From Infiniti press: The 2002 Infiniti Q45, the third generation of Infiniti’s flagship sedan, is a unique combination of exciting performance, dramatic styling, luxurious interior and innovative technology. It features a 340-horsepower V8 engine, voice-activated controls, an LCD information display screen, rearview monitor and one of the most powerful headlight systems in the world.
The 2002 Infiniti Q45, with its avant-garde styling and invigorating performance, went on sale in April 2001 at more than 150 Infiniti retailers nationwide
While the styling of the 2002 Q45 gives a strong impression, it’s what is under the hood that is most impressive. The Infiniti engineers’ primary objective was to greatly increase engine performance, but with an ear for quietness. The result is a 340-horsepower VK45DE 4.5-liter V8 with 333 lb-ft of torque – up 74 horsepower and 55 lb-ft from the previous generation. This is also more horsepower than most V8 competitors such as the Lexus LS430, Mercedes E430 and BMW 540 and 740 sedans.
The VK45DE is based on technology used in the award-winning VQ-series V6 engines found in the Infiniti I35 and QX4 and features technology developed from years of research and racing experience. Titanium valves, modular cylinder heads, microfinished crankshaft, lightweight pistons, super-silent single stage cam drive chain and a hydraulically driven cooling fan are all optimized for maximum performance while maintaining low noise levels.
In addition, the VK45DE is outfitted with a variable length air induction system and continuously variable valve timing control system to enhance the engine’s power delivery and operate efficiently.
The exceptional power of the 4.5-liter V8 is channeled through an all-new high-torque capacity electronically controlled 5-speed automatic with a manual shift mode. The 5-speed automatic, with its increased number of gear ratios, provides better acceleration and fuel mileage. Additionally, the new transmission is almost 50 pounds lighter than the 4-speed transmission it replaces.
An Electronic Torque-Demand Powertrain Control system manages engine power, throttle position, and the transmission gear selections to optimize smoothness and performance.