Joining the existing Q7 TDI, which gets an update, Audi will introduce diesel versions of the A8, A7, A6 and Q5.
The company claims each model will deliver up to 30 percent better gas mileage and 30 percent lower CO2 emissions than the gasoline equivalent, while the new 3.0-liter clean-diesel engine produces 240 horsepower and 406 lbs-ft of torque.
2014 Audi A8 TDI
Audi's flagship A8 range will be the first to get the new TDI unit, in Spring 2013. The aluminum-bodied executive sedan is expected to achieve 24 mpg city and 36 mpg highway in EPA testing.
That's a significant improvement on the existing, V-8 engined A8, which manages only 18 mpg city and 28 highway. The diesel model is still quick, too--60 mph comes up in only 6.4 seconds.
2014 Audi A7, A6, Q5 TDI
The next three diesel models will arrive in the fall of 2013, and all utilize the same 3.0-liter engine as the larger A8 sedan. All should feature best-yet fuel efficiency, without compromising on Audi's core values of performance, quality and technology.
2013 Audi Q7 TDI
The Q7 TDI has been available in the U.S. for a while now, and the new 3.0-liter TDI joined the range in September. Prices start from $52,000.
Efficiency has been improved, from the 2012 car's 17 mpg city and 25 mpg highway, to an estimated 19 city, 28 highway. Based on the highway mileage, Audi says the 2013 Q7 TDI can go over 700 miles on a fill of its 26.4-gallon tank.
All the Audi TDI models will be on display at the L.A. Auto Show later this month.
If you'd like to keep up with the TDI models on Twitter, Audi is using the hashtag #FuelForThought throughout the show. Alternatively, you can keep up to date with our own show coverage on our L.A. Auto Show page.