Infiniti Q45 is a full-size luxury car that served as the flagship of Nissan's Infiniti marque until 2006. It is a rear wheel drive luxury sedan powered by a V8 engine. The first Q45 came to market in 1989 as 1990 model. Car magazines and reviewers were impressed by the Q45's performance such as a 0-60 mph acceleration time of 6.7 seconds, and its high-output 4.5 L V8 engine rated at 278 hp (207 kW) and 292 ft·lbf (396 N·m) of torque.

The Q45 was completely redesigned for 2002, now based on the new platform shared by both the Cima and the President. This Q45 focused on performance again with a new 340 hp (253 kW) 4.5 L VK45DE V8 engine, gatling gun inspired HID headlights, and sharper styling.

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