The 86UQ91006LA is a 86 inch 4K TV from LG, launched in the year 2022. It features a 10-bit IPS panel.
The max. resolution it can achieve is 3840 x 2160 @ 120 Hz with a pixel density of 51 ppi.
Picture Quality
After screen size and resolution, the next most important spec of a display is its Color Reproduction Accuracy (defined by its color gamut specification).
This TV doesn't provide a color gamut specification, so we have to make an assumption based on its panel type. Now, since the TV features a 86 inch screen, it won't come with a cheap panel, so here we can assume its equivalent sRGB coverage to be 90-100% or above. Undoubtedly The color accuracy on this TV should be Lifelike! It will produce accurate colors out of the box.
Understanding the Color Gamut Specification
Color gamut specification of a display indicates the range of colors that the TV can display.
Meaning, this specification determines the ability of a display to produce accurate colors. A display with low color gamut coverage will miss out on some colors (such as deep red), so the image produced will look "washed out" in colors.
It is specified in different units - sRGB,sRGB (standard RGB), NTSC 1953, DCI P3 to name a few.
But don't worry, below is a chart that you can use to choose a TV with good color accuracy.
After color gamut, you should look at the static contrast specification as it influences the picture quality substantially.
Understanding the static contrast specification
A TV with high enough static contrast ratio will produce deep blacks while a TV with low contrast ratio (<1000:1) will produce images that will look muddy as shown in below image.

As you imagine, this will impact your experience considerably.
Also note, static contrast ratio and resolution go hand in hand when it comes to details. To put it into perspective, a TV with low contrast ratio will produce less shades of colors, so lesser detail overall.
If given a choice, always prefer a FHD TV with high contrast ratio over a 4K TV with low contrast ratio.
LG did not state a static contrast specification for this TV. Again we have to take a guess. FYI — IPS panels come with a static contrast ratio between 700:1 - 1500:1. As for a 4K TV, we can assume the ratio of LG 86UQ91006LA would be on the upper side, that is atleast 1200:1.
HDR10 Pro and HLG (Hybrid Log Gamma) are also supported on this TV, so that's a plus.
Coming to brightness, it is capable of producing a maximum brightness of 250 nits, powered by Direct LED backlight.
Gaming Performance
If you are not interested in gaming, you can ignore these specs. But if you are also going to use the TV for gaming or use it as a PC monitor, make sure to get a TV that features the lowest input lag and response time.
Sadly, we cannot find the input lag specification for this unit. But since this is not a cheap TV from LG, input lag on this TV could be 20ms or below.
What is Input lag ?
This lag is the amount of time at which your key-presses/mouse movements changes the content of your TV. For casual Non-FPS games, input lag doesn't matter much.
But ideally, look for a TV that has an input lag and response time of < 20ms.
Ergonomics and Dimensions
Now, coming to ergonomics — a VESA mount with interface size of 600 x 400 mm is provided for wall-mounting. There is no Swivel, Tilt or Pivot feature support on this TV.
Vertically, the TV measures 86 inches and horizontally 75.87 inches. It is 2.36 inches thick. In total it weighs 48.9 KGs (including stand). Without stand, it weighs 45.2 kgs.
Hardware and Audio
The core of LG 86UQ91006LA is powered by Quad Core CPU. However, we could'nt find any information on the RAM on the TV's specsheet.
Speaking of OS, the LG 86UQ91006LA runs webOS 22 Operating System.
For display connectivity, there are two HDMI 2.0 ports and two HDMI 2.1 ports on this TV.
To connect USB devices, you will have two USB 2.0 ports. Other connectivity ports include — 1x CI+ 2.0, 1x Antenna (RF) (female), 1x Satellite In (F-type female) and 1x Ethernet RJ45.
Wireless connectivity options on this TV include Wi-Fi (5Ghz + 2.5Ghz), Wifi-Direct, Bluetooth 5.0 and DLNA.
The Audio unit of this TV is powered by 2 x 10W built-in speakers.
Now, coming to power usage, it consumes 168W on average and 0.5W on standby.
It supports a power outlet of 220 V - 240 V/50 Hz - 60 Hz.