World's most expensive model car made of gold on sale for $15m The model car is expected to sell for $15 million at auction. The prototype is currently on display in Dubai at the Lamborghini showroom. The finished version will have diamond headlights and precious gems at the rear and on the wheels. It will have 700 jewels in each seat, in a nod to its inspiration, the Aventador LP 700-4. Buyers of the model will have the option of purchasing the real car in an exclusive colour - Emirates Gold. WHAT do you buy for the billionaire motor enthusiast who already has a garage full of top sportscars? There's always a Lamborghini carved out of solid gold - although unfortunately, they won't be able to drive it. German engineer Robert Wilhelm Gülpen has designed the most expensive model car in history, which is expected to sell for $15 million at auction. The precious motor, a replica of Lamborghini's Aventador LP 700-4, is carved from a 500g block of solid gold, with high-quality diamonds for the headlights and coloured gems for the lights at the rear. The car's body features genuine carbon fibre, as used in Formula 1 vehicles, with 700 jewels on each seat in a nod to its namesake, the Aventador LP 700-4. GALLERY: Frankfurt Auto Show LEXUS: Bucking the turbo trend Gülpen's firm, Robert Gülpen Engineering, has been building collectable model cars from gold, silver and platinum for 12 years. He says his replicas cover the range of all leading vehicle manufacturers and have proved a hit with those with a taste for luxury and a passion for cars. "Quality of craftsmanship, precision, individuality and value are the trademarks of the German model carmaker," he says. He now hopes to enter the Guinness Book of Records for creating most extravagant model motor of all time, describing the design as "uncompromising, extreme and sensuous." He is aiming for three world records - most expensive model, most secure display case (it is made of bulletproof glass), and the most expensive Lamborghini logo. The prototype, built at a scale of 1:8, is currently on display in Lamborghini's Dubai and Abu Dhabi showrooms, and will then appear at the Dubai International Motor Show before touring the world. Anyone who decides to buy the finished version before it goes to auction will be able to pay a slightly less wallet-bruising $7.9 million, and will be able to specify the model's finishings. The buyer will also have the opportunity to purchase a real Lamborghini Aventador along with the model in a world-exclusive shade - Emirates Gold. This package will cost $8.6 million.