Audi has debuted the Audi Q7 4.2 TDI in Geneva. With 326PS and 760 Nm of torque, Audi claims it is the most powerful diesel SUV on the world market.


The 4.2 litre eight-cylinder V8 engine with common rail fuel injection and Piezo injectors also achieves a combined fuel economy figure of 25.4mpg.


Audi also says that the model has the drivability of a sports car. The Audi Q7 accelerates from standstill to 62mph in 6.4 seconds and has a top speed of 146mph.


The Audi Q7 4.2 TDI transmits its power through a six-speed tiptronic gearbox and a sportily tuned quattro driveline, which in normal situations splits propulsive force 40 percent to the front wheels and 60 percent to the rear axle.


Audi’s “adaptive air suspension” is standard on this most powerful of diesels – it unites dynamic handling with the ride comfort of the luxury class, the maker says.


The V8 TDI crankshaft is forged from chrome-molybdenum alloy steel; the cylinders are of cast aluminium. Low-friction roller cam followers actuate the 32 valves; electronically actuated flaps give the intake air into a defined swirl.


Audi says that the two turbochargers with variable-geometry turbines provide solid torque even at low engine speeds while still allowing a high power output.


Large charge-air coolers reduce the temperature of the compressed air.


The common rail fuel injection system contains compact Piezo inline injectors that are capable of up to five injection sequences per working cycle.