The Q40, like the G37 Sedan that it used to be named, is a traditional rival to the BMW 3-Series sedans.
The current 3-Series has a fuel-efficient turbo four-cylinder engine family that really beats the Infiniti models for efficiency, though; and while its steering isn't ultimately up to the standards of the past its handling retains some of the expected sharpness.
A turbo six is also offered in the 335i models.
Otherwise, the Audi A4 is a top alternative, with its rear-biased Quattro all-wheel-drive system adding up to more driving enjoyment than you might expect; it has top-notch cabin appointments, it's a little tighter than the other models inside.
The Acura TLX replaces the TL and TSX, and it's a new rival with a sportier flavor; we haven't driven it yet, but it looks like an exciting (and probably more fuel-efficient) alternative.
The interior of the Lexus IS 350 is also quite cramped, with a design that looks more dated, and it doesn't feel quite as sporty overall as the G37.
The latest Lexus IS sport sedans also take a step in a more aggressive direction.
And finally, Infiniti's own Q50 sedans are an alternative to the Q40; with a Q50 Hybrid in the mix, as well as far better in-cabin refinement and infotainment systems, no matter which Q50 you choose.
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|2015 INFINITI Q40Browse Used Listings||2015 Acura TLXBrowse Used Listings||2015 Audi A4Browse Used Listings||2015 BMW 3-SeriesBrowse Used Listings||2015 INFINITI Q50Browse Used Listings||2015 Lexus ISBrowse Used Listings|
|18 MPG City / 27 MPG Hwy||21 MPG City / 35 MPG Hwy||17 MPG City / 32 MPG Hwy||17 MPG City / 45 MPG Hwy||19 MPG City / 36 MPG Hwy||19 MPG City / 30 MPG Hwy|
|Premium Unleaded V-6||Premium Unleaded I-4||Intercooled Turbo Premium Unleaded I-4||Intercooled Turbo Premium Unleaded I-4||Premium Unleaded V-6||Premium Unleaded V-6|
|Mid-Size Cars||Mid-Size Cars||Compact Cars||Compact Cars||Mid-Size Cars||Compact Cars|
|4-Door Sedan RWD||4-Door Sedan FWD||4-Door Sedan CVT FrontTrak 2.0T Premium||4-Door Sedan 320i RWD||4-Door Sedan RWD||4-Door Sport Sedan RWD|
|Rear Wheel Drive||Front Wheel Drive||Front Wheel Drive||Rear Wheel Drive||Rear Wheel Drive||Rear Wheel Drive|
|Automatic w/OD||Auto-Shift Manual w/OD||CVT w/OD||Automatic w/OD||Automatic w/OD||Automatic w/OD|
|Detailed Spec Comparison|
|2015 INFINITI Q40 vs. 2015 Acura TLX||2015 INFINITI Q40 vs. 2015 Audi A4||2015 INFINITI Q40 vs. 2015 BMW 3-Series||2015 INFINITI Q40 vs. 2015 INFINITI Q50||2015 INFINITI Q40 vs. 2015 Lexus IS|