The Bennington 165 Si 2005 vs Bennington 18 SL 2013 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 — Bennington 165 Si 2005 at 16,0 ft versus Bennington 18 SL 2013 at 18,4 ft. Weight tells a clearer story for trailering families: the Bennington 18 SL 2013 tips the scales at 1 663 lbs — 288 lbs less than the Bennington 165 Si 2005 at 1 375 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 — 50 hp for the Bennington 165 Si 2005 and 50 hp for the Bennington 18 SL 2013. 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 Bennington 18 SL 2013 carries 26 gallons versus 2 gallons in the Bennington 165 Si 2005. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 7 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: The Bennington 18 SL 2013 at 18,4 ft is the right call if deck space, comfort, and entertaining are top of your list. The Bennington 165 Si 2005 at 16,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.