INFINITI QX80 vs Mercedes-Benz GLS | Side-by-Side Comparison
The INFINITI QX80 and Mercedes-Benz GLS represent opposite ends of the full-size luxury SUV spectrum. The GLS leans into German precision and cutting-edge tech, starting at $89,200 for the base GLS 450. The QX80 starts at $83,750 and pairs Japanese turbocharged performance with outstanding value. Both deliver premium seating and materials, but they prioritize different things.
Engine & Power
The QX80’s 3.5L twin-turbo V6 produces 450 hp and 516 lb-ft of torque – direct, uncomplicated, proven. The Mercedes GLS 450 uses a 3.0L turbocharged inline-six with 375 hp and 369 lb-ft, pairing it with a 48-volt mild-hybrid system. The GLS 580 (V8) delivers 510 hp, but that model starts at $114,800.
Horsepower-wise, the QX80 outguns the base GLS by 75 hp. Move to the GLS 580 and Mercedes takes the power lead – but you’re paying $31,000 more for it. The INFINITI’s turbocharged efficiency offers better real-world performance at a lower price point.
Towing & Capability
The QX80 tows 8,500 lbs. The Mercedes GLS doesn’t publish an official towing capacity, which tells you something about Mercedes’s marketing priorities – luxury and refinement over work capability. If towing matters, the INFINITI wins outright.
Pricing & Value Equation
The QX80 starts at $83,750. The GLS 450 starts at $89,200 – a $5,450 premium for less power. The GLS 580 jumps to $114,800. The GLS 450e plug-in hybrid also prices at $72,250 but with less towing and utility focused on emissions reduction rather than performance.
For value, the QX80 wins decisively. You’re getting more turbocharged power, better towing, and 7-8 seating for less entry price than Mercedes’s base offering.
Interior & Luxury
The Mercedes GLS interior is masterfully designed, with available Nappa leather, panoramic sunroof, and the MBUX infotainment system featuring dual 12.3-inch displays. It’s objectively beautiful and very advanced.
The QX80 counters with premium leather, wood trim, and an equally serene cabin. You won’t feel deprived in the INFINITI. The difference is refinement polish. Mercedes edges ahead, but not dramatically. Many buyers will find the QX80’s luxury completely sufficient and appreciate the $5,450+ savings.
Technology & Infotainment
Mercedes’s MBUX system is more advanced than INFINITI’s InTouch. Gesture controls, augmented reality navigation, and AI-driven features set the GLS apart. If leading-edge tech is essential, Mercedes delivers. If you need reliable, intuitive controls that don’t require a manual, the INFINITI satisfies.
Fuel Economy
The QX80 returns approximately 19 mpg combined (exact figures not published). The GLS 450 achieves 21-22 mpg combined, giving Mercedes a modest efficiency edge. Neither is a fuel miser. For long-distance highway driving, the GLS’s slight advantage adds up, but it’s not a deciding factor unless fuel economy is your primary concern.
Comparison Table
| Specification | INFINITI QX80 | Mercedes-Benz GLS 450 |
|---|---|---|
| Engine | 3.5L Twin-Turbo V6 | 3.0L Turbo I6 + Mild Hybrid |
| Horsepower | 450 hp | 375 hp |
| Torque | 516 lb-ft | 369 lb-ft |
| Towing Capacity | 8,500 lbs | Not published |
| Seating | 7-8 passengers | 7-8 passengers |
| Starting Price | $83,750 | $89,200 |
| Fuel Economy (Combined) | ~19 mpg | 21-22 mpg |
| AWD Standard | Yes | Yes |
Why Buy at INFINITI of Boerne
We’re conveniently located at 32275 Interstate 10, Boerne, TX 78006. We’ve earned three meaningful accolades that set us apart:
JD Power 2026 Dealer of Excellence – The first and only INFINITI dealer in Texas with this award. That’s measurable proof of our commitment to quality.
Best of the Best Car Dealer in Boerne – Voted by Boerne Star readers who know the local market.
INFINITI Award of Excellence Dealer – Recognized by INFINITI for sales and service excellence.
When you buy the QX80 from INFINITI of Boerne, you gain access to 70+ loaner vehicles, valet pickup and delivery within 100 miles, and complimentary washing. Mercedes dealerships in San Antonio or Austin may offer similar amenities, but they won’t know your name or prioritize your experience the way we do locally.
The GLS is an excellent SUV. But buy locally from INFINITI of Boerne and you’re supporting a dealership that’s been recognized for excellence in your region.
Test Drive the QX80 Today
Experience the power and value difference. We’re just off I-10, easy to reach from anywhere in the Hill Country.
(210) 477-1775
Monday-Friday 9AM-7PM | Saturday 9AM-6PM
INFINITI of Boerne | 32275 Interstate 10 | Boerne, TX 78006
Frequently Asked Questions
Does the QX80 really outpower the GLS 450?
Yes. The QX80’s 450 hp significantly exceeds the GLS 450’s 375 hp. You’ll feel the difference in acceleration and merging. The GLS 580 (510 hp) edges out the QX80, but you’ll pay $31,000 more for that advantage. For the base models, INFINITI wins on power and price.
Is the Mercedes technology worth the extra cost?
MBUX is more advanced than INFINITI’s system, featuring gesture controls and AI features. If cutting-edge infotainment is a priority, Mercedes delivers. If you value simplicity and reliability over flashy tech, the QX80’s InTouch system is perfectly adequate. Test both to decide what matters most to you.
Which holds its value better?
Both luxury brands hold value well. Mercedes may hold a slight edge due to brand prestige, but the QX80’s lower entry price and strong reliability mean your total cost of ownership will likely be lower. Factor in INFINITI of Boerne’s service benefits – free loaner access, valet service – and the QX80 becomes the smarter financial choice.
What’s included in the INFINITI of Boerne service package?
Within 100 miles of Boerne, you get valet service, 70+ loaner vehicles, and complimentary washing. You also benefit from our JD Power 2026 Dealer of Excellence designation, which guarantees top-tier service standards. Call (210) 477-1775 for details on warranty and maintenance plans.
