Matching a modified vee Zodiac Bayrunner 550 2013 against a inflatable rigid Zodiac Zoom 400 SR 2008 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 Zodiac Bayrunner 550 2013 measures 18,1 feet overall (2013), giving it roughly 5,1 additional feet of deck space compared to the Zodiac Zoom 400 SR 2008 at 13,0 feet (2008). Weight tells a clearer story for trailering families: the Zodiac Bayrunner 550 2013 tips the scales at 694 lbs — 440 lbs more than the Zodiac Zoom 400 SR 2008 at 254 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 — 40 hp for the Zodiac Bayrunner 550 2013 and 30 hp for the Zodiac Zoom 400 SR 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 Zodiac Bayrunner 550 2013 is rated for 12 passengers, while the Zodiac Zoom 400 SR 2008 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Zodiac Bayrunner 550 2013 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Zodiac Zoom 400 SR 2008 comes in at 9 lbs per hp versus 17 lbs per hp for the Zodiac Bayrunner 550 2013. 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 Zodiac Bayrunner 550 2013 has a documented top speed of 42 mph. Speed data wasn't available for the other model.
The Zodiac Bayrunner 550 2013 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Zodiac Zoom 400 SR 2008 is a rigid hull, which typically offers a more confident ride in chop and easier maintenance over the long term.
Bottom line: Choose the Zodiac Bayrunner 550 2013 if your priority is putting more people on the water — it handles 12 passengers and at 18,1 ft it has the deck room to back that rating up comfortably. The Zodiac Zoom 400 SR 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.