2015 Infiniti Q70 S 5.6: 0-60 Time, Specs, and Features [2024 Updated]

By: Max F. Arellano / February 17, 2024

The 2015 Infiniti Q70 S 5.6 is a luxury sedan with a 0-60 mph time of 4.9 seconds and a quarter-mile time of 13.5 seconds, as reported by Motor Trend.

Powered by a 5.6-liter V8 engine that produces a robust 420 horsepower and 417 lb-ft of torque, the Q70 S 5.6 certainly doesn't lack in terms of raw power.

However, while it delivers above-average straight-line acceleration, some critics argue that it's not as nimble or engaging to drive as some rival luxury sedans.

The engine is mated to a seven-speed automatic transmission, and there's no manual gearbox option, which may disappoint driving enthusiasts.

The Q70 S 5.6 is exclusively rear-wheel drive, which can limit its appeal to those in colder climates who may prefer an all-wheel drive system for better traction.

Design wise, the Q70 S 5.6 stands out with its sleek and athletic aesthetic. The aggressive front grille, swooping body lines and 20-inch alloy wheels give it a sporty stance, while the LED headlights and taillights add a touch of sophistication.

Inside, the Q70 S 5.6 offers a wealth of amenities. The cabin is spacious and comfortable, featuring semi-aniline leather-trimmed seats, a power sunroof, and dual-zone automatic climate control.

The infotainment system, however, can be a bit challenging to navigate with its numerous buttons and lack of a touch screen.

The sound system, a 10-speaker Bose setup, delivers excellent audio quality.

In terms of safety, the Q70 S 5.6 is equipped with a range of advanced technologies, including a rearview camera, forward collision warning, and automatic emergency braking.

However, it lacks some of the latest driver-assistance features found in newer luxury cars.

2015 Infiniti Q70 S 5.6 0-60 time analysis

While 4.9 seconds in a vacuum is a good 0-60 time, for an MSRP of $68,000, it was not that exceptional in 2015, especially compared to its direct rivals.

2015 Infiniti Q70 5.6 Primary Rivals

       
• BMW 5 Series (550i): Known for dynamic handling, powerful engines, and cutting-edge technology. The 550i featured a V8 engine for high performance.

  With an MSRP of $63,000 and a 0-60 time of 4.5 seconds, it offered better value from a performance standpoint.

       
• Mercedes-Benz E-Class (E550): Focused on comfort, luxury, and safety features. The E550 model came with a V8 engine, blending performance with luxury.

  The 2014 sport 4MATIC trim got to 60 in 4.5 seconds and was $7000 cheaper.

       
• Audi A6 (3.0T and S6): Noted for its all-wheel-drive system, elegant interior, and powerful engines. The 3.0T and S6 models offered supercharged or turbocharged engines for spirited driving.

  The 2016 3.0T Prestige quattro would get to 60 in 4.5 seconds as well, and like the Mercedes cost just $61,000.

   

These 3 models all compete in the luxury-sedan market and were cheaper and had better performance, which paints kind of a bleak picture for the Q70, and it doesn't help that it was also often criticized as soulless.

So why would anyone buy a Q70, is it simply an inferior car?

Infiniti Q70 5.6: Beyond Speed and Cost

The Infiniti Q70 5.6, while competing with faster and possibly more affordable options like the BMW 5 Series, Audi A6, and Mercedes-Benz E-Class, presents a unique proposition in several areas.

Distinctive Styling

The Q70 stands out with its elegant and bold design, offering a refreshing alternative to the more common aesthetics of its German rivals.

Its distinctive styling commands attention and distinguishes it as a luxury sedan with character.

Spacious and Comfortable Interior

Infiniti's commitment to comfort is evident in the Q70's generous interior space, providing ample legroom and a plush environment for all occupants.

This focus on interior luxury enhances its appeal for those prioritizing comfort and space.

