Granfort 370 GTXvs.Tiara 34 LS
What buyers need to know.
This guide is for buyers cross-shopping a 37-foot sport cruiser against one of the most iconic names in American luxury day yachting. Tiara has built its reputation over 50 years in Holland, Michigan — that heritage is real and it shows in the boat. The question this guide answers isn't whether Tiara builds a beautiful yacht. It's whether that heritage is worth roughly $150,000–$260,000 more than a comparably equipped Granfort, tested on the exact same twin 400 HP Mercury Verado power.
This guide is for buyers who want to know what Tiara's name actually costs them.
Tiara Yachts is one of the oldest privately held, family-owned boat builders in America — founded in 1974 by Leon Slikkers in Holland, Michigan, still run by the Slikkers family, and turning out roughly 150 handcrafted yachts a year across its entire lineup. The 34 LS carries that heritage: a walk-around dayboat with an outdoor galley, a convertible sunpad, and the unmistakable Tiara hull shape. None of that is in dispute.
What buyers rarely get to see clearly is the price. Tiara doesn't publish an MSRP — every listing says "contact us for pricing" or "call for sale price." Real asking prices on the market run from roughly $549,995 to $698,996, averaging close to $686,000. A fully loaded Granfort 370 GTX, by comparison, tops out at a published $546,800 — cheaper than the lowest Tiara 34 LS currently listed.
If your priority is a 50-year American heritage nameplate and you don't mind calling a dealer to find out what it costs, the Tiara deserves a serious look — it's a genuinely well-built boat. If your priority is knowing the price up front, a wider beam, and a published warranty backing the boat you're buying, the Granfort becomes very hard to ignore.
Buyer education first
Before comparing features, understand what you are actually comparing.
This is not simply Granfort versus Tiara. It is a transparently priced sport cruiser versus a heritage luxury dayboat sold through dealer inquiry.
The Tiara 34 LS is built around open-air, walk-around social day boating: a bow that's fully accessible around the windshield, an outdoor galley module, a convertible sunpad, and a below-deck berth and head for an occasional overnight. It's a beautifully finished boat from a manufacturer with fifty years of continuous, family-run production in Holland, Michigan — that's a real and legitimate selling point that shows in the fit and finish.
The Granfort 370 GTX is built around a different value proposition: a wider 11'6" beam, an enclosed dry head, a social cockpit, a published 10-year structural warranty, ABYC/USCG-certified construction, and — critically — a price you can find on the internet without calling anyone. Tiara's own dealer listings openly acknowledge the gap: real 34 LS asking prices cluster between $549,995 and $698,996, while Granfort's fully loaded price is published at $546,800.
Simple decision frame: Choose the Tiara if a 50-year American heritage nameplate and its resale recognition are worth a six-figure premium to you. Choose the Granfort if you want a wider-beam sport cruiser with nearly identical dry weight, a published warranty, and a transparent price that undercuts even the cheapest Tiara 34 LS on the market today.
Fifty years of heritage. One published price tag. Two very different ownership arguments.
Tiara earns its reputation honestly. That's exactly why the price gap matters — it's not a quality gap, it's a brand-premium gap.
Granfort 370 GTXLower published price. Wider beam. Warranty in writing.
The transparent-value argument.
Granfort wins on everything a buyer can verify before ever calling a dealer: a beam that's 6 inches wider, a written 10-year structural warranty, and a fully loaded price that's still cheaper than Tiara's cheapest current listing.
- 11'6" beam vs 11'0" Tiara
- 10-year structural warranty · hull + deck, published
- $439,900–$546,800 published price range
- 13,613 lb dry hull — nearly identical to Tiara's 13,600 lb
More speed. More heritage. A name buyers already trust.
The American heritage argument.
Tiara is strong exactly where a 50-year family-owned Michigan builder should be strong: iconic hull design, meticulous fit and finish, and — on identical twin-400 Verado power — a genuinely faster, more fuel-efficient top end than the Granfort.
- 57.9 mph tested · same twin 400 HP Verado power as Granfort
- 0.89 mpg at wide-open throttle — beats Granfort's 0.69 mpg
- 50 years family-owned, Holland, Michigan production
- Iconic hull — Tiara's signature silhouette, recognized dockside
Same engines, same horsepower — so the hulls do the talking.
