When two boats share the same hull type — in this case both the Alumacraft Pro 175 2008 and the Alumacraft Tournament Pro 185 Tiller 2007 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 Pro 175 2008 at 17,0 ft versus Alumacraft Tournament Pro 185 Tiller 2007 at 18,0 ft. Weight tells a clearer story for trailering families: the Alumacraft Tournament Pro 185 Tiller 2007 tips the scales at 1 385 lbs — 1 373 lbs less than the Alumacraft Pro 175 2008 at 12 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 Pro 175 2008 and 90 hp for the Alumacraft Tournament Pro 185 Tiller 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 Alumacraft Pro 175 2008 carries 16 gallons versus 4 gallons in the Alumacraft Tournament Pro 185 Tiller 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 Alumacraft Tournament Pro 185 Tiller 2007 is rated for 5 passengers, while the Alumacraft Pro 175 2008 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Alumacraft Tournament Pro 185 Tiller 2007 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Alumacraft Pro 175 2008 comes in at 0 lbs per hp versus 15 lbs per hp for the Alumacraft Tournament Pro 185 Tiller 2007. 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 Alumacraft Tournament Pro 185 Tiller 2007 if your priority is putting more people on the water — it handles 5 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The Alumacraft Pro 175 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.