2025 Jayco Greyhawk 30Z vs 2025 Jayco Seneca 37RB

Detailed Comparison

Two popular options on many shoppers' shortlists — the 2025 Jayco Greyhawk 30Z and the 2025 Jayco Seneca 37RB. Let's see how they compare across the specs that matter most.

The Jayco Greyhawk 30Z measures 28.0 ft in length at 10,800 lbs, compared to the Jayco Seneca 37RB's 27.5 ft and 11,300 lbs. GVWR ratings sit at 15,300 lbs and 13,600 lbs respectively.

The Jayco Greyhawk 30Z sleeps 8 while the Jayco Seneca 37RB accommodates 5. Slide-outs play a role in livability: the Jayco Greyhawk 30Z has 0 and the Jayco Seneca 37RB has 2.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Jayco Seneca 37RB at 57 gallons versus 50 gallons. Solar-wise, you get 150W on the Jayco Greyhawk 30Z and 350W on the Jayco Seneca 37RB. Battery banks are 100 Ah and 200 Ah.

At $200,000 MSRP for the Jayco Greyhawk 30Z and $224,000 for the Jayco Seneca 37RB, the Jayco Greyhawk 30Z saves you $24,000. With only a 12% 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.

No comparison can replace walking through each unit yourself. Visit a dealer and experience the layouts firsthand.