New & Used Infiniti Q40: In Depth
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Infiniti's Q40 is a small sport sedan powered exclusively by a V-6 engine powering either the rear or (optionally) all wheels. The Q40 is basically a reincarnation of an older model that continues to be one of the most involving in its class. Really, only the name has changed.
Though the name sounds similar, the Q40 isn't a new version of Infiniti's dead-and-buried Q45 flagship. Instead, it's a rebadged version of the former G37 sedan, wearing a different nameplate and given an extension of a year or two past its original sell-by date. It comes in below the price of the Q50, which is technically the G37's replacement, offering the Infiniti badge at a slight discount.
A car with the same formula as the aging G37 sedan, however, isn't bad at all—provided you're not attached to the latest in-car technology. With a 328-horsepower, 3.7-liter V-6 and a quick-shifting seven-speed automatic transmission—very similar to what you'll find in the newer Q50—the Q40 is fundamentally quick and responsive. Excellent steering and firm suspension tuning bring great driver control, with dynamics and poise that truly make it one of the best-handling sport sedans at any price.
Despite its aging sheetmetal, the Q40 still holds up today. It helps that the design was slightly ahead of its time when it was introduced for 2007. The interior is a different story, however, looking very obviously a generation behind the rest of Infiniti's current lineup. The dated look is most obvious when you compare the Q40 to the newer Q50 sedan, the G37's pseudo successor.
The Q40 fits the bill as a driver's car, but some of its strengths on that count can also be weaknesses when it comes to comfort and refinement. Its small size is great on the road, but it results in a cramped cabin, especially in the rear. The taut suspension makes for superb handling but falls down when it comes to ride comfort—the Q40 can be stiff, even harsh on broken pavement, and road noise creeps in more than it does in many comparable sport sedans.
Standard features on the 2015 Infiniti Q40 include leather upholstery, eight-way power heated front seats, Shodo aluminum trim, electroluminescent gauges, the Intelligent Key system, a Bluetooth hands-free calling interface, and 17-inch alloy wheels. Major options on the Q40 include a Bose Studio on Wheels sound system, a rearview camera, and a hard-drive-based navigation system with voice recognition.
The Q40 may be bench-sitting for 2015, with a new, smaller model waiting in the wings. Or the Q40 badge might simply be fleeting. We'll update this page as soon as Infiniti gives us a better idea of why this model is being kept alive and for how long it will stick around. For now, it offers a tried and true sport sedan at a better price. It likely will be replaced by the Q30, a new model that will be based on Mercedes-Benz's MFA architecture—it underpins the CLA-Class four-door coupe and GLA-Class baby crossover. The new car will also share engines with Mercedes.