Designed in collaboration with the world’s foremost racing chassis designers, the Alfa Romeo 4C Spider is innovative at its very core. Supercar DNA runs throughout, including a carbon fiber monocoque chassis, mid-engine design and aluminum subframes. It begins with the solid foundation of a carbon fiber monocoque chassis. Laid by hand, this carbon fiber is three times stronger and seven times lighter than conventional steel. Front and rear aluminum subframes combine strength with weight-saving technologies. Sheet Molded Compound (SMC) is used for the outer body and is 20% lighter and more stable than steel — and also resists corrosion. The end result of these advanced technologies is incredible strength and remarkable weight efficiency — the overall curb weight is under 2,500 lb.