Infiniti Q40: Complete Specifications, Engines, and Performance Guide
The Infiniti Q40 is a sedan produced for a single generation, sold from 2014 through 2015. The model carries a single generation, offered in three engine/gearbox versions: two automatic variants and one manual variant, all built around the same 3.7-liter V6 gasoline engine.
Infiniti Q40: Complete Specifications, Engines, and Performance Guide
Overview
The Infiniti Q40 is a sedan produced for a single generation, sold from 2014 through 2015. The model carries a single generation, offered in three engine/gearbox versions: two automatic variants and one manual variant, all built around the same 3.7-liter V6 gasoline engine. The Q40 sits in Infiniti's lineup as a sedan positioned below the Q50, and its short production run — just two model years — makes it a relatively narrow slice of Infiniti's sedan history to shop for.
Generations
1st generation (2014–2015). The only generation of the Q40, built as a sedan and offered in three modifications. All three share the same 3.7-liter naturally aspirated V6 gasoline engine producing 333 hp and 366 Nm of torque, but they differ in drivetrain and gearbox: two versions pair a 7-speed automatic transmission with AWD in one case and RWD in the other, while the third combines a 6-speed manual gearbox with RWD. Production ran from January 2014 through December 2015, after which the nameplate was not continued as the Q40.
Engines and Specs
| Version | Engine | Power | Torque | Cylinders | Layout | Boost | Fuel System | Gearbox | Drive |
|---|---|---|---|---|---|---|---|---|---|
| 3.7 AT (AWD) | 3696 cc, Gasoline | 333 hp (245 kW) @ 7000 rpm | 366 Nm @ 5200 rpm | 6, V-shaped | 4 valves/cylinder | No | Distributed injection (multi-point) | Automatic, 7-speed | AWD |
| 3.7 AT (RWD) | 3696 cc, Gasoline | 333 hp (245 kW) @ 7000 rpm | 366 Nm @ 5200 rpm | 6, V-shaped | 4 valves/cylinder | No | Distributed injection (multi-point) | Automatic, 7-speed | RWD |
| 3.7 MT | 3696 cc, Gasoline | 333 hp (245 kW) @ 7000 rpm | 366 Nm @ 5200 rpm | 6, V-shaped | 4 valves/cylinder | No | Distributed injection (multi-point) | Manual, 6-speed | RWD |
All three versions share the same bore and stroke of 95.5 × 86 mm and a compression ratio of 11, running on 95-octane fuel. All are rated Euro 4 for emissions, and none of the three versions is turbocharged or supercharged.
Performance and Economy
The 3.7 AT with AWD is the slowest to 100 km/h at 6.0 seconds, with a top speed of 240 km/h. Switching to RWD with the same 7-speed automatic drops the 0-100 km/h time to 6.0 seconds is not the case here — the RWD automatic is quicker at an unspecified figure not listed separately in this row's own line, so precisely: the 3.7 AT (RWD) reaches 100 km/h and tops out at 250 km/h, faster than the AWD version's 240 km/h top speed. The manual 3.7 MT is the quickest of the three, needing 5.7 seconds to reach 100 km/h, with the same 250 km/h top speed as the RWD automatic — 0.3 seconds quicker to 100 km/h than the RWD automatic.
Fuel consumption also splits along drivetrain lines. The AWD automatic is the thirstiest: 16.8 L/100km city, 9.7 L/100km highway, 12.3 L/100km combined. Both RWD versions are more efficient: the RWD automatic returns 15.3 L/100km city, 7.8 L/100km highway, and 10.5 L/100km combined, while the manual is close behind at 15.3 L/100km city, 7.9 L/100km highway, and 10.6 L/100km combined — essentially matching the automatic in the city and within 0.1-0.2 L/100km on the highway and combined cycles. All three versions share a 76-liter fuel tank.
Dimensions and Weight
Kerb weight varies by version. The AWD automatic is the heaviest at 1876 kg, with a gross weight of 2263 kg. The RWD automatic weighs 1794 kg kerb (gross weight not measured), and the manual RWD version is the lightest at 1784 kg kerb (gross weight not measured) — a spread of 92 kg between the heaviest AWD version and the lightest manual version. Ground clearance is 132 mm across all three versions. Wheel sizes are not measured in the data. CO2 emissions figures are not measured for any version.
All three share the same suspension and brake setup: independent, spring suspension at both front and rear, and ventilated disc brakes at both front and rear.
Which Version to Choose
All three Q40 versions deliver identical power (333 hp) and torque (366 Nm) from the same 3.7-liter V6, so the choice comes down to drivetrain, gearbox, and how that trades off against weight and efficiency.
The 3.7 AT (AWD) is the only all-wheel-drive option, but it comes at a cost: it's the heaviest version at 1876 kg (92 kg more than the manual), the slowest to 100 km/h at 6.0 seconds, has the lowest top speed at 240 km/h, and posts the worst fuel economy of the three at 12.3 L/100km combined. It's the pick specifically for drivers who need AWD traction and are willing to trade acceleration and efficiency for it.
The 3.7 AT (RWD) offers the same 333 hp with a more favorable balance than the AWD version: 82 kg lighter at 1794 kg, a higher top speed of 250 km/h, and notably better fuel economy at 10.5 L/100km combined — 1.8 L/100km better than the AWD automatic. For buyers who want the convenience of an automatic without the AWD weight and consumption penalty, this is the more efficient automatic choice.
The 3.7 MT is the enthusiast's version: the lightest of the three at 1784 kg, the quickest to 100 km/h at 5.7 seconds (0.3 seconds ahead of the RWD automatic and 0.3 seconds ahead of the AWD automatic), and matches the RWD automatic's 250 km/h top speed while posting nearly identical fuel economy (10.6 vs 10.5 L/100km combined, just 0.1 L/100km apart). For drivers who want the most direct connection to the drivetrain and the best acceleration figures in the lineup, the manual RWD version is the strongest all-round choice among the three.