Understanding the Engine in the New INFINITI QX80 and the Legacy of INFINITI V8 Powertrains

January 16th, 2026 by

When exploring the capabilities of luxury SUVs in the Winston-Salem area, especially those near Lewisville and Kernersville, a common question arises: What engine is in the new INFINITI QX80? This question is vital for anyone considering a powerful, reliable, and luxurious full-size SUV. At Modern INFINITI of Winston-Salem, located at 1500 Peters Creek Pkwy, Winston-Salem, NC 27103, we provide comprehensive insights into the new QX80’s engine, its relationship to previous V8 models, and how this impacts performance and ownership experience in communities like Walkertown and Clemmons.

For those seeking expert guidance or to explore our inventory, call us at (336) 767-7800 or browse our new vehicles. Whether you’re in Thomasville, Rural Hall, or advancing through the buying process, this article will clarify everything about the QX80’s engine, Infiniti’s V8 heritage, and the expected longevity of these vehicles.

Table of Contents

Engine Specifications of the New INFINITI QX80

The 2026 INFINITI QX80 is a significant evolution in Infiniti’s flagship SUV line, departing from the traditional large-displacement V8 engine to embrace a more efficient yet powerful 3.5-liter twin-turbocharged V6. This engine change reflects a broader industry trend favoring turbocharged smaller displacement engines to meet stricter emissions standards without sacrificing performance.

This 3.5L V6 engine, also found in the sportier INFINITI Q50 RED SPORT 400, has been optimized for the QX80 to accommodate its three-row luxury seating and substantial curb weight. It delivers:

  • 450 horsepower and 516 lb-ft of torque, offering robust acceleration and towing capabilities.
  • A towing capacity of up to 8,500 pounds, matching or exceeding many traditional V8-powered SUVs.
  • A twin-turbo setup that ensures responsive throttle input and smooth power delivery across a wide rpm range.

By replacing the previous 5.6L V8 with this twin-turbo V6, INFINITI has improved fuel efficiency while maintaining the QX80’s hallmark power and towing performance. This balance is essential for drivers in areas such as Mocksville and Germanton, where long highway drives and variable terrain demand both strength and efficiency.

Real-world driving scenarios in the Winston-Salem metropolitan area demonstrate the benefits of this powertrain. The twin-turbo V6 allows for confident merging on highways near Grandview Crossing, while the refined engine tone enhances the luxurious cabin experience, a crucial factor for families traveling within nearby communities like Walnut Cove and Linwood.

Technical Highlights and Performance Metrics

  • Engine Type: 3.5-liter V6 twin-turbocharged direct injection
  • Horsepower: 450 hp @ 5,600 rpm
  • Torque: 516 lb-ft @ 1,600-4,800 rpm
  • Transmission: 9-speed automatic with adaptive shift logic
  • Drivetrain: Available in rear-wheel drive and four-wheel drive configurations
  • Fuel Economy: Improved over the prior V8 with estimated combined EPA ratings of roughly 18 mpg, depending on drivetrain

This transition to a twin-turbo V6 marks Infiniti’s commitment to innovation while preserving the vehicle’s luxury and utility. Drivers in areas like TobaccoVille and King appreciate this modern engineering for its blend of power and efficiency.

Which INFINITI Models Have Featured V8 Engines?

Infiniti’s legacy with V8 engines is storied and foundational to its image as a luxury and performance brand. The V8 powertrain was once the heart of Infiniti’s flagship vehicles, most notably:

  • The Q45 sedan, Infiniti’s inaugural model launched in 1989, featured a 4.5-liter naturally aspirated V8 engine producing 278 horsepower and 292 lb-ft of torque, setting a standard for luxury performance sedans.
  • The Q70 sedan (and its long-wheelbase Q70L variant), produced between 2014 and 2019, was equipped with the VK56VD 5.6-liter V8 engine. This naturally aspirated V8 delivered 420 horsepower and 417 lb-ft of torque, enabling a sporty yet comfortable ride with 0-60 mph acceleration in under five seconds.
  • The QX80 SUV, Infiniti’s flagship full-size SUV, used a 5.6-liter V8 continuously from the early QX56 days until 2024. This powerhouse offered roughly 400 horsepower and 413 lb-ft of torque, capable of towing heavy loads and commanding a luxurious, spacious cabin.

Infiniti’s V8 offerings, especially in the QX80, were not only about raw power but also about the driving experience, including deep exhaust notes and smooth power delivery appreciated by drivers near Clemmons and Advance. The V8 engine’s robust construction ensured substantial longevity, making these vehicles popular in neighboring areas like Lewisville and Kernersville for those requiring dependable performance for towing or long-distance travel.