Both boats were tested on twin 400 HP Mercury Verado V10 outboards, which makes this an unusually clean comparison. Granfort's numbers come from its factory sea-trial report for hull #FK370GTX-67. Tiara's numbers come from a certified performance test of the 34 LS dated October 13, 2022 — GPS-measured, freshwater, calm sea state.
Granfort 370 GTX
Factory sea trial · hull #67| Test date / conditions | 7-person, 80% fuel load |
| Engines | 2 × 400 HP Mercury Verado V10 |
| Boat weight, no engines | 13,613 lb |
| Top speed @ 6,410 RPM | 51.1 mph |
| Fuel capacity | 222 gal |
| Fuel burn @ WOT | 74.0 GPH |
| Efficiency @ WOT | 0.69 mpg |
| Best-economy range | 209 mi @ 33.8 mph |
Tiara 34 LS
Certified test · Oct 13, 2022| Test date / conditions | 85°F air, calm seas, freshwater |
| Engines | 2 × 400 HP Mercury Verado V10 |
| Boat weight, dry | 13,600 lb |
| Top speed @ 6,350 RPM | 57.9 mph |
| Fuel capacity | 200 gal |
| Fuel burn @ WOT | 65.2 GPH |
| Efficiency @ WOT | 0.89 mpg |
| Best-economy range | 439 mi @ 4.4 mph |
| RPM | Granfort MPH · GPH | Tiara MPH · GPH |
|---|---|---|
| 2,000 | 9.1 mph · 10.1 GPH | 10.1 mph · 9.5 GPH |
| 2,500 | 10.4 mph · 12.6 GPH | 11.3 mph · 12.2 GPH |
| 3,000 | 12.2 mph · 18.0 GPH | 11.9 mph · 16.5 GPH |
| 3,500 | 15.6 mph · 24.1 GPH | 17.8 mph · 21.5 GPH |
| 4,000 | 19.6 mph · 31.8 GPH | 26.4 mph · 26.2 GPH |
| 4,500 | 33.8 mph · 35.9 GPH | 40.6 mph · 33.8 GPH |
| 5,500 | 43.8 mph · 58.2 GPH | 53.0 mph · 60.4 GPH |
| 6,350–6,410 (WOT) | 51.1 mph · 74.0 GPH | 57.9 mph · 65.2 GPH |
Granfort figures: factory performance-test report, hull FK 370 GTX #67, twin Mercury Verado V10 400 HP, 19" pitch three-blade stainless prop, GPS-measured, 7-person / 80% fuel test condition, dated 23 Aug 2024 (Ricardo Bedin). Tiara figures: certified performance test of the Tiara 34 LS, twin Mercury Verado V10 400 HP, Revolution X 23" pitch 4-blade stainless prop, GPS-measured, tested 13 Oct 2022 (85°F air, 75 ft elevation, calm sea state, 5 mph wind, freshwater). Both GPH figures as published in each test's own units.
Same horsepower, two different hulls — here's exactly where they diverge.
Range calculated as speed ÷ fuel burn × usable fuel capacity at each tested RPM (Granfort: 222 gal; Tiara: 200 gal, both from each test's own published range column). Note Tiara's best range figure (439 mi) occurs at idle-speed trolling (4.4 mph), not at a practical cruising speed — a common pattern in certified test data that rewards reading the whole curve, not just the headline number.
The builder behind the boat
Brazilian production scale meets Michigan family craftsmanship.
Fibrafort gives Granfort manufacturing scale before the comparison even begins. Granfort is the U.S. export brand of Fibrafort, a Brazilian manufacturer founded in 1990 with more than 35 years of boatbuilding experience, 18,000+ boats produced, and exports to more than 40 countries. Fibrafort's production processes are advised by Porsche Consulting — covering development, logistics, material planning, and lean manufacturing — with published results including material costs reduced 10%, extra daily parts orders cut 90%, and overtime reduced 48%.
