Audi India is planning to introduce a more powerful diesel engine in the A4 to compete with the BMW 320D. The engine Audi is planning to launch in the A4 is the 170bhp 2.0 litre diesel. The current 140bhp diesel in the A4 is quite down on power infront of the Bimmer. However, Audi is concerned about the diesel particulate filter (DPF), which is better suited for Bharat Stage IV fuel but that will be available only in 2010 and only in the metros.