Net profit for the luxury car unit at Volkswagen leapt to €2.63 billion, up from €1.35 billion in 2009, on sales that gained 18.8 percent to €35.4 billion, a statement said.
The company's operating profit was more than double the 2009 level at €3.34 billion, it added, while unit sales were 15 percent higher at 1.09 million vehicles.
Audi was progressing in several regions around the world, and not only in China where sales jumped by 43.4 percent to 227,938 vehicles, the company said.
German sales were essentially stable at 229,157 automobiles, while deliveries in the United States grew by a faster pace than the market in general to 82,716.
A slowdown was noted however at Lamborghini, the very expensive sports car VW has placed within the Audi division, which saw sales fall by 15 percent to 1,302 vehicles last year.
Heading into 2011, the group "is on its way to achieving the most successful first quarter in its history in terms of sales," marketing director Peter Schwarzenbauer said.
"The continued growth in the United States is based on a solid foundation - and shows that we are strengthening our position in the premium market," he added.
Audi has set a sales target of 1.2 million cars for 2011.