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2009 Audi Q7 V12 TDI


2009 Audi v12 diesel.500hp grunt machine with the fully luxury of this top of the range Audi, full history available,

A diesel-powered Audi RS? The company decided against it so as not to limit this SUV’s appeal, but we wouldn’t have objected. The straight-line performance of the Q7 V-12 TDI is impressive. From 1750 through 3250 rpm (the redline is a low 4500 rpm, typical for a diesel), it delivers an earth-melting 738 pound-feet of torque. The long, flat ceiling of the torque curve suggests that more would easily have been possible, were it not for concerns about the transmission’s durability. Even so, this Q7 uses a strengthened six-speed ZF HP32—the biggest, strongest unit available on the market. Power for the diesel is rated at a flat 500 horsepower.

On the road, few cars can keep up. Audi says the 0-to-62-mph sprint takes 5.5 seconds, and—more impressive—112 mph is achieved in 15.7 seconds. These figures, which we haven’t verified with test equipment, seem absolutely credible. Power is instantly available. Push the throttle, and you get treated to an evil growl as the Q7 lurches forward. We were surprised at the elevated sound level. Audi wants it that way, though, and in fact, it’s almost completely designed into the exhaust system. The 6.0-liter V-12 works smoothly and quietly otherwise,At 155 mph, a governor kicks in. The theoretical top speed is 171 mph in standard configuration, and 176 mph would be possible with minor tweaks. But the cutoff is fine with us, since it is part of a voluntary agreement by the German auto industry that has thus far helped to keep the autobahn unfettered by an overall speed limit. After all, we prefer a real 155 mph to a theoretical 176.

This 6.0-liter V-12 is completely new, but it shares components with Audi’s family of V-6, V-8, and V-10 engines. Audi wants you to believe this engine is derived from that of the Le Mans–winning R10 TDI race car, but there are few commonalities besides the high-pressure common-rail injection system

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