Top 5 Most Expensive Car In The World 1. Rolls Royce Boat Tail It is the world's most expensive street legal new car at $28 million. 2. Bugatti Lovewater or Nori This all-black Atlantic is priced at $18.7 million. 3. Bugatti Chinto Dièchi This limited-adition luxury high-performance comes in at a cool $9 million.