The electric-vehicle maker, led by billionaire Elon Musk, plans to start deliveries of the Model X sport-utility vehicle in 2015.
The brand had the top score in this year's Consumer Reports owner-satisfaction survey. Audi ranked third after Porsche, while Mercedes-Benz was fourth.
Audi, the world's second-largest maker of luxury vehicles, expects to sell more than 1.7 million cars this year for the first time. The Volkswagen unit aims to surpass No. 1 BMW in sales by the end of the decade and expanding in the US is a key part of that.
Watch: Tesla unveils new self-driving car
Deliveries to American buyers have climbed 15 per cent so far in 2014 and have already beat the record of 158,061 cars sold last year. Audi is targeting further expansion as it seeks to catch up to BMW and Mercedes in the country.
"Our growth in the US is bound to continue," said Stadler. "We're setting our sights on the 200,000 mark and once we've reached that we'll look at the 300,000 mark at some point, whether we get there in 2020, 2022 or 2023, I don't really mind."
Cleaner running cars are important to Audi's strategy as fuel efficiency has become a sign of cutting-edge technology. That image is critical for luxury brands to justify higher prices than mass-market competitors, even if demand for electric cars are tepid. After starting deliveries of the 37,900-euro ($46,700) A3 E-Tron earlier this year, Audi will add one new plug-in hybrid vehicle every year.
The new crossover - a body style that typically combines elements of cars and SUVs - marks a change of tack by Audi, which had balked at introducing dedicated electric vehicles unlike BMW, which makes the battery-powerd i3 city car. Audi instead focused largely on developing electric versions of existing models to keep a lid on costs.
The Ingolstadt, Germany-based Volkswagen unit is spending 22 billion euros by 2018 on expanding manufacturing capacity and developing new vehicles. It plans to expand its lineup to more than 60 vehicles from about 50 now.
- Bloomberg