The Stradale's chassis was a space frame, similar to its rally counterpart, built out of CrMo steel tubes and aluminium alloy for the crash structures; it was covered by epoxy and fiberglass body panels. Like the rally car, the 1.8-litre four-cylinder engine was longitudinally mid-mounted, equipped with Weber-Marelli IAW integrated electronic ignition and fuel injection, a supercharger, a turbocharger and two intercoolers. In road tune the 1.8 produced at 6750 rpm and of torque at 4500 rpm. The "Stradale" kept a three differential four-wheel-drive system from the rally car; the centre differential sent 30% of the engine torque to the front open differential, and 70% to the rear limited slip.