A4 Saloon Engines

Engines
A choice of engines

Thanks to Vorsprung durch Technik, making the choice between petrol and diesel engines isn't as straightforward as it used to be. Engines of both fuel types offer improved power, lower emissions, sporty performance and increased efficiency. Do you prefer the high-torque pulling power of a diesel or the increased response of a petrol engine?

The choice is yours.

TDI Explained
TDI: High economy diesel, low emissions, superb power

A dedication to pioneering technology has brought Audi peerless expertise in turbocharged diesel engines. All Audi TDI engines are equipped with common rail and piezo injectors to achieve smooth, efficient and quiet combustion. Diesel fuel related emissions are also significantly reduced thanks to a diesel particulate filter, fitted as standard, which filters out almost all soot particles contained in the exhaust gas.

The turbocharger has variable turbine vane geometry to help produce higher torque and greater power for the cubic capacity of the engine. And sophisticated air-flow control also contributes to the engine's capabilities while simultaneously reducing nitrogen oxide emissions.

TDIe. The 'e' is for efficient.
Audi is committed to reducing CO2 emissions from its vehicles and continuously develops new technologies to save you fuel. Find out more about the most fuel-efficient Audi A6 ever, by clicking the link below.

TFSI & FSI Explained
TFSI: Direct injection petrol and turbocharging combined

TFSI technology unlocks superior power, more dynamic performance and better economy from petrol engines. In fact, compared with many naturally aspirated engines with more cylinders, TFSI delivers the same sporty performance but using 10 to 15% less fuel.

FSI and turbocharging technology work so well together because the evaporation of fuel in the combustion chamber cools the intake air giving higher compression, improved engine efficiency and, in turn, lower CO2 emissions.

Racing Heritage
A proud racing pedigree

Over 70 years of successful competitive motor racing, we've learnt a lot about building high-performance, class-leading cars. But the knowledge we've built on the track doesn't just stay there; a surprising amount of thoroughbred racing technology finds its way into our production cars. From the ergonomic design of the cockpit to the power of the engine, there's racing pedigree in every Audi.