Quick verdict
The Garmin dēzl OTR820 is our recommended choice for drivers who want more truck-specific tools. The Garmin dēzl OTR810 is a good alternative for drivers who do not need these additional features.
Both devices have an 8-inch screen with a resolution of 1280 × 800 pixels. They have the same dimensions, weight, and stated battery life. Both also support custom truck routing, satellite arrival imagery, PrePass, and live traffic updates.
The main differences are CAT Scale support, community-shared loading-dock information, and release year.
The OTR820 was released in 2024 and includes a CAT Scale locator and community-shared loading-dock information. The OTR810 was released in 2022 and does not include these two features.
For most drivers, the OTR820 offers more verified truck-specific tools without an increase in device size or weight.
Why choose Garmin dēzl OTR810?
Choose the Garmin dēzl OTR810 if you want an 8-inch truck GPS and do not need the additional tools of the OTR820.
The OTR810 has a screen resolution of 1280 × 800 pixels. It measures 7.87 × 4.92 × 0.79 inches and weighs 14.3 oz. These specifications are identical to those of the OTR820.
The OTR810 supports custom truck routing based on vehicle dimensions and weight. It also provides hazmat support, bridge height warnings, weight limit warnings, and steep grade alerts.
Additional features include satellite arrival imagery, truck parking information, PrePass support, and map updates. Live traffic, weather, and fuel prices are available through a compatible smartphone and the Garmin dēzl app.
The OTR810 has a stated battery life of up to 2 hours. This is the same as the OTR820.
However, the OTR810 does not include a CAT Scale locator or community-shared loading-dock information. These are two verified advantages of the newer model.
Choose the OTR810 if you want the same verified core navigation functions and can buy it at a lower price.
Why choose Garmin dēzl™ OTR820?
Choose the Garmin dēzl OTR820 if you want an 8-inch truck GPS with additional tools for daily truck operations.
The OTR820 was released in 2024, two years after the OTR810. It has the same screen size, resolution, dimensions, weight, and battery life as the older model.
The main advantage is its additional truck-specific information.
The OTR820 includes a CAT Scale locator. This can help you find CAT Scale locations when you need to weigh your truck.
It also provides community-shared loading-dock information. This feature can help you find truck entrances and loading areas before you arrive at unfamiliar delivery locations.
These tools can be useful if you make frequent deliveries or travel to locations that you do not know.
Like the OTR810, the OTR820 supports truck-specific routing, hazmat support, satellite arrival imagery, PrePass, and connected services through the Garmin dēzl app.
The newer release year does not confirm better routing accuracy, faster performance, or a better display. The supplied specifications do not establish these differences.
Choose the OTR820 if CAT Scale locations and community-shared loading-dock information are important for your work.
Garmin dēzl OTR810
An 8-inch dedicated truck GPS with custom truck routing, BirdsEye satellite arrival imagery, PrePass support and Garmin’s smartphone-connected traffic, weather and fuel-price services.
Garmin dēzl™ OTR820
An 8-inch dedicated truck GPS with custom truck routing, BirdsEye satellite arrival imagery, community truck-parking insights and Garmin’s connected trucking features.
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Key differences
CAT Scale locator
Community-shared loading docks
Release year
Full comparison
Rows with different values are highlighted. “Not verified” means TruckerDude has not confirmed that feature from a reliable source; it does not mean the feature is absent.
| Feature | Garmin dēzl OTR810 | Garmin dēzl™ OTR820 |
|---|---|---|
| Key specifications | ||
| Brand | Garmin | Garmin |
| Device type | Dedicated GPS | Dedicated GPS |
| Built-in dash cam | No | No |
| Release year | 2022 | 2024 |
| Screen size | 8 in | 8 in |
| Screen resolution | 1280 x 800 | 1280 x 800 |
| Dimensions | 7.87 × 4.92 × 0.79 in | 7.87 × 4.92 × 0.79 in |
| Weight | 14.3 oz | 14.3 oz |
| Battery life | 2 hours | 2 hours |
| Wi-Fi | Yes | Yes |
| Bluetooth | Yes | Yes |
| Connectivity | ||
| Live services connection | Smartphone app | Smartphone app |
| Smartphone app required | Yes | Yes |
| Map updates included | Yes | Yes |
| Truck navigation | ||
| Truck-specific routing | Yes | Yes |
| Truck height input | Yes | Yes |
| Truck weight input | Yes | Yes |
| Truck length input | Yes | Yes |
| Truck width input | Yes | Yes |
| Hazmat support | Yes | Yes |
| Bridge height warnings | Yes | Yes |
| Weight limit warnings | Yes | Yes |
| Steep grade warnings | Yes | Yes |
| Weigh station alerts | Yes | Yes |
| Connected & trucker features | ||
| PrePass support | Yes | Yes |
| CAT Scale | No | Yes |
| Truck parking | Yes | Yes |
| Satellite arrival imagery | Yes | Yes |
| Community loading docks | No | Yes |
| Live traffic | Yes | Yes |
| Live weather | Yes | Yes |
| Live fuel prices | Yes | Yes |
Final recommendation
We recommend the Garmin dēzl OTR820 for drivers who want the more complete set of verified truck-specific tools. Its CAT Scale locator and community-shared loading-dock information give it a functional advantage over the OTR810.
Choose the Garmin dēzl OTR810 if you do not need these additional features. It provides the same verified display specifications, battery life, truck navigation functions, and connected services.
If the OTR810 costs less, it can be the better value for drivers who only need the shared features. Compare current prices before you buy.
Neither model has a verified advantage in routing accuracy, screen resolution, or battery life.
Both GPS units can calculate routes based on truck dimensions and restrictions. However, map information can be incomplete or out of date. Always follow road signs and check bridge clearances, weight limits, and local restrictions.