Quick verdict
The Garmin dēzl OTR820 is our recommended choice for drivers who want verified satellite arrival imagery and community loading dock information. The Rand McNally RANDTAB8 is better for drivers who want longer battery life and an Android-based navigation tablet.
Both devices have an 8-inch screen with a resolution of 1280 × 800 pixels. They support truck-specific routing, hazmat routing, PrePass, CAT Scale locations, and truck parking information. Both also provide map updates and live traffic, weather, and fuel prices.
The main differences are battery life, weight, device type, and the method used to connect to live services.
The Garmin weighs 14.3 oz and has a stated battery life of 2 hours. The Rand McNally weighs 16 oz and has a stated battery life of 5 hours.
For most drivers, the choice depends on arrival planning tools, battery life, and how they want to use connected services.
Why choose Garmin dēzl™ OTR820?
Choose the Garmin dēzl OTR820 if you want a dedicated truck GPS with verified tools for arrival planning.
The OTR820 includes satellite arrival imagery. This feature gives you an overhead view of your destination before you arrive. It can help you identify access roads, truck entrances, and loading areas.
The Garmin also provides community loading dock information. This can help you find loading areas at unfamiliar delivery locations.
These two features are verified for the Garmin but are not verified for the RANDTAB8. This does not mean that the Rand McNally device does not have them.
The OTR820 has an 8-inch screen with a resolution of 1280 × 800 pixels. It measures 7.87 × 4.92 × 0.79 inches and weighs 14.3 oz. It is slightly smaller and 1.7 oz lighter than the RANDTAB8.
The Garmin supports truck-specific routing, hazmat support, bridge height warnings, PrePass, and CAT Scale locations. These functions are also verified for the Rand McNally.
Live traffic, weather, and fuel prices are available through a compatible smartphone and the Garmin dēzl app.
The OTR820 has a stated battery life of up to 2 hours. This is shorter than the 5-hour battery life of the RANDTAB8.
Choose the OTR820 if verified satellite arrival imagery, community loading dock information, and lower device weight are your priorities.
Why choose Rand McNally RANDTAB8?
Choose the Rand McNally RANDTAB8 if you want an Android-based truck navigation tablet with longer battery life.
The RANDTAB8 has a stated battery life of up to 5 hours, compared with 2 hours for the Garmin OTR820. This gives you more time to use the device without vehicle power. It can be useful when you plan routes or check information away from your truck.
Another advantage is how the RANDTAB8 connects to live services. It uses Wi-Fi or an internet connection for live traffic, weather, and fuel prices. You do not need a dedicated smartphone companion app for these services. However, you still need an internet connection.
The RANDTAB8 has an 8-inch screen with a resolution of 1280 × 800 pixels. These display specifications are the same as those of the Garmin.
It measures 8 × 5.125 × 0.75 inches and weighs 16 oz. It is slightly thinner than the Garmin but is also wider, taller, and heavier.
The RANDTAB8 also includes a rear camera for image capture. However, this is not a built-in dash cam.
Like the Garmin, it supports truck-specific routing, hazmat support, PrePass, CAT Scale locations, truck parking, and live services.
Satellite arrival imagery and community loading dock information are not verified for the RANDTAB8. Do not assume that these functions are absent.
Choose the RANDTAB8 if longer battery life, Android tablet functions, and live services without a dedicated smartphone app are more important to you.
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.
Rand McNally RANDTAB8
An 8-inch Android-based truck-navigation tablet with custom truck routing, CAT Scale and truck-parking POIs, Wi-Fi-connected traffic, weather and fuel prices, plus a rear camera for image capture.
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Key differences
Device type
Live services connection
Smartphone app required
Battery life
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™ OTR820 | Rand McNally RANDTAB8 |
|---|---|---|
| Key specifications | ||
| Brand | Garmin | Rand McNally |
| Device type | Dedicated GPS | GPS / Android tablet |
| Built-in dash cam | No | No |
| Release year | 2024 | 2024 |
| Screen size | 8 in | 8 in |
| Screen resolution | 1280 x 800 | 1280 x 800 |
| Dimensions | 7.87 × 4.92 × 0.79 in | 8 × 5.125 × 0.75 in |
| Weight | 14.3 oz | 16 oz |
| Battery life | 2 hours | 5 hours |
| Wi-Fi | Yes | Yes |
| Bluetooth | Yes | Yes |
| Connectivity | ||
| Live services connection | Smartphone app | Wi-Fi / Internet |
| Smartphone app required | Yes | No |
| 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 | Yes | Yes |
| Truck parking | Yes | Yes |
| Satellite arrival imagery | Yes | Not verified |
| Community loading docks | Yes | Not verified |
| Live traffic | Yes | Yes |
| Live weather | Yes | Yes |
| Live fuel prices | Yes | Yes |
Final recommendation
We recommend the Garmin dēzl OTR820 for drivers who frequently travel to unfamiliar delivery locations. Its verified satellite arrival imagery and community loading dock information provide additional tools for arrival planning. Its lower weight and slightly smaller body can also make it easier to position in your truck cab.
Choose the Rand McNally RANDTAB8 if you want longer battery life and an Android-based navigation tablet. Its stated 5-hour battery life is a clear advantage over the Garmin’s 2 hours. It also connects to live services through Wi-Fi or an internet connection without a dedicated smartphone companion app.
Both devices have the same verified screen size, resolution, and core truck navigation functions. Neither has a verified advantage in routing accuracy.
Compare current prices, available mounting space, and your connection requirements before you buy.
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.