Forbes’ Top 10 Most Expensive Cars of 2012 Published on September 17, 2012 in Top 10 by Gilles Olivier Photo: Bugatti 1 - Bugatti Veyron Super Sport ($2.6 million). For the second consecutive year, this is the world’s most expensive car. It’s the only vehicle to come equipped with a 1,200-horsepower W16 engine. It can reach 100 km/h in 2.4 seconds.