Sixteen seconds. That’s how long a stock diesel 80-Series Toyota Land Cruiser needs to reach 60 mph, a number that makes a loaded delivery van look eager.
One builder cut that to 8.8 seconds. He did it by pulling an engine out of a boat and bolting it into a truck that already shared its bloodline.
The work comes from the guy behind the Rare Vehicles in Action YouTube channel. His donor is a Yanmar 6LP, a marine turbodiesel from the Japanese company better known for tractors, diggers and industrial diesels.
Here’s the catch: the 6LP has been in this chassis before, in a sense. It’s essentially a marine version of Toyota’s 1HD-FT, the 4.2-liter turbodiesel inline-six that the 80-Series briefly offered from the factory.
So this is less a swap than a homecoming. The engine went to sea, picked up a few habits, and came back stronger.
This truck left the factory with its own 4.2-liter turbodiesel six, but that one ran 12 valves. The Yanmar runs 24.
The result is 320 horsepower, roughly double the stock 12-valve output. The builder says it makes that while still breathing through the factory air intake, a part known to choke these engines.
That means there’s more left on the table. He hasn’t said how much a freer intake would add, and we won’t guess for him.
Shared DNA didn’t mean plug and play. The marine engine came with hardware that makes sense on a hull and none in a desert.
The seawater pump came off, and a stock Toyota cooling system went in. The Yanmar oil sump and pickup were swapped for Toyota parts to clear the chassis.
The injector pump got the same treatment, because the marine unit has no threaded boss to drive a tachometer. It’s fiddly stuff, but it’s what separates a running engine from a truck you can actually drive.
Power goes through a Toyota H152 gearbox, a taller-geared version of the five-speed manual the truck had from new. At 60 mph, the engine turns just 1,600 rpm.
That number tells you what this build is about. It isn’t chasing quarter-mile times. It’s chasing a diesel that loafs on the highway and still pulls hard when you ask.
The rest of the truck got the attention any 30-year-old off-roader needs. The front axle was rebuilt, rust and electrical gremlins were sorted, and a new exhaust went on.
The Land Cruiser reportedly covered 200,000 miles with its first owner. Nothing about this build suggests it’s done traveling.
Engine swaps for fast cars usually pull from other cars. Builders of work trucks and trail rigs have a wider menu, including stout diesels from construction gear and boats that fit under a pickup or SUV hood.
The traffic runs both ways. Car engines have long been marinized for boats, and even Lamborghini once went down that road.
This build just reverses the current. Toyota designed the engine for this truck, Yanmar adapted it for the water, and a YouTuber in a garage brought it back to dry land with twice the punch.
The stock intake is still in place. So is the question of how much more this old Toyota has in it.
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