The Audi RS Q8 takes the already impressive Q8 and injects it with serious performance. Under the hood sits a 591-hp twin-turbo 4.0-liter V-8 that propels this large luxury SUV from 0 to 60 mph in just 3.4 seconds in Car and Driver's testing. The RS Q8 impresses with its ability to combine brutal straight-line acceleration with surprisingly composed handling, aided by adaptive air suspension, rear-axle steering, and torque-vectoring all-wheel drive. The interior is a showcase of Audi's design prowess, with premium materials, comfortable seats, and the dual-touchscreen MMI infotainment system. The cabin is quiet and luxurious, making it a comfortable daily driver. However, the RS Q8's price tag is steep, and its fuel economy is abysmal, especially when driven enthusiastically. The ride can also be firm over rough pavement, and the steering lacks the feedback enthusiasts crave. Despite these drawbacks, Car and Driver regards the RS Q8 as a compelling performance SUV that offers supercar performance with the practicality of a family hauler, making it one of the most versatile vehicles in its segment.

MotorTrend's first test of the Audi RS Q8 delivered impressive numbers: 0-60 mph in 3.4 seconds and a quarter-mile in 11.7 seconds, cementing its status as one of the quickest SUVs on the market. The review praises the RS Q8's high-speed stability, the effectiveness of the Quattro all-wheel-drive system in launching, and the well-controlled body motions in Comfort mode. The interior earns high marks for its design, material quality, and the crisp, configurable Virtual Cockpit display. MotorTrend's criticisms include the steering's aloof feel, which lacks the feedback found in rivals like the Porsche Cayenne Turbo GT, and the RS Q8's significant curb weight, which becomes apparent in rapid direction changes. The testers also note the high as-tested price and terrible fuel economy as drawbacks. Overall, MotorTrend concludes that the RS Q8 is an immensely capable and luxurious performance SUV that offers devastating straight-line acceleration and a refined ride, even if it isn't the most engaging or communicative vehicle in its segment. It's a formidable package that will satisfy most performance-SUV buyers.