World’s Most Expensive Cars: 1. Bugatti Veyron Super Sports $2,400,000. This is by far the most expensive street legal production car available on the market today (the base Veyron costs $1,700,000). Capable of reaching 0-60 mph in 2.5 seconds, the Veyron is the fastest street legal car when tested again on July 10, 2010 with the 2010 Super Sport Version reaching a top speed of 267 mph. When competing against a Bugatti Veyron, you better be prepared!