The Infiniti Q70, particularly the facelifted version introduced for the 2014 model year and continuing through 2018, represented Infiniti’s offering in the mid-size luxury sedan segment. This iteration of the Q70, a successor to the M series, aimed to blend performance, comfort, and technology. The 3.7-liter V6 engine paired with a seven-speed automatic transmission was a core component of the Q70 lineup, positioned as a strong contender offering a balance between the base 3.7-liter and the more powerful, long-wheelbase Q70L models. It served as a popular choice for buyers seeking a refined driving experience without the added cost of the extended wheelbase or the complexity of hybrid powertrains.
Technical Specifications
| Brand | Infiniti |
| Model | Q70 |
| Generation | Q70 (facelift 2014) |
| Type (Engine) | 3.7 V6 (320 Hp) Automatic |
| Start of production | 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 15.8 l/100 km (14.9 US mpg, 17.9 UK mpg, 6.3 km/l) |
| Fuel consumption (extra urban) | 7.9 l/100 km (29.8 US mpg, 35.8 UK mpg, 12.7 km/l) |
| Fuel consumption (combined) | 10.8 l/100 km (21.8 US mpg, 26.2 UK mpg, 9.3 km/l) |
| CO2 emissions | 249 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.2 sec |
| Acceleration 0 – 62 mph | 6.2 sec |
| Acceleration 0 – 60 mph | 5.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5.5 kg/Hp, 182.8 Hp/tonne |
| Weight-to-torque ratio | 4.9 kg/Nm, 205.6 Nm/tonne |
| Power | 320 Hp @ 7000 rpm |
| Power per litre | 86.6 Hp/l |
| Torque | 360 Nm @ 5200 rpm (265.52 lb.-ft. @ 5200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | VQ37VHR |
| Engine displacement | 3696 cm3 (225.54 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 95.5 mm (3.76 in.) |
| Piston Stroke | 86 mm (3.39 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC, VVEL |
| Engine oil capacity | 4.9 l (5.18 US qt | 4.31 UK qt) |
| Kerb Weight | 1751 kg (3860.29 lbs.) |
| Max. weight | 2310 kg (5092.68 lbs.) |
| Max load | 559 kg (1232.38 lbs.) |
| Trunk (boot) space | 500 l (17.66 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Permitted trailer load (braked) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Length | 4980 mm (196.06 in.) |
| Width | 1845 mm (72.64 in.) |
| Width (with mirrors) | 2096 mm (82.52 in.) |
| Height | 1493 mm (58.78 in.) |
| Wheelbase | 2900 mm (114.17 in.) |
| Front track | 1575 mm (62.01 in.) |
| Rear track | 1570 mm (61.81 in.) |
| Drag coefficient (Cd) | 0.28 |
| Turning circle | 11.4 m (37.4 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission |
| Front suspension | Double wishbone, Independent coil spring, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 355 mm |
| Rear brakes | Ventilated discs, 350 mm |
INTRODUCTION
The 2014-2018 Infiniti Q70 3.7 V6 Automatic represented a significant update to Infiniti’s mid-size luxury sedan. Built on the Nissan FM platform (often referred to as the 1HX0/A3 platform), the Q70 aimed to deliver a compelling blend of performance, luxury, and technology. The 3.7-liter V6 engine and seven-speed automatic transmission combination was positioned as the mainstream offering in the Q70 range, appealing to buyers who desired a balance between performance and fuel efficiency. It sat below the long-wheelbase Q70L, which prioritized rear passenger space, and above any potential base engine options (which were not widely offered in the US market).
Powertrain & Engine Architecture
At the heart of the Q70 3.7 was the VQ37VHR 3.7-liter V6 engine. This engine, a member of Nissan’s highly regarded VQ engine family, is a naturally aspirated, 60-degree V6. The “VHR” designation stands for “Variable Valve Event and Lift,” indicating the engine’s advanced valvetrain technology. This system allows for continuously variable control of valve timing and lift, optimizing engine performance across a wide range of engine speeds. Fuel delivery was handled by a multi-port fuel injection system. The engine produced 320 horsepower at 7000 rpm and 265 lb-ft of torque at 5200 rpm. The engine’s longitudinal mounting and rear-wheel-drive configuration contributed to a balanced driving experience. The seven-speed automatic transmission, sourced from Jatco, featured adaptive shift control, adjusting shift points based on driving conditions and driver input.
Driving Characteristics
The Q70 3.7 V6 Automatic offered a smooth and refined driving experience. While not as overtly sporty as some of its European rivals, the Q70 provided ample power for everyday driving and confident highway passing. The seven-speed automatic transmission contributed to responsive acceleration, although it wasn’t as quick-shifting as some dual-clutch transmissions found in competing models. The gear ratios were tuned for a balance of acceleration and fuel economy. Compared to a manual transmission-equipped Q70 (which was rare), the automatic offered greater convenience and ease of use, but at the expense of some driver engagement. Compared to the Q70L, the standard wheelbase model felt more agile and responsive due to its lighter weight and shorter wheelbase.
Equipment & Trim Levels
The Q70 3.7 typically came well-equipped with standard features including leather upholstery, power-adjustable front seats, a rearview camera, and a premium audio system. Higher trim levels added features such as a navigation system, heated and ventilated front seats, a power-adjustable steering column, and advanced safety technologies like lane departure warning and blind-spot monitoring. Interior color options typically included shades of black, gray, and wheat. Optional extras included a Bose premium audio system, a dual-screen infotainment system, and various appearance packages.
Chassis & Braking
The Q70 featured a double-wishbone front suspension and an independent multi-link rear suspension, providing a comfortable and controlled ride. Stabilizer bars were fitted to both axles to reduce body roll during cornering. The Q70 3.7 was equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The front brakes measured 355mm in diameter, while the rear brakes were slightly smaller at 350mm. Anti-lock braking system (ABS) was standard, along with electronic brake-force distribution and brake assist.
Market Reception & Comparison
The Infiniti Q70 3.7 V6 Automatic was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and strong engine performance. However, some critics noted that its styling was becoming dated compared to newer competitors. Fuel economy was considered average for the segment. Compared to rivals like the BMW 5 Series and Mercedes-Benz E-Class, the Q70 offered a more affordable price point but lacked the same level of brand prestige and cutting-edge technology. Against the Acura TLX and Lexus GS, the Q70 offered a similar level of luxury and performance, but with a more distinctive styling approach.
Legacy
The Infiniti Q70, while discontinued after 2018, remains a viable option in the used car market. The VQ37VHR engine is known for its reliability and durability, provided it receives regular maintenance. Common issues include oil consumption and potential for timing chain wear at very high mileage. The seven-speed automatic transmission is generally reliable, but fluid changes are crucial for long-term health. The Q70’s relatively simple design and robust powertrain make it a relatively affordable and dependable luxury sedan for buyers seeking a comfortable and well-equipped vehicle.
