Most Valuable New Car Ever Sold? Is this the ultimate one-off? Is this the last W16? Check, Check, and Check. Need we say more? Bugatti’s Chiron-based one-off Profilée may be Bugatti’s final pure internal combustion engine vehicle, and it’s almost certainly their last vehicle fitted with their legendary 1500 horsepower quad-turbo 8.0 liter W16 engine. It’s also the most valuable new car ever to be auctioned with a final bid of over $10.6m (including buyer’s premium).