This 900hp 2JZ-GTE Phantom is a playboy's dream!

It's official: Japan has gone insane!

Really? There are only so many types of car you can do an engine swap on, but a two-and-a-half tonne Roller? Madness.

With work done by J and K Products, this Japanese Phantom now cranks out an astonishing 671kW (900hp) thanks to the world's most determined 2JZ-GTE.

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At this point I'm surprised it doesn't have a flame paint job and nitrous. (image credit: @Beahnyyy/Twitter.com)

Spotted in Tokyo by @Beahnyyy and LSB on Twitter, the new 2JZ replaces the buttery smooth 338kW (460hp) 6.75 V12 that was installed back at the Goodwood plant, and currently features forged internals from HKS, a massive GReddy T78-33D turbo, and a HKS GTS8555 (centrifugal) supercharger nestled deep inside the engine bay.

The shifter now sits on the floor, instead of resting up on the steering wheel. (image credit: LSB/Twitter.com)

The original transmission, designed to deliver purely imperceptible shifts, has been replaced with a much beefier unit. Truth be told however, it's actually from a Lexus GS. Don't ask...

The more gauges (and anime pin-ups) you have, the faster you go. Simple as that. (image credit: engineswapdepot.com)

The mods come as a result of a coolant leak that caused the original engine to cook itself. So while it may irritate hardcore Rolls-Royce fans that an archetypally opulent Phantom has been 'besmirched' in such a way, its modified state only comes as a result of its apparent lack of build quality. Boom.

What do you think of the 2JZ powered Phantom? Is it a waste of engine, or a waste of car? Tell us what you think in the comments below.