2010 Maserati GranCabrio

September 16, 2009 at 9:56 am

2009 Frankfurt Motor Show is the place for Maserati to drop the curtains on its ultra hot drop-top version of the Gran Turismo. It’s called the GranCabrio and is a four-seater convertible with a folding soft-top. It will go on sale in Europe from Spring 2010.

The Gran Cabrio is powered by the same 4.7L V8 engine as in the coupe. This engine has 440 hp and 440-hp/361 lb-ft of torque which means this diva can accelerate form 0 to 60 in just 5.4 seconds and get you to the exciting borders of 176 mph! This level of performance puts it in the same category with Mercedes SL63 and Porsche Carrera Cabrio, and while it might not be as powerful as the Merc or as drivable as the Porsche, it has the looks of a supermodel, and that’s the winning card for it.

2010 Maserati GranCabrio Maserati Grancabroi 1

Technical specifications

Body
High-strength steel bearing monocoque with box-section panels and structure constructed in sheet galvanized, two-door cabriolet, four seats, longitudinal centre-front engine (between the two axles), rear wheel drive.

Cx 0.35 with car closed and 0.39 with car open.

Monocoque
Multi-material bearing monocoque, passive safety performance conforming to “worldwide” regulations, integration of various design technologies for weight/performance optimization: steel structural part, aluminum bonnet and bumper front reinforcement cross member, boot lid in thermosetting composite material.

Frame
Derived from the Quattroporte structure, with reduced wheelbase and rear overhang, designed to satisfy the most stringent American crash standards (FMVSS208, Federal Motor Vehicle Safety Standard), front structure compliant with ACEA1 “pedestrian impact” standards.
Constructed in high-strength steel boxed sections; it integrates a tubular structure in the rear part to support suspensions and differential; front serves to support the suspensions and engine.
Aluminum sub-floor structural reinforcements.

Suspension
Standard Skyhook system.
Front: quadrilateral with forged aluminum hub carriers and struts, basic aluminum gas dampers with continuous damping variation and acceleration sensors on each wheel (Skyhook), coaxial helical springs.
Rear: with quadrilaterals with forged aluminum hub carriers and struts, additional radius bar for toe-in control; basic aluminum dampers with continuous damping variation and acceleration sensors on each wheel (Skyhook).
Front and rear suspension fitted with hollow bars that reduce roll and mass, and increase driving comfort.

2010 Maserati GranCabrio Maserati Grancabroi 2

Steering
Hydraulic steering box with tacho-sensitive servo assistance with on road steering ratio 64 mm/rev.
Steering diameter (from pavement to pavement): 10.7 m.

Transmission
Architecture with front transmission in unit with the engine, drive shaft, rear differential. 6-speed hydraulic torque converter gearbox (ZF 6HP26).

Transmission gear ratios: 1st gear 4,171; 2nd gear 2,340; 3rd gear 1,521; 4th gear 1,143; 5th gear 0,867; 6th gear 0,691; R 3,403.
Asymmetric limited slip differential (25% in traction, 45% in release) with bevel drive with final ratio 3.73 (15/56).

Steel drive shaft, 69 mm diameter, articulated in two pieces with three constant-velocity joints, and supported at the centre with a bearing which is integral with a support cross member tightened to the chassis, with an interposed rubber ring.

Traction control and Maserati Stability Program (MSP) incorporating the traction control (ASR), release torque (MSR), anti-lock braking (ABS), and electronic brake distribution (EBD) systems.

Engine
8 cylinders in 90 degree V, total displacement 4,691 cm3. Crankcase and cylinder heads in hardened and tempered aluminum alloy, crankshaft in hardened and tempered steel, balanced individually on 5 main bearings.
The timing system features double chain-driven overhead camshaft per bank; four valves per cylinder driven by hydraulic cups.

Continuous phase variator on intake camshafts.
Increased-diameter Nikasil-coated thin steel cylinder liners.
Wet sump lubrication, oil sump integral with crankcase, single oil bath pump.
Bosch integrated ignition and injection systems, and drive-by-wire accelerator.

Displacement: 4,691 cm3
Bore: 94 mm
Stroke: 84.5 mm
Compression ratio: 11.25:1
Maximum power output: 323 kW (440 CV)
Engine speed at maximum power output: 7,000 rpm
Peak torque: 490 Nm (50 kgm)
Engine speed at peak torque: 4,750 rpm
Maximum engine speed: 7,200 rpm

Dimensions and weight
Length: 4,881 mm
Width (without mirrors): 1,915 mm
Width (with mirrors): 2,056 mm
Height: 1,353 mm
Wheelbase: 2,942 mm
Front track: 1,586 mm
Rear track: 1,590 mm
Front overhang: 873 mm
Rear overhang: 1,066 mm
Trunk capacity: 173 l
Fuel tank capacity: 75 l
Dry weight (UE version): 1,887 kg
Kerb weight (UE version): 1,980 kg
Weight distribution: 49% front; 51% rear with car closed;
48% front; 52% rear with car open

Performance
Top speed: 283 km/h with car closed
Acceleration 0-100 km/h: 5,4 s
Pick-up 80 -120 km/h: 4.2 s
Stopping distance from 100 Km/h – 0: 35 m

Further Readings:

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