Infiniti's full-size SUV offers a luxurious interior with navigation as standard equipment. The V8 engine is smooth, powerful, and linked to a slick five-speed automatic transmission. The QX56 features an independent rear suspension system, and its handling is remarkably responsive for a vehicle this large and tall. However, ride quality is stiff and engine noise is quite pronounced. The interior is spacious, but the third-row seat is small. The 2008 model year brought some updates to the interior.