The Audi R18 e-tron quattro (2014) is a continuation of the 2013 model year. Changes included a revised 4.0L Turbo TDI V6 engine and a new seven-speed sequential manual gearbox. Its predecessor is the Audi R18 TDI. The Audi R18 e-tron quattro was again altered for the 2015 season. This car won the 2014 24 Hours of Le Mans and the 2014 6 Hours of Circuit of the Americas.