When two boats share the same hull type — in this case both the Alumacraft Fisherman 145 CS 2010 and the Alumacraft Navigator 165 CS 2010 are deep vee designs with aluminum construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department — Alumacraft Fisherman 145 CS 2010 at 14,8 ft versus Alumacraft Navigator 165 CS 2010 at 16,7 ft. Weight tells a clearer story for trailering families: the Alumacraft Navigator 165 CS 2010 tips the scales at 965 lbs — 363 lbs less than the Alumacraft Fisherman 145 CS 2010 at 602 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 90 hp, the Alumacraft Navigator 165 CS 2010 has a 55-hp advantage over the Alumacraft Fisherman 145 CS 2010's 35-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

For family outings this is probably the sharpest distinction between the two. The Alumacraft Navigator 165 CS 2010 is rated for 5 passengers, while the Alumacraft Fisherman 145 CS 2010 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Alumacraft Navigator 165 CS 2010 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Alumacraft Navigator 165 CS 2010 comes in at 11 lbs per hp versus 17 lbs per hp for the Alumacraft Fisherman 145 CS 2010. 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.