The introduction of two-litre turbo engines for the DTM is reported to have been delayed by one year, from the original plan of 2016 to 2017.

“We will have four-cylinder engines by 2017. The change was planned for 2016, but the deadline has passed,” said Dieter Gass, Audi DTM head, to Motorsport-Total.

The announcement of the planned change of engine regulations for DTM came last year as a part of the plan to share regulations with the Japanese Super GT series as well as the planned American version of DTM.

Super GT is already racing with turbocharged four-cylinder engines and has Honda, Lexus and Nissan taking part in the championship. The principal behind the shared regulations is to allow the Super GT manufacturers to be able to race in Europe and USA, as well as for the current DTM manufacturers Audi, BMW and Mercedes to race in Asia and the USA.