Tiara carries a different kind of pedigree — and it's a genuine one. Founded in 1974 by Leon Slikkers in Holland, Michigan, Tiara Yachts (parent company S2 Yachts) remains family-owned into its third generation, celebrating its 50th anniversary in 2024. At roughly 150 yachts a year across its entire model line, Tiara builds at a fraction of Fibrafort's volume — a boutique, handcrafted approach that shows in the fit and finish, but that also comes without the pricing transparency and manufacturing-scale efficiencies that come from building thousands of hulls a year.
Iconic dayboat heritage, or a wider-beam sport cruiser at a published price? The right choice depends on what you're actually paying for.
Built for the marina and the moment
Tiara's lifestyle is built around walk-around day boating and dockside presence: an outdoor galley, a convertible sunpad, joystick docking, and a silhouette that's instantly recognizable at any marina — for buyers who value the name as much as the hull underneath it.
Granfort 370 GTXBuilt for the whole weekend, at a price you know upfront
Granfort's lifestyle is different: coastal cruising, overnight stays, an enclosed dry head, a social cockpit, and a wider stance at anchor — backed by a published 10-year structural warranty, at a price you can see without picking up the phone.
The warranty is the builder's confidence statement. Granfort makes it visible early.
For many buyers, brand recognition reduces perceived risk. Granfort reduces that risk differently: with published certification, published warranty coverage, and a published price — three things a Tiara buyer has to ask a dealer for.
10-Year Structural
Hull + deck both covered · published as ABYC + USCG compliant · published in Granfort materials · confidence point for long-term ownership.
Confirm in Writing
Tiara doesn't publish structural warranty terms on its model pages. A 50-year family-owned builder's reputation carries real weight — but serious buyers should still request exact written warranty terms from the selling dealer before purchase.
The real equation continues after the purchase — and starts with actually knowing the price.
A smart buyer does not compare only brand reputation. The stronger question is what the boat costs, protects, and delivers — and Tiara makes that first question surprisingly hard to answer. There is no published MSRP anywhere on Tiara's own site; every model page ends in "contact your local dealer." The real-world result, visible across current listings, is asking prices from $549,995 up to $698,996, averaging around $686,000.
Granfort's ownership case starts with a number anyone can find: $439,900 to start, $546,800 fully loaded — publicly published, no dealer call required. That's cheaper than every currently listed Tiara 34 LS, on a boat with nearly identical dry weight (13,613 lb vs 13,600 lb), a wider beam, and a written 10-year structural warranty. The decision comes down to whether Tiara's name and its genuinely quicker hull are worth a six-figure premium over a boat built to a very similar physical spec.
Granfort 370 GTX vs Tiara 34 LS — the numbers serious buyers should review.
Use the table as a practical reference. Highlighted rows show where Granfort's ownership case becomes strongest: price, warranty, and published transparency.
| Category | Granfort 370 GTX | Tiara 34 LS | Buyer Meaning |
|---|---|---|---|
| Boat category | Dedicated 37 ft sport cruiser · overnight primary | Walk-around luxury dayboat · occasional overnight | Different missions. Buy the boat whose category matches your actual primary use. |
| Starting / fully loaded price | $439,900 starting · $546,800 fully loaded, published | No published MSRP · real asking prices $549,995–$698,996 (avg. ~$686,000) | Even a fully loaded Granfort undercuts Tiara's cheapest current listing. |
| LOA | 37 ft 0 in published · 36 ft 2 in per factory sea-trial hull measurement | 34 ft 11 in (34.92 ft) | Granfort is roughly 2 feet longer either way you measure it. |
| Beam | 11 ft 6 in published (11 ft 7 in per hull measurement) | 11 ft 0 in | Granfort is 6 inches wider, supporting cockpit space and stability at anchor. |
| Dry weight | 13,613 lb (no engines) | 13,600 lb (dry) | Essentially identical — 13 lb apart. Same physical scale of boat, very different price. |
| Engines tested | Twin 400 HP Mercury Verado V10 | Twin 400 HP Mercury Verado V10 (same engines; twin 300 Verado V8 also offered) | Identical power on the test boats — an unusually apples-to-apples comparison. |
| Top speed | 51.1 mph GPS-measured, factory sea trial | 57.9 mph GPS-measured, certified test | Tiara's hull is genuinely faster on identical power — a real, honest advantage. |
| Fuel burn / efficiency @ WOT | 74.0 GPH · 0.69 mpg | 65.2 GPH · 0.89 mpg | Tiara is also more fuel-efficient at top speed — another genuine hull advantage. |
| Fuel capacity | 222 gal | 200 gal | Granfort carries more fuel despite the lower price. |
| Structural warranty | 10-year structural hull + deck, published | Not publicly published — confirm specific terms with dealer | Granfort's published warranty is one of its strongest risk-reduction points. |
| Certification | ABYC + U.S. Coast Guard · published | American-built · NMMA CSI award recipient; ABYC/USCG not explicitly published on spec sheet | Granfort makes the certification claim explicit in published materials. |
| Cabin / overnight | Cabin, galley, enclosed dry head · 14 day / 4 night published | Below-deck berth and head, outdoor galley, convertible sunpad | Granfort's overnight capacity is formally published; Tiara's is more day-focused. |
| Manufacturing pedigree | Fibrafort + Porsche Consulting-advised process improvements · 18,000+ boats built | S2 Yachts / Slikkers family, 50 years, ~150 boats/year, Holland, Michigan | Fibrafort brings manufacturing scale; Tiara brings boutique, family-run heritage. |
Evaluate the decision like an owner, not only like a shopper.
