Both the Tiara Yachts 3900 Convertible 2012 and the Tiara Yachts 4500 Sovran 2012 are deep-V designs, both built in fibreglass, so 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?
Size is the most obvious dividing line here. The Tiara Yachts 4500 Sovran 2012 measures 46,8 feet overall (2012), giving it roughly 5,3 additional feet of deck space compared to the Tiara Yachts 3900 Convertible 2012 at 41,6 feet (2012). Weight tells a clearer story for trailering families: the Tiara Yachts 3900 Convertible 2012 tips the scales at 30 125 lbs - 3 425 lbs more than the Tiara Yachts 4500 Sovran 2012 at 26 700 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 735 hp, the Tiara Yachts 4500 Sovran 2012 has a 135-hp advantage over the Tiara Yachts 3900 Convertible 2012's 600-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Tiara Yachts 3900 Convertible 2012 carries 475 gallons versus 350 gallons in the Tiara Yachts 4500 Sovran 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
The Tiara Yachts 3900 Convertible 2012 is rated for up to 12 people. Passenger data for the Tiara Yachts 4500 Sovran 2012 wasn't available.
Bottom line: The Tiara Yachts 4500 Sovran 2012 at 46,8 ft is the right call if deck space, comfort, and entertaining are top of your list. The Tiara Yachts 3900 Convertible 2012 at 41,6 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.