Forbes’ Top 10 Most Expensive Cars of 2012 Published on September 17, 2012 in Top 10 by Gilles Olivier Photo: Hennessey Performance 8 - Hennessey Venom GT ($1 million). Built on the Lotus Exige’s base, this ultra-high performance car is equipped with a 6.2-litre V8. The engine’s 1,200 horses can charge to 100 km/h in 2.5 seconds.