BenQ W4100i: Specs, Throw Distance & Alternatives
A 4K UHD DLP home cinema projector with a 4LED light source, four-way lens shift and an included Android TV dongle. BenQ rates it at 3,200 ANSI lumens, and ProjectorCentral measured 19 ms input lag at 4K/60 in Fast Mode. It has a single 5 W speaker.
Is the BenQ W4100i right for you?
Good for
- Flexible placement: 0–60% vertical and ±15% horizontal lens shift with a 1.3x zoom
- Console gaming: 19 ms at 4K/60 and 15 ms at 1080p/120 (ProjectorCentral measurements)
- Streaming through the included Android TV (Android 11) dongle, with Netflix, YouTube, Prime Video and Disney+
- HDR10, HDR10+ and HLG content, with Wi-Fi 5, Bluetooth 5.0 and Google Cast
What to plan for
- Fast Mode, which gives the low lag, is not available with the AI Picture modes
- 4K/120 input is downscaled to 1080p/120
- A single 5 W mono speaker; HDMI 2 supports eARC for a soundbar
- Light source rated for 20,000 hours in Normal mode (30,000 in Eco)
Based on manufacturer specifications and published reviews (sources below). We don't do hands-on testing.
BenQ W4100i specs
| Resolution | 4K UHD (3840 × 2160, DLP) |
|---|---|
| Brightness | 3,200 ANSI lumens (BenQ rating; ProjectorCentral measured 3,240 in Bright mode) |
| Display technology | DLP |
| Light source | 4LED |
| Light source life | 20,000 hours |
| Contrast ratio | 3,000,000:1 (BenQ rating, full on/full off) |
| Throw ratio | 1.15-1.50:1 |
| Lens shift | Vertical 0–60%, horizontal ±15% |
| Max refresh rate | 240 Hz |
| HDMI ports | 3 (HDMI 2.1; eARC on HDMI 2) |
| Speakers | 5 W |
| Weight | 13.45 lb |
How far from the screen?
Lens-to-screen distance for a 16:9 image, calculated from its 1.15-1.50:1 throw ratio. The zoom lets you place it anywhere in the range.
| Screen | Closest | Farthest |
|---|---|---|
| 80″ | 6' 8" | 8' 9" |
| 100″ | 8' 4" | 10' 11" |
| 120″ | 10' 0" | 13' 1" |
| 150″ | 12' 6" | 16' 4" |
BenQ W4100i input lag by mode
| Signal | Input lag |
|---|---|
| 1080p / 240 Hz (Fast Mode) | 7 ms |
| 1080p / 120 Hz (Fast Mode) | 15 ms |
| 4K / 120 Hz input, shown at 1080p/120 (Fast Mode) | 15 ms |
| 4K / 60 Hz (Fast Mode) | 19 ms |
| 1080p / 60 Hz (Fast Mode) | 19 ms |
Source: measured by ProjectorCentral; BenQ rates 6.5 ms at 1080p/240, 13 ms at 1080p/120 and 17.9 ms at 60 Hz. Its fastest figure (7 ms at 1080p / 240 Hz (Fast Mode)) is quicker than 71 of the 96 projectors with a lag figure in our input lag database, which lists each model's fastest mode.
BenQ W4100i alternatives at a similar price
In-stock 4K projectors priced closest to it on Amazon today.
| Model | Price today | Amazon rating | Compare |
|---|---|---|---|
| BenQ W4100i (this one) | $2,499 | 4.5★ | — |
| AWOL Aetherion Pro 4K Projector | $2,499 | — | — |
| Hisense PX3-PRO Ultra Short Throw Triple Laser Projector | $2,498 | — | — |
| LG HU85LA 120” 4K UHD Resolution | $2,597 | 4.0★ | — |
| Hisense 120L5F Laser Cinema 4K Ultra Short Throw Laser Proje | $2,697 | 4.0★ | — |
BenQ W4100i head-to-head comparisons
- Optoma UHZ50e vs BenQ W4100i
Optoma’s low-lag 4K laser vs BenQ’s color-calibrated 4K LED
Where it fits
BenQ W4100i FAQ
- How far from the screen should the BenQ W4100i be for a 100-inch image?
- Between 8' 4" and 10' 11" from lens to screen, depending on the zoom setting (throw ratio 1.15-1.50:1).
- What is the input lag of the BenQ W4100i?
- 1080p / 240 Hz (Fast Mode): 7 ms; 1080p / 120 Hz (Fast Mode): 15 ms; 4K / 120 Hz input, shown at 1080p/120 (Fast Mode): 15 ms; 4K / 60 Hz (Fast Mode): 19 ms; 1080p / 60 Hz (Fast Mode): 19 ms. Source: measured by ProjectorCentral; BenQ rates 6.5 ms at 1080p/240, 13 ms at 1080p/120 and 17.9 ms at 60 Hz.
- Does the BenQ W4100i have lens shift?
- Yes. BenQ lists vertical lens shift of 0–60% and horizontal shift of ±15%, plus a 1.3x manual zoom.
Sources
Price, stock and rating come from Amazon and update automatically (last checked Nov 15, 2026, 12:00 AM).
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