The 2007 Audi Q7 is the world’s most powerful diesel passenger car, boasting a 6L V12 engine that generates an incredible 500hp and 738 ft-lb torque. It goes from 0-60 in just 5.5-seconds and has a top speed of 155mph. More pics after the jump.

The high-tech diesel engine, with the world’s first 29,000 psi Bosch Common Rail system…The V12 TDI transmits this power through a new six-speed tiptronic gearbox to the quattro permanent four-wheel drive system

[via Automotoportal]