2025 Newmar London Aire 4551 vs 2025 American Coach American Eagle 45A

Detailed Comparison

Shopping for an RV and torn between the 2025 Newmar London Aire 4551 and the 2025 American Coach American Eagle 45A? We've put together a detailed spec comparison to help you decide.

The Newmar London Aire 4551 measures 35.5 ft in length at 17,700 lbs, compared to the American Coach American Eagle 45A's 26.5 ft and 27,200 lbs. GVWR ratings sit at 19,800 lbs and 29,400 lbs respectively.

Capacity-wise, expect to sleep 4 in the Newmar London Aire 4551 versus 4 in the American Coach American Eagle 45A. With 4 and 3 slide-outs respectively, the parked floor plans differ significantly.

Tank capacities are a key off-grid consideration. The Newmar London Aire 4551 carries 73 gal of fresh water, 72 gal gray, and 43 gal black. The American Coach American Eagle 45A offers 81 gal fresh, 65 gal gray, and 35 gal black. The American Coach American Eagle 45A has the edge for extended dry camping.

Budget-wise, the Newmar London Aire 4551 is listed at $359,000 compared to $360,000 for the American Coach American Eagle 45A.

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.

Take these specs as a starting point, then go see them in person — there's no substitute for stepping inside.