2025 Thor Aria 3901 vs 2024 Tiffin Allegro 32SA

Detailed Comparison

Two popular options on many shoppers' shortlists — the 2025 Thor Aria 3901 and the 2024 Tiffin Allegro 32SA. Let's see how they compare across the specs that matter most.

In terms of footprint, the Thor Aria 3901 stretches 35.0 ft while the Tiffin Allegro 32SA spans 27.0 ft. Weight-wise, the Thor Aria 3901 is the lighter rig at 16,800 lbs versus 25,900 lbs.

The Thor Aria 3901 sleeps 5 while the Tiffin Allegro 32SA accommodates 7. Slide-outs play a role in livability: the Thor Aria 3901 has 1 and the Tiffin Allegro 32SA has 4.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Tiffin Allegro 32SA at 93 gallons versus 91 gallons. Solar-wise, you get 600W on the Thor Aria 3901 and 400W on the Tiffin Allegro 32SA. Battery banks are 350 Ah and 350 Ah.

At $313,000 MSRP for the Thor Aria 3901 and $310,000 for the Tiffin Allegro 32SA, the Tiffin Allegro 32SA saves you $3,000. With only a 1% 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.

At the end of the day, the best RV is the one that fits your travel dreams and budget. Either of these is a worthy choice.