The Tiara Yachts 3600 Open IPS 2009 is a modified-V design and the Tiara Yachts 3900 Convertible 2010 is a deep-V design, so you're likely deciding between two noticeably 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 Tiara Yachts 3900 Convertible 2010 measures 41,6 feet overall (2010), giving it roughly 5,6 additional feet of deck space compared to the Tiara Yachts 3600 Open IPS 2009 at 36,0 feet (2009). Weight tells a clearer story for trailering families: the Tiara Yachts 3900 Convertible 2010 tips the scales at 30 125 lbs - 11 025 lbs less than the Tiara Yachts 3600 Open IPS 2009 at 19 100 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 Tiara Yachts 3600 Open IPS 2009 carries a rated maximum of 370 hp. Engine data for the Tiara Yachts 3900 Convertible 2010 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Tiara Yachts 3900 Convertible 2010 carries 475 gallons versus 360 gallons in the Tiara Yachts 3600 Open IPS 2009. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Tiara Yachts 3900 Convertible 2010 is rated for 12 passengers, while the Tiara Yachts 3600 Open IPS 2009 caps at 11. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Tiara Yachts 3900 Convertible 2010 could be the deciding factor.