Forbes’ Top 10 Most Expensive Cars of 2012 Published on September 17, 2012 in Top 10 by Gilles Olivier Photo: Aston Martin 5 - Aston Martin One-77 ($1.4 million). With just 77 units made, this is the brand’s most expensive model – and the most powerful Aston Martin ever. Its 7.3-litre V6 produces 750 horsepower and can run from 0 to 100 km/h in 3.7 seconds.