Feature-Rich for the Price

Despite its pricing, the Q70 often includes a more comprehensive suite of standard features compared to its competitors, offering better value for luxury car buyers who seek advanced technology and conveniences without additional costs.

Brand Philosophy and Customer Service

Infiniti's approach to luxury extends beyond the vehicle itself, emphasizing personalized customer service and a stress-free buying experience.

This philosophy can be a significant draw for buyers seeking a more personal connection in their luxury car purchase.

Driving Dynamics and Comfort

Though not the fastest, the Q70 offers a balanced driving experience that doesn't compromise on comfort.

Its ride is both serene and engaging, appealing to those who desire a luxury sedan that excels in more than just performance metrics.

Takeaway

The Infiniti Q70 5.6's appeal lies in its unique combination of design, comfort, value, and brand ethos. It provides a compelling choice for luxury car buyers who value these aspects as much as if not more than, outright speed and cost efficiency.

To categorize it as a "worse" car is to overlook the diverse priorities of luxury sedan consumers, among whom the Q70 has carved out its rightful niche.

How does it compare to its siblings?

If you are someone who's enticed but what the 2015 Q70 has to offer, you might be looking for a comparison with other Q70s.

The Infiniti Q70 was available in several trims, primarily differentiated by their engine options and drivetrain configurations. The most common trims included:

 
• Q70 3.7: Powered by a 3.7-liter V6 engine, producing 330 horsepower.
 
• Q70 5.6: Equipped with a more powerful 5.6-liter V8 engine, offering 420 horsepower.
 
• Q70 Hybrid: Featured a hybrid powertrain combining a 3.5-liter V6 engine with an electric motor, resulting in a combined output of around 360 horsepower.
 
• Q70L: A long-wheelbase version available with the same engine options as the standard Q70 but offering more rear-seat legroom.
 
• Q70S: A sportier variant of the Q70 available with the 3.7-liter V6 or 5.6-liter V8 engine options.

  It includes sport-tuned suspension, enhanced braking systems, and unique styling elements like larger wheels, sport seats, and special exterior and interior design accents to emphasize its performance-oriented nature.

Key Features and Updates by Year

 
• 2014: Introduction of the Q70, replacing the Infiniti M. It carried over much from its predecessor but under a new naming convention.
 
• 2015: Introduction of the Q70L long-wheelbase model, providing additional rear legroom.

  A refresh included exterior styling updates, enhanced interior materials, and new features like LED headlamps.

 
• 2016-2017: Minor updates, including some changes to package options and standard equipment levels. The Infiniti InTouch infotainment system with navigation became standard on most trims.
 
• 2018: Introduction of more advanced safety features across more trims, including forward collision warning, automatic emergency braking, and pedestrian detection.
 
• 2019: Last year of production for the Q70. The lineup was streamlined, and special editions were introduced to commemorate the model's end of production.

Notably, the 2015 version of the Q70 was quicker than the 2017 model by more than half a second. The two cars had the same engine, but the 2017 version weighed about 100 pounds more.

Car and Driver would note that the 2015 6-cylinder version of the Q70 was only .1 seconds slower to 60mph than the 2017 model, even though the 2017 model had the V8 engine.

The 2015 Q70 5.6 S's 0-60 time was never surpassed by any of the subsequent models, with 2019 being the last model year produced.

Given this information, it would appear that the 2015 model year would be the best one to buy if performance is your main concern, with a used 2015 Q70 5.6 valued at between $18,000 - $22,000 according to Kelly Blue Book.

What's next for the Q70?

In 2023 Infiniti held a meeting in Los Angeles where the discussed their future plans, part of which is an electrified Q70 expected to debut at the end of 2026.

According to Carscoops, the new design bares resemblance to a Tesla Model S, with a Porsche-like rear end.

Conclusion

The 2015 Q70 S 5.6's 0-60 time is underwhelming given its cost, and also when compared to its rivals. However, within its own lineage, it is the standout model.