A5 Coupe 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.

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 V6 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.

Introducing the Audi valvelift system

All petrol derivatives of the A5 also feature the Audi valvelift system. This innovation varies the valve lift between two levels which provides the car with better low-end torque and a more effective dynamic torque build up. The effect is a significant increase in engine efficiency, so you can get greater power and improved response from less fuel.

At a glance