The Infiniti G25 Sedan, specifically the G25x variant with the 2.5-liter V6 engine and all-wheel drive automatic transmission, was a short-lived but notable entry in the luxury sport sedan segment. Produced from September 2011 to April 2013 as part of the V36 generation’s facelift, it aimed to offer a more accessible price point within the G-series lineup while still delivering a premium driving experience. The G25x occupied the entry-level position, slotting below the more powerful G37 models. It represented Infiniti’s attempt to broaden the appeal of the G sedan to a wider range of buyers, particularly those prioritizing fuel efficiency and all-weather capability over outright performance.
Technical Specifications
| Brand | Infiniti |
| Model | G |
| Generation | G25 Sedan (V36, facelift 2011) |
| Type (Engine) | G25x 2.5 V6 (218 Hp) AWD Automatic |
| Start of production | September, 2011 |
| End of production | April, 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 12.4 l/100 km (19 US mpg) |
| Fuel consumption (extra urban) | 8.7 l/100 km (27 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Emission standard | LEV2 |
| Weight-to-power ratio | 7.8 kg/Hp |
| Weight-to-torque ratio | 6.7 kg/Nm |
| Power | 218 Hp @ 6400 rpm |
| Torque | 254 Nm @ 4800 rpm (187.34 lb.-ft. @ 4800 rpm) |
| Maximum engine speed | 7500 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | VQ25VHR |
| Engine displacement | 2498 cm3 (152.44 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 85 mm (3.35 in.) |
| Piston Stroke | 73.3 mm (2.89 in.) |
| Compression ratio | 10.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 4.9 l (5.18 US qt | 4.31 UK qt) |
| Coolant capacity | 8.8 l (9.3 US qt | 7.74 UK qt) |
| Kerb Weight | 1699 kg (3745.65 lbs.) |
| Max. weight | 2175 kg (4795.05 lbs.) |
| Max load | 476 kg (1049.4 lbs.) |
| Trunk (boot) space | 382 l (13.49 cu. ft.) |
| Fuel tank capacity | 76 l (20.08 US gal | 16.72 UK gal) |
| Length | 4773 mm (187.91 in.) |
| Width | 1773 mm (69.8 in.) |
| Height | 1468 mm (57.8 in.) |
| Wheelbase | 2850 mm (112.2 in.) |
| Front track | 1519 mm (59.8 in.) |
| Rear track | 1529 mm (60.2 in.) |
| Ride height | 124 mm (4.88 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle | 11 m (36.09 ft.) |
| Drivetrain | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | Automatic transmission |
| Front suspension | Double wishbone, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs, 320.04×27.94 mm |
| Rear brakes | Ventilated discs, 307.34×15.24 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/55 R17 95V |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
The heart of the G25x is the VQ25VHR 2.5-liter V6 engine. This engine is part of Nissan’s highly regarded VQ engine family, known for its smoothness and reliability. The “VHR” designation signifies Variable Valve Timing and lift control, enhancing both power and efficiency. The engine utilizes multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain. It produces 218 horsepower at 6400 rpm and 254 Nm (187.34 lb-ft) of torque at 4800 rpm. The engine is longitudinally mounted in the front of the vehicle. Paired with the VQ25VHR is a seven-speed automatic transmission. This transmission was chosen for its smooth shifting characteristics and contribution to improved fuel economy compared to a manual transmission. The transmission is electronically controlled, adapting shift points based on driving conditions.
Driving Characteristics
The G25x, with its 218 hp and automatic transmission, offered a comfortable and refined driving experience. Acceleration was adequate for everyday driving, but it wasn’t as brisk as the G37 models. The seven-speed automatic transmission provided smooth gear changes, but some drivers found it to be somewhat hesitant during quick acceleration. The all-wheel-drive system provided enhanced traction in inclement weather, making it a practical choice for regions with snow or rain. The gear ratios were tuned for fuel efficiency and comfort rather than outright performance. Compared to the six-speed manual transmission available on some G25 models, the automatic prioritized ease of use over driver engagement.
Equipment & Trim Levels
The G25x typically came standard with features such as leather upholstery, a power-adjustable driver’s seat, dual-zone automatic climate control, a premium audio system, and Bluetooth connectivity. Optional extras included a navigation system, a sunroof, and upgraded interior trim. The interior design was generally consistent with other V36-generation G sedans, featuring a driver-focused layout and high-quality materials. The standard dashboard configuration included analog gauges with a central information display. Exterior features included alloy wheels, automatic headlights, and a rear spoiler.
Chassis & Braking
The G25x utilized a double wishbone suspension in the front and an independent multi-link suspension in the rear, providing a comfortable ride and responsive handling. Stabilizer bars were included at both ends to reduce body roll during cornering. The braking system consisted of ventilated discs on all four wheels, providing ample stopping power. The G25x was equipped with an Anti-lock Braking System (ABS) as standard. Due to the lower weight compared to the G37, the G25x’s suspension components were often slightly less robust, but still provided a well-balanced driving experience.
Market Reception & Comparison
The Infiniti G25x received mixed reviews. Critics praised its comfortable ride, refined interior, and standard all-wheel drive. However, some found the engine to be underpowered compared to the G37, and the automatic transmission lacked the responsiveness of the manual option. Fuel economy was generally considered good for its class, achieving around 19 mpg in the city and 27 mpg on the highway. Compared to the G37, the G25x offered a lower price point but sacrificed performance. Compared to other entry-level luxury sedans, such as the Acura TL and Lexus ES, the G25x offered a more sporty driving experience but potentially lower long-term reliability.
Legacy
The Infiniti G25x was a relatively short-lived model, discontinued after only two model years. However, it remains a popular choice among used car buyers seeking a comfortable and reliable luxury sedan with all-wheel drive. The VQ25VHR engine is known for its durability, and with proper maintenance, it can provide many years of trouble-free service. The seven-speed automatic transmission is also generally reliable, although some owners have reported minor issues with shifting smoothness. Today, the G25x represents an affordable entry point into the Infiniti brand, offering a blend of luxury, performance, and practicality.
