THE EXCLUSIVE TWO-SEATER BARCHETTA
A lightweight sports car
With the Sergio you enter the fascinating and exciting realm of the two-seater barchetta as a unique and extreme object. Sportsmanship in the truest sense of the joy of driving, the passion of those who view cars as an unequalled source of excitement, the pleasure of admiring the essentiality of a one-off car by Pininfarina. Overall, the Sergio offers real sports performance, with a shell of torsion stiffness which exceeds that of the original spider, thanks to the reduction in the size of the doors, and the reduction of the total mass of about 150 kg compared to the spider. This allows good handling and a further improvement of acceleration, estimated at below 3.4 seconds for 0-100 kph, at the top of its class.
Aerodynamics and speedy
Changes in the body with which the Pininfarina Style Centre has transformed the original car. A Ferrari 458 Spider, into a barchetta were supported by calculations and tests in the Grugliasco wind tunnel to optimise aerodynamic performance. In particular, a totally new body was produced, full carbon, saving about 10% in weight compared to the original body in aluminium, all to the benefit of acceleration and pick-up. Compared to the original car, 21” light alloy one-stud wheels were included, with a specific design, and a hub version derived from the 458 Challenge; new Led taillights, new specific headlamps inserted into the bumper; specific small doors, window-less and opening upward by 45 degrees; new dash top; modified seats, with new fixed head restraints, disconnected from the seat. The roof, windscreen and rear bench seat were removed.
- Maximum length: 4550 mm
- Maximum width: 1940 mm
- Maximum height: 1140 mm
- Boot capacity: 110 litres
- Power train (original Ferrari 458 Spider): 4499cc V8; Sequential gearbox 7M + RM
- Package: 2 doors, 2 seats
- Chassis: original 458 Spider
- Cx XS: about 5% lower than the original car
- Weight: about 1280 kg
- Maximum speed: approx 320 km/h
- Acceleration from 0 to 100: less than 3.4 seconds
An aerodynamic downforce studied in details
The aerodynamics have made it possible to achieve interesting results, starting with the creation of a virtual windscreen. The elimination of the windscreen would, in fact, involve a flow of air at increasing pressure as the car’s speed increases on the heads of the driver and passenger. The engineers and designers at Pininfarina have therefore designed, built and tested an airfoil placed in a recess on the front bonnet, which produces a double deflection of the air flow entering the passenger compartment.
The first deviation is from the wing itself, the second from the air that accelerates in the channel created between the airfoil and the corresponding shape of the recess in the trunk. The result is that, thanks to the virtual windscreen, the air passes above the heads of the driver and the passenger, greatly increasing comfort. This aerodynamic effect also contributes to increase the down force on the car’s front axle. The virtual windscreen is effective at speeds as low as 50 kph. The loss of aerodynamic load on the front axle, due to the elimination of the windscreen, has been recovered from a wing inserted in the front bumper.
The shape and dimensions of the wing are calculated so as to give the required load at the various speeds and, at the same time, allow correct flow of air to the radiators of the cooling system, set centrally at the front. To improve the protection of the occupants a roll-bar with a fixed spoiler increases the down force on the rear axle. The attention to detail goes so far as the central rear-view mirror, whose form has been aerodynamically optimised to link up with the air flow of the virtual windscreen. The engine’s air intake is channelled from the air inlets in the two sides. The air vents at the base of the roll-bar convey the cooling air to the oil coolers.