The Nitro 640 LX 2005 vs Nitro 750 2007 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.

On paper these two are close siblings in the size department - Nitro 640 LX 2005 at 16,0 ft versus Nitro 750 2007 at 17,0 ft. Weight tells a clearer story for trailering families: the Nitro 750 2007 tips the scales at 1 350 lbs - 258 lbs less than the Nitro 640 LX 2005 at 1 092 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 Nitro 640 LX 2005 and 90 hp for the Nitro 750 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 Nitro 750 2007 carries 30 gallons versus 24 gallons in the Nitro 640 LX 2005. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 4 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 Nitro 640 LX 2005 comes in at 12 lbs per hp versus 15 lbs per hp for the Nitro 750 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.