14/10/2025
The £8,500 Question: How Far Do You Really Want To Ride?
Introducing the Gran Turismo GT300LC: The Water-Cooled Engine Built for the Long Haul
In the world of classic scooter tuning, the pursuit of peak horsepower is an obsession. But for the serious rider—the one who clocks 1,000 miles on a summer trip, not just three laps on a track—raw numbers mean nothing without reliability.
This is why we built the Gran Turismo GT300LC. It’s not simply the fastest engine on the market; it is, without a doubt, the most thermally stable, long-distance capable engine conversion ever produced for a classic Lambretta.
The Problem Solved: Heat and Heartbreak
Every experienced scooterist knows the feeling: high-speed cruising on a hot day. The power feels
great, but in the back of your mind, the ticking clock of an overheating cylinder head is counting down to a potential seizure.
Our competitors boast about air-cooled engines that hit 35hp—but what is the true cost of that
power when the cylinder head temperatures (CHT) are soaring, stretching the limits of the piston, and leading to inevitable failure?
The GT300LC eliminates this dilemma entirely.
Engineering Authority: Why Water is the Answer
The GT300LC is an engineering solution to an age-old problem. It is built around a bespoke CNC-machined Granturismo casing designed from
the ground up to incorporate a modern, liquid-cooled Rotax cylinder.
Thermal Stability: The liquid-cooled design maintains the engine block at an optimal, consistent temperature, regardless of the ambient heat or sustained running speed. Your air-cooled rivals will see CHTs jump to 200^C or more on a motorway climb; the GT300LC cruises with total thermal stability.
Reduced Wear: Consistent temperature means piston and bore clearances remain constant. This drastically reduces wear, friction, and the risk of heat-related failure. It’s the reason modern high-performance engines use water, and now, so can your Lambretta.
Smooth Power, Endless Miles: The engine delivers a broad, smooth wave of touring torque that translates into effortless, all-day 80 mph cruising capability. It's fast, but more importantly, it's undemanding.
The GT300LC 10,000-Mile Challenge
We don't need biased magazine reviews to prove our point. We rely on irrefutable evidence.
We are now documenting the journey of the first owners to hit 10,000 genuine road miles on their GT300LC. What we find during the strip-down inspections are piston bores in factory-fresh condition, bearing surfaces showing minimal wear, and cranks still perfectly true.
The GT300LC is the engine that keeps the promise of performance.
Stop worrying about CHT, EGT, and roadside repairs. Invest in the engine that gives you the only thing that truly matters on a long trip: confidence.
GRAN TURISMO GT300LC
The Last Engine You'll Ever Build. The First Engine
You'll Tour The Continent On.
Find the full technical report and owner testimonials at: https://lambretta-images.com/gt300l/
YouTube Playlist at:
https://youtube.com/playlist?list=PLIecpg2vKNrWBQSYHfkR6ddl0U5z0RwFY&si=P_XWa3EZS_Cx5Ze3
300cc Liquid Cooled Development and Testing. GT300LC. Granturismo have been developing a truly game changing engine for the Lambretta motor scooter since its first conception in 2015. The GT interc…
