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The 2006 Q45 is a 4-door, 5-passenger luxury sedan, available in one trim only, the Sport. The 2006 Q45's closest competitors include the Audi A8, the Maserati Quattroporte, and the Volkswagen Phaeton.
Upon introduction, the Q45 is equipped with a standard 4.5-liter, V8, 340-horsepower engine that achieves 17-mpg in the city and 24-mpg on the highway. A 5-speed automatic transmission with overdrive is standard.
The 2006 Q45 is a carryover from 2005.