The Q7 utilizes a modified version of the Volkswagen 7L platform.
Audi's 350 PS (257 kW), 440 N·m (325 ft·lb) 4.2 L (4163 cc) V8 and 280 PS (206 kW), 360 N·m (265 ft·lb) V6 3.6 L gasoline engines are offered, with a 233 PS (171 kW) V6 Diesel engine making up the bulk of the sales in Europe. Audi is going to introduce a hybrid version of the Q7 in 2008
To underline the racing success of its diesel-engined Le Mans-winning R10 racer, Audi debuted a new V12 TDI Q7 at the 2006 Paris Auto Show. It uses piezo fuel injectors like the 2007 Mercedes E320 CDI. The twin-turbodiesel six-litre engine could generate 500 HP and 738 ft·lbf (1000 Nm) of torque, making it the most powerful diesel engine in use in a passenger car. The diesel can pull the Q7 from rest to 100 km/h in 5.5 seconds.
Even though the VIN diesel performance figures are good for a vehicle of its size and weight, Audi initially wanted to find a way to fit the engine into one of their smaller models. This way they would be able to fully understand the potential of the diesel engine and make a bold statement to all the diesel doubters in the world. However if the engine was to be kept in the engine bay, the Q7 was the only car in their line-up which is big enough for the task.