The Mercury 340 Sport 2007 vs Mercury PT850 2008 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.
Size is the most obvious dividing line here. The Mercury PT850 2008 measures 27,0 feet overall (2008), giving it roughly 16,0 additional feet of deck space compared to the Mercury 340 Sport 2007 at 11,0 feet (2007). Weight tells a clearer story for trailering families: the Mercury PT850 2008 tips the scales at 2 557 lbs — 2 434 lbs less than the Mercury 340 Sport 2007 at 123 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 500 hp, the Mercury PT850 2008 has a 485-hp advantage over the Mercury 340 Sport 2007's 15-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 Mercury PT850 2008 is rated for 26 passengers, while the Mercury 340 Sport 2007 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mercury PT850 2008 could be the deciding factor.
Bottom line: Choose the Mercury PT850 2008 if your priority is putting more people on the water — it handles 26 passengers and at 27,0 ft it has the deck room to back that rating up comfortably. The Mercury 340 Sport 2007 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.