If you grew up loving cars in the 1990s, there’s a strong chance you had a poster of this Lamborghini on your wall, and maybe a diecast scale model on your bookcase. It was arguably the ultimate manifestation of the supercar in its time, with radical styling and extreme performance. But even among Diablos, not all were equal.

Though not the last version, the Diablo GT was arguably the ultimate expression of the breed. And this flawless example can be yours if you place the right bid at RM Sotheby’s upcoming auction in London on September 7.

Where modern Lambos typically pack all-wheel drive and paddle-shifted transmissions to make them easier to control, the Diablo GT was stuck with rear-drive and an old-school five-speed manual. And where most Diablos packed a 5.7-liter V12, the GT’s was bored out to 6.0 liters even. With the help of other enhancements – including intake manifold and cylinder heads made of magnesium and connecting rods from titanium – the enlarged engine produced 575 horsepower and 465 lb-ft of torque.

The Diablo GT also featured enhanced bodywork, with an overhead air snorkel, more vents, a wider stance, and a giant carbon-fiber rear spoiler. The sum total of all those upgrades was a 0-60 time of just 3.5 seconds and a top speed of 211 miles per hour, taking the Diablo – which was first Lambo to crack the 200-mph barrier – even further.

Only 80 examples were made, all sold in Europe in one of just four colors: black, grey, orange, or yellow. This example was the sixth made, outfitted (as you can see) in grey with a two-tone black and blue interior. It was delivered to a customer in Monaco through a dealership in Milan, and has been well looked-after over the course of its 17 years of use. Its solitary owner has put 11,100 kilometers on the odometer since taking delivery, but is now putting it up for auction. Estimates place its value at around £400,000 (~$525k). Check it out in the gallery below, captured by Dirk de Jager for RM Sotheby’s.

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