There's a risk in bending to the will of a fashion trend versus sticking with a classic design. When the Infiniti Q70 debuted in 2011 as the M sedan, it was unique for its organic flowing shapes and unconventional cabin materials. In a short four years, the style of Infiniti's largest sedan is looking more and more out of date. Outside of style, the 2015 Infiniti Q70 also suffers from other maladies that place its competitors in a more favorable light. As a luxury sedan, the Q70's ride quality falls well short of the type of smooth isolation that other cars provide. Normally, we'd expect this kind of stiffness to result in more athletic handling, but the vague behind-the-wheel feel neither inspires spirited driving nor confidence. Optional sport packages tend to further compromise comfort with little return for the driver. New for this year, the lineup gains a new Q70L long-wheelbase model that greatly increases rear legroom. Considering that the standard Q70's rear seats are already quite accommodating, this new model seems a bit unnecessary. With a lack of available rear-seat amenities found in other long-wheelbase luxury cars, the Q70L's existence is downright puzzling here in the United States. Further compounding matters is the strong competition from competing luxury sedans. We recommend checking out the venerable BMW 5 Series and Mercedes-Benz E-Class, as well as the Audi A6, Cadillac CTS and Lexus GS before committing to a 2015 Infiniti Q70. We're confident that you'll find, just as we have, that the Q70 comes up short and is quickly falling out of fashion.

Performance & mpg

Powering the 2015 Infiniti Q70 3.7 is a 3.7-liter V6 that produces 330 horsepower and 270 pound-feet of torque. All Q70 models come with a seven-speed automatic transmission with manual shift control. Rear-wheel drive is standard, while all-wheel drive is available on non-hybrid models. In Edmunds testing, a Q70 with the V6 accelerated to 60 mph in 6.1 seconds, which is quick among rivals. The EPA estimates the Q70 3.7 will achieve 21 mpg combined (18 city/26 highway). The AWD model is rated at 20 mpg combined (18/24). The Q70 5.6 uses a 5.6-liter V8 that's good for 420 hp and 417 lb-ft of torque. The EPA estimates 19 mpg combined (16/24) fuel economy for the rear-drive and 18 mpg combined (16/23) for the AWD. It reaches 60 mph in 5.2 seconds, which is similar to other V8-powered sedans in its class. The Q70 Hybrid employs a 3.5-liter V6 that works in conjunction with an array of lithium-ion batteries that power a 50-kilowatt electric motor. Combined output comes to 360 hp and is estimated by the EPA at 31 mpg combined (29/34). It reaches 60 mph in 5.5 seconds.