From Infiniti press: Infiniti’s flagship premium luxury sedan, the powerful and elegant Q45, has been refined for the new model year with a more distinctive, more aggressive exterior appearance, a more indulgent interior and a number of key performance enhancements. The new Q45 includes the best equipment from the previous Luxury model and Journey Package in one fully equipped model. The new Premium Package offers the ultimate in luxury and performance equipment, including a new 18-inch wheel design. The 2005 Infiniti Q45 went on sale at Infiniti dealerships nationwide in late August 2004.
The long list of exterior changes from the 2004 Q45 include new front and rear fascias, restyled hood and grille, new headlights and integrated fog lamps, restyled trunk lid and finisher, LED taillights and new fine-line chrome trim. Inside, the 2005 Q45 adds to its extensive array of luxurious appointments with new sport contour seats, new all-white meter cluster and soft touch control cluster finish, an all-new metal-trimmed shifter bezel and rich genuine dark maple wood and chrome accents.
As always, the styling of the Q45 gives a strong impression of performance and what’s under the hood clearly delivers on that promise. Standard on every Q45 is Infiniti’s highly regarded 4.5-liter V8, which is also utilized in the FX45 premium crossover SUV and the upcoming 2006 Infiniti M45 performance sedan. In the Q45, this engine produces 340 horsepower and 333 lb-ft of torque.
The engine features titanium valves, modular cylinder heads, microfinished crankshaft, lightweight pistons and a super-silent single stage cam drive chain. In addition, the V8 is outfitted with a variable length air induction system and Continuously Variable Valve Timing Control System (CVTCS) to enhance the engine’s power delivery and operation efficiency.
The exceptional power of the 4.5-liter V8 is channeled through a high-torque capacity, electronically controlled 5-speed automatic transmission with manual shift mode, which features a short final drive gear ratio of 3.133:1 for strong acceleration.
An Electronic Torque-Demand Powertrain Control system manages engine power, throttle position and the transmission gear selections to optimize performance and smoothness. For 2005, the transmission has been recalibrated to improve downshift response and acceleration smoothness.