2024 Tiffin Allegro 34PA vs 2025 Newmar London Aire 4551

Detailed Comparison

Shopping for an RV and torn between the 2024 Tiffin Allegro 34PA and the 2025 Newmar London Aire 4551? We've put together a detailed spec comparison to help you decide.

Dimensionally, you're looking at 40.0 ft for the Tiffin Allegro 34PA and 35.5 ft for the Newmar London Aire 4551. The Tiffin Allegro 34PA carries an extra 15,500 lbs, which affects tow vehicle requirements and fuel economy.

Capacity-wise, expect to sleep 5 in the Tiffin Allegro 34PA versus 4 in the Newmar London Aire 4551. With 1 and 4 slide-outs respectively, the parked floor plans differ significantly.

Tank capacities are a key off-grid consideration. The Tiffin Allegro 34PA carries 86 gal of fresh water, 80 gal gray, and 44 gal black. The Newmar London Aire 4551 offers 73 gal fresh, 72 gal gray, and 43 gal black. The Tiffin Allegro 34PA has the edge for extended dry camping.

Budget-wise, the Tiffin Allegro 34PA is listed at $356,000 compared to $359,000 for the Newmar London Aire 4551.

For boondocking, the model with superior solar and battery setup will keep you comfortable off the grid longer. If you're going full-time, the larger tanks and more robust build quality matter enormously.

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