4.7 litre V8 engine – Page 2

Italian "Belcanto"

The engine is the beating heart of any Alfa Romeo. In this case it takes the form of a brand new 90° V 8 cylinder unit with a cylinder capacity of 4691 cc that was designed with one aim in mind: to ensure extraordinary performance while still offering a smooth drive and being usable in all circumstances, from the track to city traffic.

The top engine performance figures may be summarised as a maximum power output of 450 bhp at 7000 rpm, a peak torque of 470 Nm at 4750 rpm and a top speed of 7500 rpm.

The layout of internal fluid movements and the cylinder head cooling system is designed to achieve high duct permeability and effective intake load cooling to maximise volumetric efficiency and engine performance.

Harmonisation of the intake and exhaust geometry together with the introduction of continuous variable valve timing on the intake camshafts and optimisation of the combustion chamber and engine calibration means that 80% of torque is available from 2000 rpm.

In sporty driving conditions over mixed routes, the power unit offers impressively short response times due to the high permeability of the intake duct and the low inertia of the flywheel-twin plate clutch system.

A crankshaft with counterweights at 90°, fully balanced through careful selection of connecting rods and pistons, ensures the engine runs with low vibration levels.

The engine block and base assembly is in aluminium with 5 main bearings to ensure the structure is very rigid with little loss due to friction. The cylinder heads are also in aluminium alloy.

All the ducts (water, oil, secondary air) are cast directly into the engine to produce a system with great rigidity, low dimensions and guarantees of safe installation, i.e. great reliability.

Casting accessory systems into the main engine casting and the use of very rigid, thick-walled components ensures that little noise radiates from the engine and the components are very reliable.

Longitudinal engine packaging has also received particular attention, as evidenced by the introduction of a single chain timing system that guarantees exceptional lifetime dependability.

Special attention has also been devoted to the acoustic definition and tuning of the intake and exhaust in the quest for a sound timbre that enhances the car’s character and makes it unmistakable. The result is a full, distinctive sound, emphasised by the permeable intake system and an exhaust system with electronically controlled valves that enhance the car’s sound without infringing any type-approval or environmental constraints.

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Transmission

Robotised Gearbox and self-locking differential

The engineers used a layout familiar from other Alfa Romeo cars on the 8C Competizione: the transaxle architecture with gearbox at the rear that is an acknowledged asset of Alfa Romeo cars. This layout allows outstanding dynamic performance while also offering the active safety for which Alfa Romeo cars are fabled.

The engine-gearbox unit is designed in accordance with a transaxle configuration that ensures the weight distribution is very effective for vehicle handling. Due to the small axial engine size and the integration with frame components from the drawing board, the entire power unit can be housed well back to ensure the required sporty configuration.

The 6–speed gearbox with computerised speed selection by means of levers behind the steering wheel is designed to ensure ultra-slick gear shifts and may be used in Manual-Normal; Manual-Sport; Automatic-Normal; Automatic-Sport and Ice modes. The self-locking differential allows acceleration and stability to be managed with extraordinary efficiency in all situations.

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Engineering

Suspension, Wheels and breaking system

In the very best Alfa Romeo tradition, the engineering is directly derived from the race track. The suspension on the new model is no exception, with a double wishbone layout, forged aluminium axle carrier and arms and extra strut for toe-in control.

The braking system offers perforated, ventilated discs with aluminium brake callipers to ensure prompt, effective braking even with heavy use. To ensure the car stays glued to the road, it is fitted with 20” tyres specially developed to ensure outstanding performance: 245/35 at the front and 285/35 at the rear, fitted on perforated rims in fluid moulded aluminium to ensure lightness and maximum brake ventilation efficiency.

To ensure the car is entertaining and safe in any driving condition, the 8C Competizione comes with the latest Alfa Romeo VDC, an advanced stability and traction control system to ensure the driver feels at one with his car.

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Structure

Rigid and light

A rigid, light structure is the rule when configuring a good high performance car.

This is also the guiding principle behind the 8C Competizione. In detail, the compact frame is in steel to achieve the greatest torsional rigidity to ensure an accurate, safe drive at all times while the body is in carbon fibre. This choice was motivated by the need to minimise weights while also optimising the car’s centre of gravity for better agility and handling on demanding routes.

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Interiors

Personality and technology

The car’s distinctive look comes from extensive use of composite materials on the facia and interior panels. This is a technical choice but also reinforces the car’s spirit and emphasises its personality.

The same thinking lies behind the adoption of anatomical seats made out of carbon fibre that can be adjusted and customised on the basis of the driver’s physical characteristics (a facility previously reserved for racing cars).

Everything is designed and produced to ensure the greatest user-friendliness for the driver and whoever is lucky enough to share the thrill: relaxed driving position, intuitive instruments that are always visible, robotised gear levers secured to the steering column and easy to reach without removing your hands from the sporty steering wheel.

The carefully-crafted and detailed finish naturally allows the car to be customised to the driver’s taste and a choice of different interior environments is available.

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