Matching a flat Alumaweld Flat Bottom 20 ft. 2010 against a modified vee Alumaweld Intruder Inboard 2009 means you're likely deciding between two genuinely different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
Size is the most obvious dividing line here. The Alumaweld Intruder Inboard 2009 measures 18,0 feet overall (2009), giving it roughly 16,0 additional feet of deck space compared to the Alumaweld Flat Bottom 20 ft. 2010 at 2,0 feet (2010). Weight tells a clearer story for trailering families: the Alumaweld Intruder Inboard 2009 tips the scales at 152 lbs — 138 lbs less than the Alumaweld Flat Bottom 20 ft. 2010 at 14 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 200 hp, the Alumaweld Intruder Inboard 2009 has a 85-hp advantage over the Alumaweld Flat Bottom 20 ft. 2010's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Alumaweld Intruder Inboard 2009 carries 47 gallons versus 3 gallons in the Alumaweld Flat Bottom 20 ft. 2010. 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 Alumaweld Flat Bottom 20 ft. 2010 comes in at 0 lbs per hp versus 1 lbs per hp for the Alumaweld Intruder Inboard 2009. 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.
The Alumaweld Intruder Inboard 2009 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Alumaweld Flat Bottom 20 ft. 2010 is a rigid hull, which typically offers a more confident ride in chop and easier maintenance over the long term.
Bottom line: The Alumaweld Intruder Inboard 2009 at 18,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Alumaweld Flat Bottom 20 ft. 2010 at 2,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.