Few supercars of the 1990s still look as dramatic as the Lamborghini Diablo, and few come with a story as tidy as this one. Broad Arrow Auctions will offer a 1998 Lamborghini Diablo VT Roadster at The Zürich Auction 2026, a car delivered new in Switzerland, owned by one person from day one and showing just 13,914 km (about 8,650 miles) at the time of cataloging. The pre-sale estimate is CHF 620,000 to CHF 680,000, which works out to roughly $746,000 to $819,000.Photo: Broad Arrow AuctionsA Titanium Roadster With a Single ChapterThe car was delivered new through Garage Affolter and has never left the hands of its first owner. It is finished in Titanium over a red leather interior, a color pairing that suits the Diablo's wedge profile far better than the loud paint schemes the model is often remembered for. According to the catalog, the roadster has been serviced and maintained throughout its life by the original dealer, and it comes with its factory documentation, including the stamped service book in its original leather pouch.That paper trail matters. Hagerty's own valuation notes on the Diablo advise buyers to shop the owner as much as the car and to favor examples with the most documentation, because supercars of this era have often lived harder lives than their odometers suggest. A one-dealer, one-owner history is about as clean as it gets.What the VT Roadster Brought to the DiabloThe Diablo VT arrived in the mid-1990s with a viscous-coupling all-wheel-drive system that could send up to 20 percent of the engine's torque to the front wheels, along with power steering, bigger brakes and a revised interior. The roadster followed in the 1995 model year, trading the fixed roof for a removable carbon-fiber panel that stores over the engine cover. Power came from Lamborghini's 5.7-liter V12, rated at roughly 485 to 492 horsepower depending on the market and year. Audi took over Lamborghini in 1998, which makes this car one of the early Diablos built under German ownership.Open-top Diablos have always been a smaller slice of the production run than the coupes, and that scarcity is part of why they draw attention when they cross the block. We have followed several of them recently, including a 1998 Diablo VT with a Hollywood connection and a 2001 Diablo VT 6.0 that also crossed the Broad Arrow block.Where the Diablo Market StandsThe estimate looks bold next to the baseline numbers, but the baseline is moving fast. Hagerty's Valuation Tools put a #3 (Good) condition 1990-2001 Diablo at roughly $317,000 as of October 2026, with the guide up about 14.9 percent over the past quarter, 20.5 percent over the past year and 66 percent over three years. Hagerty's market data also shows 36 Diablos sold at auction over the last 12 months for $20.3 million in total, an average of about $565,000 per car, with sales volume up 80 percent.The average is the number to watch. It sits well above the #3 value because the cars that sell publicly tend to be the best ones: low mileage, original, well documented. Recent results back that up. Hagerty lists a 2000 Diablo VT 6.0 Coupe that sold for $507,000 at Collecting Cars on September 28, and a 1997 Diablo that brought $555,000 from Broad Arrow in August. A Diablo with fewer than 14,000 km, a single owner and a service book from the dealer that sold it is exactly the profile that pulls prices toward the top of the range. Collectors who want to see how the rarest versions are being treated can read about the first-ever 1998 Diablo SV Monterey Edition or a 7,000-kilometer 1991 car.Hagerty's guide figures are general Diablo values rather than a roadster-specific appraisal, so a car like this one will always be judged on condition, mileage and provenance first. Anyone planning to bid can run the numbers themselves in the Hagerty Valuation Tools before auction day.Why This One Stands OutLow-mileage Diablos are no longer a secret, but a roadster that has spent its whole life in one family's care, serviced by the dealer that delivered it, is still uncommon. Add the subdued Titanium paint, the red leather and the original leather pouch holding the stamped service book, and this is a Diablo that looks more like a time capsule than a project. Whether it lands inside the estimate or beyond it, it will be a useful read on how the market treats the open-top VT in a year when Diablo values keep climbing. For more Lamborghinis worth watching, see our roundup of the coolest Lamborghinis for sale right now.Chassis No. ZA9RE37A0VLA12736. More details, photos and bidding information are available from Broad Arrow Auctions.⚡️ Read the full article on Motorious