When two boats share the same hull type — in this case both the Alumacraft Navigator 165 CS 2007 and the Alumacraft Tournament Pro 175 2006 are modified 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 Navigator 165 CS 2007 at 16,0 ft versus Alumacraft Tournament Pro 175 2006 at 17,0 ft. Weight tells a clearer story for trailering families: the Alumacraft Tournament Pro 175 2006 tips the scales at 1 385 lbs — 420 lbs less than the Alumacraft Navigator 165 CS 2007 at 965 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 — 90 hp for the Alumacraft Navigator 165 CS 2007 and 90 hp for the Alumacraft Tournament Pro 175 2006. 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 Alumacraft Tournament Pro 175 2006 carries 34 gallons versus 22 gallons in the Alumacraft Navigator 165 CS 2007. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 5 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.
At this size, power-to-weight ratio matters more than outright horsepower. The Alumacraft Navigator 165 CS 2007 comes in at 11 lbs per hp versus 15 lbs per hp for the Alumacraft Tournament Pro 175 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: The Alumacraft Navigator 165 CS 2007 and Alumacraft Tournament Pro 175 2006 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.