Someone had the bright idea of converting a Lamborghini Diablo into a convertible model, this was however never a factory built Roadster. The looks of this specific car were much like the Diablo SE 30 Anniversary edition, but with five-spoke multi-piece wheels mounted with 18 inch tires. The interior was a leather upholstered one with standard seats.
It is very unlikely this was a real Lamborghini, I personally think it was just a replica, modified into a roadster after a roll-over accident, just like the Countach Roadster featured on this site.
If it was actually a real Lamborghini built Diablo SE30, it was a very bad idea to convert it into an open-top car, the SE30 was only built at 150 units, with only 25 for the United States, so I can't imagine this conversion will force the price up, just like with the Miura, some cars were converted into roadsters but they never did get accepted by the true Lamborghini lovers.
A visitor to this site has mailed me the origins of this special Diablo, actually it started life as a normal Diablo VT, Platinum Motors have built this 'special' from it, probably to be able to sell it at a higher price than normal, according to this mail they are also responsible for the Twin Turbo versions of the Diablo, I suppose this is the Diablo VTTT found on a different page.
Official press release from Automobili Lamborghini SpA on the limited edition Murciélago LP640 Roadster Versace
(added on November 10. 2013)
The Lamborghini Veneno Roadster comes with high performance audio by Monster celebrating one of the most dramatic cars of this generation...
(added on January 8. 2014)
We already know the Versace model in coupé form, but now it's also available as a Roadster.
(added on June 23. 2008)
A rear wheel drive only version of the Diablo Roadster ...
(added on April 30. 2005)
How about a full bodykit along the lines of the extremely rare Lamborghini Veneno ... installed on an Aventador Roadster
(added on July 25. 2013)