Infiniti Q70 Vs Audi A6: Head-To-Head Luxury Sedan Review

Luxury sedans represent the pinnacle of automotive engineering, blending power, comfort, and advanced technology into daily drivers that turn heads and deliver exceptional experiences. In this head-to-head battle, we pit the bold Infiniti Q70 against the sophisticated Audi A6. Both vehicles target executive buyers seeking refinement without compromise, but they approach luxury from different angles: the Q70 emphasizes raw power and driver engagement, while the A6 prioritizes efficiency, all-wheel stability, and premium build quality. Drawing from detailed specs and performance data, this analysis breaks down every key aspect to reveal which car truly excels.

Powertrains and Performance: Muscle vs Precision

At the heart of any sedan lies its engine, and here the rivals diverge sharply. The Infiniti Q70 boasts a robust **3.7-liter V6** pumping out **330 horsepower** and **270 lb-ft of torque**, paired with a seven-speed automatic transmission and rear-wheel drive for a thrilling, traditional driving feel. This setup delivers blistering acceleration, making it ideal for enthusiasts who crave straight-line speed and dynamic handling on open roads.

In contrast, the Audi A6 starts with a more modest **2.0-liter turbocharged four-cylinder** producing **252 horsepower** and **273 lb-ft of torque**, also mated to a seven-speed automatic, but with available quattro all-wheel drive for superior grip in varied conditions. Higher trims like the 3.0T supercharged V6 offer **340 horsepower**, and the S6’s 4.0-liter twin-turbo V8 leaves the Q70 in the dust for outright performance. While the Q70’s V6 feels more potent in base form, the A6’s lineup scales better for speed demons.

The Q70’s rear-drive bias appeals to purists, offering playful tail-happy dynamics, but the A6’s quattro system shines in rain or snow, providing confident traction. Steering in the Q70 is sharp with a tighter turning circle (37 ft vs 39 ft), enhancing urban maneuverability. Braking is solid across both, with four-wheel discs and stability control standard. Ultimately, power favors the Q70 initially, but the A6’s versatility wins for all-season performance.

Fuel Efficiency: Efficiency Champion Emerges

Fuel economy is a critical factor for luxury buyers logging high miles. The Audi A6 dominates here, with its base engine achieving an EPA-rated **24 city / 34 highway mpg**, translating to over 100 extra miles per tank compared to rivals. Even the hybrid Q70 variant only reaches **28 city / 33 highway**, while the standard model lags at **18 city / 25 highway** due to its thirstier V6.

In metric terms, the A6 averages around 9L/100km combined, versus the Q70’s 11.2L/100km—respectable for its power but no match for Audi’s efficiency. This gap compounds over time, potentially saving A6 owners thousands in fuel costs annually, especially with rising prices.

• A6 Advantages: Turbo efficiency, diesel/hybrid options in some markets.
• Q70 Drawbacks: Heavier V6 guzzles more, limiting long-trip appeal.

Dimensions and Practicality: Space for the Whole Crew

Both sedans seat five comfortably, but subtle differences matter. The Q70 edges out in interior volume at **104 cu ft passenger space** versus the A6’s 97 cu ft, with more front legroom (44 in vs 41 in) and rear hip room (54 in). Trunk capacity is close: 15 cu ft for Q70, 14 cu ft for A6.

Overall, the Q70 measures slightly longer (195 in vs 194 in) with a shorter wheelbase (114 in vs 115 in), aiding agility. Width is similar (73-74 in), but the A6’s track is wider rear (64 in vs 62 in) for better stability. Families will appreciate the Q70’s roomier cabin, while the A6 feels more planted on highways.

Interior Luxury and Comfort: Opulent Cabins Compared

Luxury defines these cars, and both deliver plush leather, wood accents, and quiet rides. The Q70 stands out with **standard cooled front seats**, a premium touch absent on base A6 models. However, the A6 counters with **standard rear air conditioning**, enhancing passenger comfort on hot days.

Build quality tilts toward Audi, known for its meticulous German engineering and softer materials. Infiniti’s cabin is upscale but can feel less refined over time. Both offer power-adjustable seats, dual-zone climate, and ample storage, but the Q70’s extra space makes it cozier for taller drivers.

Technology and Infotainment: Screens and Connectivity

Modern buyers demand tech, and the A6 leads with **standard Apple CarPlay and Android Auto**, plus a superior virtual cockpit digital gauge cluster. The Q70 includes Bluetooth but lacks seamless smartphone integration. Audio systems are strong in both—Bose in Q70, Bang & Olufsen optional in A6.

Navigation, wireless charging, and heads-up displays appear in higher trims, but Audi’s MMI interface feels more intuitive than Infiniti’s dual-screen setup.

Safety and Driver Assistance: Protection Priorities

Safety is non-negotiable. Both feature **stability control, backup cameras, and blind-spot monitoring** as standard. The A6 adds **automatic emergency braking**, while the Q70 offers **adaptive cruise control and lane-keeping assist**—features missing on base Audi.

• Shared: Traction control, multiple airbags.
• Q70 Edge: Proactive assists like lane keep.
• A6 Edge: Pre-collision tech.

Crash test ratings favor Audi historically, thanks to superior structural rigidity.

Pricing and Ownership Costs: Value for Money

Starting prices are close: A6 at around **$48,550-$49,700**, Q70 at **$50,300-$51,005**. Audi’s better efficiency and resale value offset the slight premium. Warranties: Q70 offers 4 years/60,000 miles basic, edging A6’s 4/50,000. Maintenance favors Audi’s denser dealer network.

Driving Experience: On the Road Verdict

Behind the wheel, the Q70 thrills with its V6 punch and rear-drive balance, excelling on twisty roads. The A6, however, offers a more composed ride, with quattro damping imperfections and providing serene highway cruising. Noise isolation is better in the Audi, making it the choice for long hauls.

Pros and Cons: Quick Reference

Infiniti Q70

• Pros: Potent V6 power, spacious interior, cooled seats standard, engaging RWD handling.
• Cons: Poor fuel economy, dated tech, higher base price.

Audi A6

• Pros: Excellent efficiency, superior AWD grip, modern infotainment, refined build.
• Cons: Less base power, no cooled seats standard, pricier options.

Who Should Buy What?

Choose the **Infiniti Q70** if you prioritize muscle, space, and value-driven luxury for spirited drives. Opt for the **Audi A6** for efficiency, tech-forward features, and all-weather confidence—it’s the more well-rounded executive sedan. In real-world tests, the A6 often edges out for overall usability.

Frequently Asked Questions (FAQs)

Which is faster, the Infiniti Q70 or Audi A6?

The Q70’s 330 hp V6 gives it a base acceleration edge, but A6 higher trims like the S6 surpass it.

Is the Audi A6 more fuel-efficient?

Yes, with up to 34 highway mpg versus the Q70’s 25 mpg max.

Does the Q70 have all-wheel drive?

No, it’s rear-wheel drive only, unlike the A6’s quattro option.

Which has better warranty coverage?

Q70 offers 60,000 miles vs A6’s 50,000.

Are these cars reliable long-term?

Audi edges in resale and dealer support, but both require premium maintenance.