Comparing the V8 to the New Twin-Turbo V6

While the V8 engines delivered a classic muscle-like feel with impressive torque and horsepower, the new twin-turbo V6 in the QX80 brings:

  • Enhanced fuel efficiency, addressing concerns especially relevant to drivers commuting from Germanton or Rural Hall.
  • Comparable or superior towing capacity, matching the V8’s 8,500-pound rating.
  • A lighter engine weight contributing to improved handling and ride comfort.
  • Modern emission compliance without sacrificing Infiniti’s signature performance.

This shift aligns INFINITI with industry standards where turbocharged smaller engines replace large naturally aspirated powerplants for a better balance of power, efficiency, and environmental responsibility.

What is the Life Expectancy of the INFINITI QX80?

Owners of the INFINITI QX80, whether in Winston-Salem, Lexington, or nearby towns like Coventry and King, often ask about the longevity of this luxury SUV, especially considering its heavy-duty capabilities and intricate engineering.

With proper maintenance, the QX80 is designed to be a durable vehicle capable of exceeding 200,000 miles, with many owners reporting mileage well beyond 250,000 miles and some even reaching 300,000 miles. The robust construction, especially in V8-powered models, contributes to this extended lifespan.

Key Maintenance Considerations for Longevity

  • Regular Oil and Fluid Changes: Adhering to oil change intervals every 5,000 to 7,500 miles is crucial. Using manufacturer-recommended synthetic oils helps protect the engine’s internals.
  • Transmission Care: The QX80’s 7-speed (previously) and now 9-speed automatic transmissions require timely fluid changes and inspections. Some models, particularly past V8 versions, may experience transmission wear after 170,000 miles, emphasizing the need for scheduled service.
  • Timing Chain and Fuel System: The high-pressure fuel pump (HPFP) and timing chain are wear points that may require attention beyond 150,000 miles but are generally reliable with routine maintenance.
  • Suspension and Brake Components: Given the QX80’s size and towing use, brakes, shocks, and suspension parts may need replacement more frequently, especially when driven on rougher roads near communities like Walnut Cove or Linwood.

Driving Habits and Environmental Impact

Smooth driving, avoiding aggressive acceleration and heavy braking, contributes significantly to extending the vehicle’s life. For example, drivers commuting from Tobaccoville or Advance on highways and city streets will benefit from consistent driving patterns that reduce wear on critical components.

Owners should also consider the impact of weather and road conditions common to the Winston-Salem region. Seasonal maintenance and inspections at trusted service centers, such as the service department at Modern INFINITI of Winston-Salem, play a vital role in ensuring long-term reliability.

Maintaining Your INFINITI: Service, Trade-In, and Parts Resources

Modern INFINITI of Winston-Salem offers comprehensive support to INFINITI owners throughout the Yadkinville and Thomasville areas, ensuring your vehicle remains in excellent condition. Whether you own a new 2026 QX80 or a pre-owned V8-powered model, our services cover all aspects of upkeep.

Regular maintenance using OEM parts preserves your vehicle’s performance and safety, especially important for families in communities like Kernersville and Tobaccoville who rely on their INFINITI SUVs for both daily driving and recreational activities.

Why Buy from Modern INFINITI of Winston-Salem?

Choosing Modern INFINITI of Winston-Salem, serving the greater Charlotte and Lexington regions, means gaining access to a dealership dedicated to transparency, quality, and customer satisfaction. Our commitment is demonstrated through our SmartBuy Pre-Owned Vehicles program, where “Confidence Comes Standard.” This includes:

  • A thorough 150-point quality assurance inspection on every pre-owned vehicle.
  • The inclusion of a CARFAX vehicle history report for peace of mind.
  • An exclusive warranty on most vehicles, backed by our dealership.
  • A 3-Day/300 Mile Vehicle Exchange Program to ensure you love your purchase.
  • Complimentary North Carolina state inspections for life.
  • Free rental cars for warranty-covered repairs and towing allowances.

Our Internet Value Pricing ensures competitive, real-time pricing without inflated markups, making your purchase both smart and straightforward. As we welcome customers from nearby areas such as Rural Hall, Linwood, and Walnut Cove, we look forward to helping you experience the MODERN difference.

For those ready to explore options, check out our used vehicles or browse our new vehicles today.

© 2026 Modern INFINITI of Winston-Salem

Posted in 2026 INFINITI QX80