When two boats share the same hull type — in this case both the Mercury DR400 2008 and the Mercury DR450 2008 are inflatable rigid designs with inflatable 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 — Mercury DR400 2008 at 13,0 ft versus Mercury DR450 2008 at 14,0 ft. At 313 lbs and 359 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
Both boats share a closely matched power ceiling — 40 hp for the Mercury DR400 2008 and 60 hp for the Mercury DR450 2008. 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.
For family outings this is probably the sharpest distinction between the two. The Mercury DR450 2008 is rated for 7 passengers, while the Mercury DR400 2008 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mercury DR450 2008 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Mercury DR450 2008 comes in at 6 lbs per hp versus 8 lbs per hp for the Mercury DR400 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 Mercury DR450 2008 if your priority is putting more people on the water — it handles 7 passengers and at 14,0 ft it has the deck room to back that rating up comfortably. The Mercury DR400 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.