INFINITI QX80 vs Mercedes-Benz GLS 580 | Side-by-Side Comparison

The INFINITI QX80 and Mercedes-Benz GLS 580 are both flagship three-row luxury SUVs competing for the same buyers. The QX80 starts at $83,750 with 450 hp and 516 lb-ft of torque. The GLS 580 starts at approximately $103,000 with 516 hp. Both are powerful, both are luxurious, but they take different approaches. Let’s compare them directly so you can see which aligns with your values.

Engine Power and Performance

The QX80’s 3.5-liter twin-turbo V6 produces 450 hp and 516 lb-ft of torque. It accelerates smoothly, merges confidently, and tows with authority. Performance is abundant without feeling excessive.

The GLS 580’s 4.0-liter twin-turbo V8 produces 516 hp and 589 lb-ft. The additional V8 cylinders add 66 hp and 73 lb-ft compared to the QX80. On paper, the GLS 580 is faster. In real-world Texas driving, the difference is modest. Both accelerate decisively. Both merge without hesitation.

Winner: GLS 580 for raw horsepower. QX80 for practical power that costs $20,000 less.

Towing Capacity

The QX80 tows 8,500 lbs. This handles most boat trailers, travel trailers, and cargo hauling.

The GLS 580 tows approximately 7,700 lbs. It’s capable but slightly lower than the QX80.

Advantage: QX80 for towing capacity.

Price Comparison

The QX80 starts at $83,750. The GLS 580 starts at approximately $103,000. That’s a $19,000+ price gap before options. In the Texas market, that difference buys a lot of value.

When you factor in maintenance costs, the QX80 becomes even more appealing. INFINITI service typically costs less than Mercedes service.

Fuel Efficiency

The QX80 achieves approximately 16-18 mpg combined. The GLS 580 achieves approximately 15-17 mpg. Both are thirsty V6 or V8 engines towing heavy vehicles. The efficiency difference is negligible.

Technology and Infotainment

Both vehicles offer premium infotainment systems. The QX80 includes ProPILOT Assist 2.1, a advanced semi-autonomous driving system. The GLS 580 offers comparable driving assistance systems. Both integrate Apple CarPlay and Android Auto.

The QX80’s navigation system integrates with ProPILOT to adjust speed for curves and exits automatically. The Mercedes system offers similar functionality. In practical use, both systems enhance highway driving.

Interior Space and Seating

Both vehicles seat seven across three rows. The GLS 580 feels marginally roomier due to its larger overall footprint. The QX80 provides excellent three-row comfort without feeling cavernous.

The GLS 580’s interior materials may feel slightly more opulent (hand-stitched leather, wood trim). The QX80’s interior is genuinely luxurious without excess. It’s a choice between maximum prestige and practical luxury.

Reliability and Service

INFINITI vehicles have strong reliability ratings from independent sources. QX80 ownership involves straightforward maintenance and lower service costs. Mercedes vehicles require specialized service, often at higher costs.

INFINITI of Boerne offers 70+ loaner vehicles and valet service while your QX80 is being maintained. You’re rarely without transportation.

Which Vehicle Fits Your Lifestyle?

Choose the INFINITI QX80 if: You value strong performance without overspending. You want excellent towing capacity. You prefer lower service costs and straightforward maintenance. You prioritize dealer service and local support.

Choose the Mercedes GLS 580 if: You want maximum horsepower and prestige branding. You prefer Mercedes’ global service network. You value the highest-level luxury finishes. You’re willing to pay $20,000+ more for brand recognition.

Comparison Table

Why INFINITI of Boerne

Located at 32275 Interstate 10, Boerne, TX 78006. We’re the JD Power 2026 Dealer of Excellence, the first INFINITI dealer in Texas. We also won Best of the Best Car Dealer in Boerne and hold the INFINITI Award of Excellence.

The QX80 gets you everything the GLS 580 offers – luxury, power, three-row seating, advanced technology – while saving $20,000. Add our 70+ loaner vehicles, valet service, and complimentary maintenance, and the value gap widens further.

Don’t let badge prestige override value. The QX80 is a genuine flagship that competes with the best in the world at a more sensible price.