Getting more from less. Audi pioneered TDI® clean diesel engines to deliver more torque, lower fuel consumption and reduce CO2 emissions, compared to equivalent gasoline engines. The result of this revolutionary engineering delivers remarkable performance, while achieving increased fuel economy.


Fuel for thoughtUnleashing the power of diesel.

We thought you should know: Diesel sports a greater power density than traditional gasoline, which means that a gallon of diesel fuel has about 15% more energy than a comparable amount of gas, and combusts more efficiently in the engine.

The science behind the intelligent choiceThe art of refinement.

Given the understanding that a drop of diesel has more inherent energy than the same amount of gasoline, but they start as the exact same thing: crude oil. Take a visual look at how TDI® clean diesel is smarter.

Diesel yields more energySimply boil to unleash.

When petroleum is boiled at precise temperatures, one gallon of diesel yields a much greater power density than gasoline.

Making diesel cleanerChemistry behind losing sulfur.

During the refinement process sulfur molecules bind to hydrogen, helping separate the pollutant from fuel. Today's diesel fuel has 97% less sulfur than in years past.

Variable vane turbochargerThe right boost for reaching the ideal speed.

Audi adjustable vane turbochargers smoothly produce immediate torque, help create impressive mid-range passing speeds and reduce fuel consumption at high speeds.

Piezo direct injectionBetter injection through precise pressure.

Precise injections help lower the combustion noise normally associated with diesel engines, while optimizing the distribution of fuel in the combustion chamber, helping to further reduce exhaust emissions.

Combustion is keyBetter compression. Better emissions.

Combining a high compression ratio with direct injection makes combustion more efficient, and produces emissions cleaner than those of engines with a lower compression ratio.

After-exhaust treatmentThis barrier is a good one.

With innovative diesel particulate filters and the nontoxic AdBlue® reducing agent, CO2 is reduced 12% and up to 95% of nitrogen oxide emissions are eliminated when compared to gasoline.

The intelligent choiceWith the spirit of the racetrack.

Audi TDI® racecars have dominated 24 Hours of Le Mans 13 times in 14 years. With all these facts in mind, maybe you are thinking an Audi TDI® might be your choice—which goes to show that clean diesel really is fuel for thought.

The future can look brighter

A cleaner futureIs beginning now.

With the TDI® clean diesel, Audi is pioneering the way for the vehicles and fuels of tomorrow. 12% lower CO2 emissions than gasoline, TDI® is kind to the planet and has superior fuel efficiency combined with more torque and quick acceleration. An unbeatable combination.*

Intelligent performanceEfficiency shouldn't feel this powerful.

Audi TDI® clean diesel technology is packed with low-end torque, giving you incredible acceleration and passing power. So even though you feel the power kick in at higher speeds, the ingenious TDI® engine helps reduce fuel consumption.

There's more to a dropFuel density is fuel destiny.

With astonishing benefits, TDI® exploits fuel, ensuring you get more from each drop. Each contains 15% more energy than gasoline, translating to 30% better fuel economy and 20% fewer trips to the pump. That's time you get back to experience all of life's little luxuries.

Take back the horizonEasy, with more than 650 miles per tank.

With more than 650 miles per tank, Audi TDI® clean diesel takes you farther than ever before. Drive from New York to Chicago or Dallas to Atlanta, it's all possible on one tank. Going farther has never been more elegant. So you can enjoy driving for 12 hours—on one tank.

2015 TDI® model lineup

With everything TDI® clean diesel has to offer, it's no wonder it's the intelligent choice. It starts with incredible performance, efficiency and a range second to none. It also turns out it could make the world a cleaner place—by cutting emissions by 12%.

Clean diesel technology explained

Understand how clean diesel technology impacts fuel efficiency and performance, while being a more eco-conscious choice.

Models of note

A6 TDI®Starting at $59,500
Q5 TDI®Starting at $48,100
A8 L TDI®Starting at $85,200

More Audi innovation

Explore more truth in engineering.

* Obey all speed and traffic laws. 2. 24 city/31 highway/27 combined mpg (2014 Q5 TDI® clean diesel with eight-speed Tiptronic® automatic transmission and Audi quattro® all-wheel drive). EPA estimates. Your mileage will vary.