2025 Heartland Landmark 365 Newport vs 2024 Keystone Arcadia 378RL

Detailed Comparison

Two popular options on many shoppers' shortlists — the 2025 Heartland Landmark 365 Newport and the 2024 Keystone Arcadia 378RL. Let's see how they compare across the specs that matter most.

Dimensionally, you're looking at 38.5 ft for the Heartland Landmark 365 Newport and 34.5 ft for the Keystone Arcadia 378RL. The Keystone Arcadia 378RL carries an extra 800 lbs, which affects tow vehicle requirements and fuel economy.

The Heartland Landmark 365 Newport sleeps 10 while the Keystone Arcadia 378RL accommodates 8. Slide-outs play a role in livability: the Heartland Landmark 365 Newport has 2 and the Keystone Arcadia 378RL has 1.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Keystone Arcadia 378RL at 75 gallons versus 56 gallons. Solar-wise, you get 300W on the Heartland Landmark 365 Newport and 500W on the Keystone Arcadia 378RL. Battery banks are 350 Ah and 200 Ah.

At $89,000 MSRP for the Heartland Landmark 365 Newport and $87,000 for the Keystone Arcadia 378RL, the Keystone Arcadia 378RL saves you $2,000. With only a 2% price difference, the choice comes down to features rather than cost.

If you're traveling with a family, look for the model with more sleeping positions and better storage. Boondockers: look at the fresh water capacity and solar/battery systems — they determine how long you can stay out. For the full-time RV lifestyle, every gallon of tank capacity and every inch of counter space counts.

Whichever you choose, you'll be getting a capable rig. Just make sure to inspect one in person before signing.