GranFort 300 GTX : The Ultimate High-Performance Luxury Sport
GRANFORT 300 GTX 📞 +1 (800) GRANFORT Book Sea Trial Granfort 300 GTX · Twin Outboard · 2026 300 GTX Twin Mercruiser V8 4.5L · 2×300HP = 600HP total · 30 ft Outboard Sport Cruiser · 50 mph GPS-confirmed 50mphTop speed · GPS · 2 persons 600hpTwin Mercruiser V8 outboards 5.9sec0 to plane · 2 persons 228miBest range autonomy Scroll 50mphGPS · factory test · 2 persons 600hpTwin Mercruiser V8 4.5L outboard 5.9sec0 to plane · lightest load 228miBest range at 3,500 RPM cruise 12+4Day passengers · overnight berths The 300 GTX — correctly understood Twin outboards. 600 HP. A different power entirely. The Granfort 300 GTX is powered by two Mercruiser Fourstroke V-8 4.5L 300HP outboard engines — 600 HP total. This is a fundamentally different boat from the 300 GTS, which uses a single inboard engine. The twin outboard configuration gives the GTX immediate, responsive power delivery, effortless joystick docking capability, and the confidence of redundant propulsion on the water. At 9.10m LOA on a 2.80m beam, the 300 GTX produces a GPS-confirmed 49.9 mph top speed with 2 persons and — remarkably — 49.7 mph with 11 persons aboard. The hull barely notices the load. This is the factory test data: real numbers, named source, GPS-confirmed. Starting at $234,700 with twin 200HP, or $265,500 fully configured with twin 300HP — the 300 GTX is the entry point to the Granfort twin outboard experience. The ownership experience Interactive cockpit. Open bow. Gourmet stern. The 300 GTX was designed for buyers who want the full social boat experience — a cockpit bar with cooler, fridge and sink, a lowered open bow with ample handrails, and a stern gourmet area complete with grill, table, sink and cup holders. Interactive cockpitSide chaise · centre table · cockpit bar with cooler, fridge, sink Open, lowered bowSound console · ample handrails · safety-first design Stern gourmet platformGrill · table · sink · speakers · cup holders 50 49.9 mph top speed — 2 persons, GPS measured at 6,000 RPM The 300 GTX reaches 49.9 mph with 2 persons aboard at 50% fuel. The most remarkable figure: with 11 persons the boat still reaches 49.7 mph — just 0.2 mph slower. This hull is so efficient at managing load that additional passengers barely register in the performance numbers. Source: Fibrafort factory test FK 300 GT #007. Factory test · GPS · 2 persons 5.9 5.91 seconds to plane — 2 persons. 8.04 seconds — 11 persons. From rest to fully on plane in under 6 seconds with 2 people aboard. Even with 11 persons the hull planes in just over 8 seconds. Minimum planing speed: 26.0 mph (2p) and 27.5 mph (11p). The twin 300HP outboards deliver instant, linear thrust from idle — the transition onto plane is immediate and controlled. Published factory test 600 600 HP total — 2× Mercruiser Fourstroke V-8 4.5L 300HP outboards 224 kW per engine. V-8 4.5L displacement. Maximum RPM 5,200–6,000. P17/DIAM16 INERTIA three-blade stainless steel propellers. Twin outboard configuration gives full joystick docking capability and the reassurance of redundant propulsion at sea. Engine options available from 200HP per engine up to 300HP per engine (600HP total). Twin Mercruiser V8 4.5L · Outboard 228 228 nautical miles best range autonomy — 3,500 RPM cruise At 3,500 RPM (24.0 knots / 27.6 mph), the 300 GTX burns 63.1 L/h (~16.7 GPH combined across both engines) giving 228 nautical miles of range on the 520L (137 gal) tank. This is the best range point on the consumption curve — the most efficient cruise speed for distance. Range holds above 199 miles all the way to 4,500 RPM. 520L tank · 100% capacity 7.5 7.53 seconds — 0 to 30 mph with 2 persons From standstill to 30 mph in 7.53 seconds with 2 persons aboard. With 11 persons that rises to 9.02 seconds — still under 10 seconds for a fully loaded 11-person boat. For comparison, the 300 GTS single inboard reaches 30 mph in 18.67 seconds. The twin outboard configuration delivers nearly 2.5× better acceleration. 0 to 30 mph · 2 persons · GPS Published fuel and autonomy data Real consumption numbers. Factory test. Named source. All data from Fibrafort’s published performance test FK 300 GT #007, conducted on Rio Itajaí-açu, Itajaí/SC, Brazil. Fuel consumption via engine instruments. Autonomy at 100% tank (520L). Combined consumption shown for both engines. 2-person test unless noted. RPM Speed (knots) Speed (mph) Combined (L/h) Combined (GPH) Miles / Litre Autonomy (miles) Best use 3,000 11.9 13.7 50.9 L/h 13.4 GPH 0.27 139 mi Economy harbour cruise 3,500 24.0 27.6 63.1 L/h 16.7 GPH 0.44 228 mi ⭐ Best range point 4,000 28.5 32.8 77.1 L/h 20.4 GPH 0.42 221 mi Performance cruise (planing) 4,500 32.8 37.8 98.8 L/h 26.1 GPH 0.38 199 mi Sport cruise 6,000 43.3 49.9 ~195 L/h ~51.5 GPH 0.22 ~108 mi Top speed run Source: Fibrafort Performance Test FK 300 GT #007 — 2× Mercruiser Fourstroke V-8 4.5L 300HP · P17/DIAM16 INERTIA propellers · 2 persons · 50% fuel · 100% water · Rio Itajaí-açu, Itajaí/SC. Speed by GPS. Autonomy based on 100% tank capacity (520L / 137 gal). GPH converted from L/h (÷ 3.785). Combined figures shown for both engines. What the data tells you: The 300 GTX sweet spot is 3,500 RPM — 27.6 mph comfortably on plane at 16.7 GPH combined, giving 228 miles of range. Cruise at 4,000 RPM (32.8 mph, 20.4 GPH) and you still get 221 miles. Even at 4,500 RPM (37.8 mph) range stays above 199 miles. At full power you reach 49.9 mph burning approximately 51.5 GPH combined — reserve that for the runs that deserve it. Gallery The 300 GTX — every angle. See every detail Designed for the water. Built to last. Cockpit Bow deck Stern platform Cabin Complete specifications — published factory data Every number. Named source. All specifications from Fibrafort’s published performance test FK 300 GT #007 and the Granfort 300 GTX product page. Hull & Dimensions

