The Astondoa 100 Century 2019 vs Astondoa 677 Coupe 2021 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
Size is the most obvious dividing line here. The Astondoa 100 Century 2019 measures 100,0 feet overall (2019), giving it roughly 37,9 additional feet of deck space compared to the Astondoa 677 Coupe 2021 at 62,1 feet (2021). Weight tells a clearer story for trailering families: the Astondoa 100 Century 2019 tips the scales at 220 462 lbs — 139 650 lbs more than the Astondoa 677 Coupe 2021 at 80 812 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.
The power gap is worth calling out. Rated to 2 186 hp, the Astondoa 100 Century 2019 has a 1 876-hp advantage over the Astondoa 677 Coupe 2021's 310-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Astondoa 100 Century 2019 carries 2 879 gallons versus 845 gallons in the Astondoa 677 Coupe 2021. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The Astondoa 100 Century 2019 is rated for 30 passengers, while the Astondoa 677 Coupe 2021 caps at 18. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Astondoa 100 Century 2019 could be the deciding factor.
Bottom line: Choose the Astondoa 100 Century 2019 if your priority is putting more people on the water — it handles 30 passengers and at 100,0 ft it has the deck room to back that rating up comfortably. The Astondoa 677 Coupe 2021 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 18 that costs less to run day-to-day.