Structural reinforcement required by safety regulations for open-top vehicles means that the Spider inevitably weighs slightly more than the Alfa Romeo 4C coupé, but thanks to the use of carbon fibre for the rollover bars, spoilers and windscreen frame, as well as the adoption of a lightweight canvas soft top and the replacement of the glass rear screen with a continuation of the SMC* bodywork, the 4C’s structural rigidity, mechanical purity and low weight philosophy are not compromised. As a result, the additional weight of the open-top transformation has been limited to approximately 60kg.
The purposeful stance and stunning form of the Alfa Romeo 4C Spider has been evolved to ensure the highest levels of aerodynamic efficiency and downforce, resulting in impressive high-speed stability, while at the same time minimising the open-top air turbulence in the passenger compartment.
Apart from allowing the driver to connect even more closely with their surroundings, bestowing the Spider treatment on the Alfa Romeo 4C also allows the world to get a better view of what is a truly special and unique interior. Carbon fibre dominates the cabin, but not as a decorative afterthought - the monocoque of the 4C Spider Design Preview is constructed entirely from this distinctive material and is clearly visible in the centre console, door sills and rear bulkhead, for example.
The Alfa Romeo 4C Spider Design Preview also debuts a new dual-stage central exhaust system with titanium and carbon tailpipes by Akrapovic®, a company which produces competition exhaust systems for numerous motorcycle classes including Moto GP, Superbike, Supersport, Motocross and Enduro. A key feature of the new exhaust is an electrically-operated valve system which can improve performance and enhance the exhaust note at the push of a wirelessly-linked button.
Powered by Alfa Romeo’s new four-cylinder, all-aluminium, 1750 Turbo Petrol engine, which drives the rear wheels via a six-speed, dual dry-clutch Alfa TCT transmission, the 4C Spider’s performance is all but identical to that of the hardtop Alfa Romeo 4C: 0 to 62mph takes just 4.5 seconds and top speed is in excess of 155mph. In addition, the outstanding deceleration and lateral acceleration performance, and the balanced 40:60 front-to-rear weight distribution, remain unaffected by the evolution from coupé to Spider.
Complementing its show-stopping presence, new carbon fibre clamshell headlights have been fitted to the Alfa Romeo 4C Spider Design Preview, as have new alloy wheels which have been milled from solid aluminium blocks and shod with bespoke Pirelli tyres. Finished in three-layer gloss white, which helps emphasise the car’s beautifully sculpted shape and masterfully resolved surfaces, the Alfa Romeo 4C Spider Design Preview is undoubtedly the highlight of the 2014 Geneva Motor Show.
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