When two boats share the same hull type — in this case both the Xpress H51 2008 and the Xpress HD16PF 2009 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 — Xpress H51 2008 at 17,0 ft versus Xpress HD16PF 2009 at 16,0 ft. Weight tells a clearer story for trailering families: the Xpress H51 2008 tips the scales at 905 lbs — 837 lbs more than the Xpress HD16PF 2009 at 68 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 Xpress H51 2008 has a 40-hp advantage over the Xpress HD16PF 2009's 50-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 Xpress HD16PF 2009 is rated for 5 passengers, while the Xpress H51 2008 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Xpress HD16PF 2009 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Xpress HD16PF 2009 comes in at 1 lbs per hp versus 10 lbs per hp for the Xpress H51 2008. 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 Xpress HD16PF 2009 if your priority is putting more people on the water — it handles 5 passengers and at 16,0 ft it has the deck room to back that rating up comfortably. The Xpress H51 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.