The Maserati GranTurismo I 4.2 i V8 32V (405 Hp) represents the initial and most recognizable iteration of the revived GranTurismo lineage, produced from 2007 to 2017. Positioned as the flagship coupe within Maserati’s portfolio, it aimed to recapture the spirit of the classic Gran Turismo cars of the 1950s and 60s, blending Italian styling with high-performance engineering. This model served as the foundation for subsequent variations, including the S, MC, and convertible versions. It was built on the Maserati M145 platform, a shortened version of the Dodge Chrysler LC platform, and represented a significant step for Maserati in terms of modern production techniques and market reach.
Technical Specifications
| Brand | Maserati |
| Model | GranTurismo |
| Generation | GranTurismo I |
| Type (Engine) | 4.2 i V8 32V (405 Hp) |
| Start of production | 2007 |
| End of production | 2017 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 21.58 l/100 km (10.9 US mpg, 13.1 UK mpg, 4.6 km/l) |
| Fuel consumption (economy) – extra urban | 10.02 l/100 km (23.5 US mpg, 28.2 UK mpg, 10 km/l) |
| Fuel consumption (economy) – combined | 14.31 l/100 km (16.4 US mpg, 19.7 UK mpg, 7 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.2 sec |
| Acceleration 0 – 62 mph | 5.2 sec |
| Acceleration 0 – 60 mph | 4.9 sec |
| Maximum speed | 285 km/h (177.09 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 4.6 kg/Hp, 215.4 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 244.7 Nm/tonne |
| Power | 405 Hp @ 7100 rpm |
| Power per litre | 95.4 Hp/l |
| Torque | 460 Nm @ 4750 rpm (339.28 lb.-ft. @ 4750 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M139P |
| Engine displacement | 4244 cm3 (258.98 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 92 mm (3.62 in.) |
| Piston Stroke | 79.8 mm (3.14 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Coolant | 13 l (13.74 US qt | 11.44 UK qt) |
| Kerb Weight | 1880 kg (4144.69 lbs.) |
| Trunk (boot) space – minimum | 260 l (9.18 cu. ft.) |
| Fuel tank capacity | 86 l (22.72 US gal | 18.92 UK gal) |
| Length | 4881 mm (192.17 in.) |
| Width | 1847 mm (72.72 in.) |
| Height | 1353 mm (53.27 in.) |
| Wheelbase | 2942 mm (115.83 in.) |
| Front track | 1585 mm (62.4 in.) |
| Rear (Back) track | 1560 mm (61.42 in.) |
| Minimum turning circle | 10.7 m (35.1 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic transmission |
| Front suspension | Double wishbone |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 245/40 R19; 285/35 R19 |
| Wheel rims size | 8.5J x 19; 10.5J x 19 |
Powertrain & Engine Architecture
At the heart of the GranTurismo I 4.2 i V8 lies the M139P engine, a 4.2-liter naturally aspirated V8. This engine, derived from a Ferrari/Maserati collaboration, features a 90-degree V-angle, four valves per cylinder, and a double overhead camshaft (DOHC) valvetrain. The engine utilizes a multi-port fuel injection system, delivering fuel directly into the intake ports. Its 405 horsepower output at 7100 rpm and 460 Nm (339.28 lb-ft) of torque at 4750 rpm provided a robust and characterful driving experience. The engine’s architecture prioritized smooth power delivery and a distinctive exhaust note, hallmarks of the Maserati brand. Paired with the engine is a six-speed automatic transmission, designed to provide relatively quick and seamless gear changes. While not a dual-clutch transmission, it was tuned for a balance between comfort and performance.
Driving Characteristics
The 4.2-liter V8 with the automatic transmission delivered a grand touring experience focused on effortless power and refined comfort. Acceleration from 0-60 mph took approximately 4.9 seconds, and it could achieve a top speed of 177 mph. The automatic transmission, while not as sporty as a manual or a more modern dual-clutch unit, offered smooth shifts and made the GranTurismo accessible to a wider range of drivers. Compared to the later GranTurismo S models with their more powerful engines and sport-tuned suspensions, the 4.2 i felt more relaxed and focused on long-distance cruising. The gear ratios were optimized for highway driving, providing comfortable cruising at high speeds. The engine’s torque curve was broad, offering ample power for overtaking maneuvers.
Equipment & Trim Levels
The base GranTurismo I 4.2 i V8 came standard with a luxurious interior featuring leather upholstery, wood trim, and a comprehensive infotainment system. Standard features included automatic climate control, power-adjustable seats, and a premium audio system. Optional extras included a panoramic sunroof, upgraded leather options, and a more advanced navigation system. The exterior styling was classic Gran Turismo, with a long hood, sweeping lines, and a distinctive Maserati grille. While not overtly sporty in appearance, the GranTurismo I exuded an air of understated elegance.
Chassis & Braking
The GranTurismo I utilized a double wishbone suspension setup at both the front and rear, providing a comfortable ride and good handling characteristics. Ventilated disc brakes were fitted on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) was standard. The chassis was designed to balance rigidity with weight reduction, contributing to the car’s overall handling performance. The rear track was slightly narrower than the front, contributing to a more neutral handling balance.
Market Reception & Comparison
The GranTurismo I 4.2 i V8 was generally well-received by automotive critics. It was praised for its beautiful design, luxurious interior, and powerful engine. However, some critics noted that the automatic transmission wasn’t as engaging as a manual, and the fuel economy was relatively poor. Compared to the GranTurismo S, the 4.2 i offered a more comfortable and refined driving experience, but lacked the S model’s outright performance. The 4.2 i was positioned as the entry-level GranTurismo, appealing to buyers who prioritized luxury and comfort over track performance. Its fuel consumption, averaging around 16.4 US mpg combined, was typical for a high-performance V8 coupe of its era.
Legacy
The Maserati GranTurismo I 4.2 i V8 established a strong foundation for the modern GranTurismo line. The M139P engine proved to be a reliable and durable powerplant, and the car’s elegant design has stood the test of time. On the used car market, the 4.2 i remains a desirable option for those seeking a classic Italian grand tourer. While maintenance costs can be higher than more mainstream vehicles, the GranTurismo I offers a unique blend of style, performance, and luxury that continues to appeal to enthusiasts. Regular maintenance, particularly regarding the engine’s oil changes and cooling system, is crucial for long-term reliability.
