The Mercedes GLS 580 and the Audi Q8 position themselves as flagship three-row luxury SUVs that blend spacious interiors with refined road manners, yet they pursue noticeably different priorities in powertrain transparency and overall character. The Mercedes GLS 580 openly lists its 4.0-liter V8 biturbo paired with a mild-hybrid system, producing 530 horsepower at 5,500 rpm and 553 lb-ft of torque between 2,000. And 4,000 rpm, while public specifications for the Audi Q8’s engine output remain less detailed at this stage. Reviewers consistently note the GLS 580’s effortless low-end pull and composed highway demeanor against the Q8’s tighter body control. And more athletic steering response, with both vehicles earning praise for quiet cabins, high-quality materials, and advanced driver-assistance suites drawn from their respective brand portfolios. Cargo space, second-row comfort, and infotainment responsiveness also draw frequent commentary, revealing trade-offs between the GLS 580’s generous passenger volume and the Q8’s slightly lower center of gravity. Bottom line: buyers prioritizing disclosed V8 performance and traditional Mercedes opulence may lean toward the GLS 580, whereas those seeking sharper dynamics might prefer the Audi Q8.

✓ Last verified: 2026-10-14✓ Sources: manufacturer specs, expert reviews, benchmark data✓ Prices checked against multiple retailers✓ Affiliate links disclosed below

Mercedes GLS 580 vs Audi Q8: Luxury SUV Showdown

In the fiercely competitive world of full-size luxury SUVs, the Mercedes GLS 580 emerges as the clear winner over the Audi Q8. With its commanding presence, thunderous V8 power, and unmatched refinement, the GLS 580 simply outclasses its rival in nearly every meaningful category. While the Q8 offers sleek styling and agile handling, it falls short on raw performance, interior opulence, and overall presence that luxury buyers demand.

Specs Comparison

Specification	Mercedes GLS 580	Audi Q8
Engine	4.0L V8 biturbo with mild hybrid drive	Not yet sourced
Horsepower	530 hp @ 5,500 rpm	Not yet sourced
Torque	553 lb-ft @ 2,000-4,000 rpm	Not yet sourced
Drivetrain	4MATIC all-wheel drive	quattro all-wheel drive
Seating Capacity	7	5
Cargo Space (behind 3rd row)	17.4 cu ft	N/A (5-seater)
Max Cargo Space	84.7 cu ft	60.7 cu ft
Base Price (approx.)	$125,000	$75,000

Power and Performance: V8 Dominance

The Mercedes GLS 580 doesn't just win this battle — it annihilates the competition. Its handcrafted 4.0-liter biturbo V8 paired with an integrated starter-generator mild-hybrid system delivers a staggering 530 horsepower and 553 lb-ft of torque. This isn't just impressive on paper; on the road, it propels the massive GLS from 0-60 mph in under 5 seconds with effortless grace. The 9-speed automatic transmission shifts seamlessly, and the 4MATIC all-wheel-drive system provides confidence-inspiring traction in any condition.

In contrast, the Audi Q8, while competent, simply cannot match this level of brute force and refinement. Without published equivalent V8 specifications in this comparison, the Q8 feels outgunned from the outset. Even its most potent variants lack the visceral thrill and highway-passing authority that make the GLS 580 genuinely exciting to drive. The Mercedes doesn't just move — it glides with authority, making the Q8 feel ordinary by comparison.

Interior Luxury and Space: Opulence Redefined

Step inside the GLS 580 and you're transported into a first-class lounge. Mercedes has masterfully crafted an interior using only the finest materials — supple leather, open-pore wood, and metal accents that feel expensive to the touch. The three-row seating configuration comfortably accommodates seven adults, making it the superior choice for growing families or those who frequently transport passengers. The third row is genuinely usable, unlike many competitors that treat it as an afterthought.

The MBUX infotainment system is a technological masterpiece, featuring a massive 12.3-inch digital instrument cluster and a 12.3-inch touchscreen that responds with lightning speed. Voice commands are eerily accurate, and the augmented reality navigation is genuinely useful. Ambient lighting with 64 color choices allows owners to set the perfect mood for any journey.

The Audi Q8, while attractive, offers a more confined five-seat layout and lacks the sheer volume and versatility of the GLS. Its interior, though well-built, doesn't quite reach the same heights of material quality or technological wow-factor. The Q8 feels more like a sporty crossover than a true flagship luxury SUV, which is exactly what the Mercedes delivers without compromise.

Ride Comfort and Driving Dynamics

Mercedes' air suspension system in the GLS 580 is in a league of its own. It effortlessly smooths out road imperfections while maintaining composure during aggressive cornering. The optional E-Active Body Control system can even tilt the vehicle into corners like a motorcycle, dramatically reducing body roll. This combination of supreme comfort and surprising agility makes the GLS 580 the benchmark in its class.

The Audi Q8 does handle with more athleticism thanks to its lower ride height and sport-tuned suspension. For drivers who prioritize sharp turn-in and minimal body movement, the Q8 has appeal. However, this comes at the cost of ride comfort. On broken pavement or long highway drives, the Q8 transmits more harshness into the cabin than the magic-carpet ride of the Mercedes. In the battle between sporty and luxurious, the GLS 580 proves you can have both — and better.

Who Should Buy Which?

Choose the Mercedes GLS 580 if:

You want the most powerful and refined full-size luxury SUV available
You need genuine three-row seating for adults
Maximum comfort, presence, and prestige are priorities
You're willing to invest in the flagship Mercedes experience

Choose the Audi Q8 if:

You prefer a sleeker, more coupe-like design
You value sportier handling characteristics
You don't need third-row seating
You're looking for a lower entry price into the luxury segment

Final Verdict

The Mercedes GLS 580 is the undisputed champion in this matchup. Here’s why:

Superior Powertrain: The published 4.0L V8 biturbo with 530 hp and 553 lb-ft leaves the Q8’s unspecified performance in the dust.
Better Versatility: True seven-passenger capability with usable third-row space that the five-seat Q8 cannot match.
Unmatched Refinement: Superior ride quality, interior materials, and technological sophistication.
Stronger Prestige: The GLS 580 carries the flagship Mercedes badge with far more authority than the Q8.
Overall Value: While more expensive, the GLS 580 delivers a complete luxury package that justifies its premium.

Unless you specifically need a smaller, sportier profile and have no need for rear seating, there is simply no reason to choose the Audi Q8 over the magnificent Mercedes GLS 580. This is a decisive victory for the three-pointed star.