The Sylvan Avenger 1800 DC 2006 vs Sylvan Expedition Sport 1700 DC 2007 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.
On paper these two are close siblings in the size department — Sylvan Avenger 1800 DC 2006 at 18,0 ft versus Sylvan Expedition Sport 1700 DC 2007 at 17,0 ft. Weight tells a clearer story for trailering families: the Sylvan Avenger 1800 DC 2006 tips the scales at 1 295 lbs — 1 173 lbs more than the Sylvan Expedition Sport 1700 DC 2007 at 122 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.
Both boats share a closely matched power ceiling — 150 hp for the Sylvan Avenger 1800 DC 2006 and 135 hp for the Sylvan Expedition Sport 1700 DC 2007. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Sylvan Avenger 1800 DC 2006 carries 31 gallons versus 24 gallons in the Sylvan Expedition Sport 1700 DC 2007. 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 Sylvan Avenger 1800 DC 2006 is rated for 6 passengers, while the Sylvan Expedition Sport 1700 DC 2007 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sylvan Avenger 1800 DC 2006 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Sylvan Expedition Sport 1700 DC 2007 comes in at 1 lbs per hp versus 9 lbs per hp for the Sylvan Avenger 1800 DC 2006. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.
Bottom line: Choose the Sylvan Avenger 1800 DC 2006 if your priority is putting more people on the water — it handles 6 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The Sylvan Expedition Sport 1700 DC 2007 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.