The Mazda 6 II Sedan (GH) 2.5, produced between 2007 and 2010, represented a significant evolution in Mazda’s mid-size sedan offering. Positioned as a step up from the base 2.0-liter engine, the 2.5-liter variant aimed to provide a balance of performance and fuel efficiency within the broader GH generation, which spanned from 2008 to 2012 globally, with the 2007 model year marking the initial release in some markets. This model competed directly with established rivals like the Honda Accord, Toyota Camry, and Ford Fusion, offering a more driver-focused experience and distinctive styling. The 2.5-liter engine was a key component in Mazda’s strategy to appeal to buyers seeking a more engaging driving experience than traditionally offered in the family sedan segment.
Technical Specifications
| Brand | Mazda |
| Model | 6 |
| Generation | 6 II Sedan (GH) |
| Type (Engine) | 2.5 (170 Hp) |
| Start of production | 2007 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 11.1 l/100 km (21.2 US mpg) |
| Fuel consumption (extra urban) | 6.3 l/100 km (37.3 US mpg) |
| Fuel consumption (combined) | 8 l/100 km (29.4 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.1 sec |
| Acceleration 0 – 62 mph | 8.1 sec |
| Acceleration 0 – 60 mph | 7.7 sec |
| Maximum speed | 220 km/h (136.7 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 8.4 kg/Hp |
| Weight-to-torque ratio | 6.3 kg/Nm |
| Power | 170 Hp @ 6000 rpm |
| Torque | 226 Nm @ 4000 rpm (166.69 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | L5-VE |
| Engine displacement | 2488 cm3 (151.83 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 100 mm (3.94 in.) |
| Compression ratio | 9.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Kerb Weight | 1420 kg (3130.56 lbs.) |
| Max. weight | 1930 kg (4254.92 lbs.) |
| Max load | 510 kg (1124.36 lbs.) |
| Trunk (boot) space – minimum | 519 l (18.33 cu. ft.) |
| Fuel tank capacity | 64 l (16.91 US gal | 14.08 UK gal) |
| Length | 4735 mm (186.42 in.) |
| Width | 1795 mm (70.67 in.) |
| Height | 1440 mm (56.69 in.) |
| Wheelbase | 2725 mm (107.28 in.) |
| Front track | 1550 mm (61.02 in.) |
| Rear (Back) track | 1550 mm (61.02 in.) |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
Powertrain & Engine Architecture
The heart of the Mazda 6 2.5 was the L5-VE engine, a 2.5-liter inline-four cylinder powerplant. This engine utilized a cast iron block with an aluminum cylinder head, a common configuration for balancing durability and weight. The L5-VE featured multi-port fuel injection, delivering fuel directly into the intake ports, and a dual overhead camshaft (DOHC) valvetrain with four valves per cylinder. This configuration optimized airflow for improved performance. The engine’s 9.7:1 compression ratio was a compromise between efficiency and power output. The 6-speed manual transmission was standard, providing drivers with precise control over the engine’s powerband. While an automatic transmission was offered in some markets, the manual was favored by enthusiasts for its responsiveness.
Driving Characteristics
The 2.5-liter engine delivered a noticeable improvement in performance compared to the base 2.0-liter engine. The 170 horsepower and 166.69 lb-ft of torque provided brisk acceleration, with a 0-60 mph time of around 7.7 seconds. The manual transmission’s gear ratios were well-matched to the engine’s powerband, allowing for strong acceleration in each gear. While not a sports car, the Mazda 6 2.5 offered a more engaging driving experience than many of its competitors, thanks to its responsive engine and well-tuned chassis. The automatic transmission, when equipped, dulled the experience somewhat, with noticeable delays in shifting and a less direct connection to the engine.
Equipment & Trim Levels
The 2.5-liter engine was typically offered in the higher trim levels of the Mazda 6 II Sedan, such as the ‘i’ and ‘s’ trims. Standard features included air conditioning, power windows and locks, a CD player with auxiliary input, and alloy wheels. Higher trims added features like a sunroof, leather upholstery, a premium sound system, and automatic climate control. Optional extras included navigation systems and advanced safety features. The interior design was generally considered modern and well-appointed for its class, with a focus on ergonomics and driver comfort.
Chassis & Braking
The Mazda 6 II Sedan utilized a MacPherson strut front suspension and a multi-link rear suspension, providing a comfortable ride and responsive handling. The 2.5-liter models typically featured larger diameter brakes than the base models, with ventilated discs at all four corners. Anti-lock Braking System (ABS) was standard. The chassis was designed to minimize body roll and provide a stable platform for spirited driving. Stabilizer bars were fitted front and rear to further enhance handling.
Market Reception & Comparison
The Mazda 6 2.5 received generally positive reviews from automotive critics. It was praised for its stylish design, engaging driving dynamics, and well-equipped interior. Compared to the 2.0-liter model, the 2.5-liter offered a significant performance boost without a substantial penalty in fuel economy. However, some critics noted that the automatic transmission could detract from the driving experience. In terms of reliability, the L5-VE engine proved to be generally dependable, although routine maintenance was essential to prevent issues such as oil consumption. Fuel economy was competitive for its class, averaging around 29.4 US mpg in combined driving.
Legacy
The Mazda 6 II Sedan (GH) 2.5 remains a popular choice in the used car market, particularly among buyers seeking a reliable and engaging mid-size sedan. The L5-VE engine is known for its durability, and with proper maintenance, it can provide many years of trouble-free service. While not as common as some of its competitors, the Mazda 6 2.5 has developed a loyal following among enthusiasts who appreciate its blend of style, performance, and value. The GH generation Mazda 6 helped solidify Mazda’s reputation as a manufacturer of driver-focused vehicles, and the 2.5-liter engine played a key role in that success.
