Audi is to add four new diesel models in its North American range as the firm continues to push sales of oil-burners in the US. 

Diesel versions of the A6, A7, A8 and Q5 have been launched at the Los Angeles motor show and will all get variations on the 3.0-litre V6 diesel, branded in the US as CleanDiesel.

In the A8, the only car that Audi has released specifications for, the engine develops 240hp and 406lb ft. 

The addition of the four new models increases Audi’s diesel range in the States to six – the A3 is available with a 2.0-litre TDI, and the Q7 has used the 3.0-litre V6 since September – giving it more diesels than rivals BMW and Mercedes. 

Dan Stevens