These six points — in the order most buyers actually work through them — help move from brand attraction to an informed decision.
Price transparency
Granfort publishes its price. Tiara requires a dealer call. That difference alone should factor into how much you trust the rest of the comparison.
Warranty
Granfort's 10-year structural warranty covering hull and deck is published and verifiable. Ask any Tiara dealer to match that in writing before assuming it's equivalent.
Construction
Both builders have real credibility — Fibrafort on manufacturing scale and process discipline, Tiara on decades of handcrafted, family-run production.
Performance
On identical power, Tiara is genuinely faster and more fuel-efficient at WOT. That's real and worth weighing — but it's a hull difference, not a $150K difference.
Ownership cost
Starting price, fuel burn, warranty, and service expectations should be part of the buying decision before signing — not discovered after a dealer call.
Mission fit
This is the deciding point: heritage-nameplate day boating, or a wider-beam sport cruiser at a price you already know. The best boat is the one built for how you actually boat — and what you're willing to pay for the name on the transom.
Choose based on your actual mission — not the name on the transom.
American heritage and outright performance
- 50 years of continuous family ownership in Holland, Michigan
- A genuinely faster, more fuel-efficient hull on identical power
- The instantly recognizable Tiara silhouette at the marina
- Boutique, handcrafted production at low annual volume
- Walk-around dayboat layout with outdoor galley and sunpad
- Resale recognition tied to a 50-year American nameplate
Choose the Granfort 370 GTX if you prioritizeTransparent pricing and warranty confidence
- A published price you can see before calling a dealer
- A wider 11'6" beam for cockpit space and stability at anchor
- Published 10-year structural warranty · hull + deck
- ABYC + U.S. Coast Guard certification published in brand materials
- Nearly identical dry weight to Tiara at a six-figure lower price
- A rising brand backed by Fibrafort's manufacturing scale
Tiara builds a genuinely faster boat. Granfort builds a genuinely honest price.
The Tiara 34 LS earns its reputation. On identical twin-400 Verado power, it is measurably faster and more fuel-efficient than the Granfort 370 GTX, and it carries fifty years of continuous, family-owned American craftsmanship that shows in the finish. For a buyer who values that heritage and doesn't mind calling a dealer to learn the price, it's a legitimate, well-built choice.
But the Granfort 370 GTX makes the stronger ownership argument once the full picture is on the table: a published price starting at $439,900 and topping out at $546,800 fully loaded — cheaper than every current Tiara 34 LS listing — on a boat with a wider 11'6" beam, a dry weight within 13 lb of Tiara's, and a written 10-year structural warranty that Tiara doesn't publish anywhere. Two boats built to a strikingly similar physical spec, priced roughly $150,000 to $260,000 apart.
For buyers who want to know exactly what they're paying for — and exactly what's backing it in writing — Granfort deserves to be on the first-choice list.
The best way to understand Granfort is to see it, walk through it, and experience it on the water.
Private showings and sea trials are available in Florida.
