64GB storage, 3300mAh
The Sony Xperia XZ4 will likely run on the Qualcomm Snapdragon 855 and it has been claimed it will offer 6GB of RAM and 128GB of storage, with microSD support up to 512GB.
The Sony Xperia XZ3 features the Snapdragon 845 and it too comes with 4GB of RAM and 64GB of storage with microSD support.
In terms of battery capacity, the Xperia XZ3 has a 3300mAh battery. It has been suggested the XZ4 will have a huge 4400mAh battery though. The XZ3 offers wireless and fast charging so the XZ4 will no doubt do the same.
The new handset will almost certainly launch on Android Pie too, like the XZ3, with Sony's software over the top offering features like Side Sense. We're expecting a few new features on the XZ4 too though.
For now, nothing is confirmed, but rumours suggest the Sony Xperia XZ4 will feature a larger display compared to its predecessor, upgraded hardware and an upgraded camera system.
We will continue to update this feature, along with our Sony Xperia XZ4 rumour round up as more leaks appear.