The Mondial chassis features detachable sub-frames holding major mechanical assemblies, including one at the rear supporting the engine/transmission/rear suspension assembly, to simplify engine service compared to previous V8 Ferraris. A forward-hinged lid covers a front compartment accommodating the spare tyre, radiators and cooling fans, battery (ahead of a wheel arch), heating and cooling systems electric control systems. At the rear, a full-width, insulated and trimmed luggage boot with a gas-strut-supported lid sits behind the engine bay. Electrically actuated pop-up headlights contain twin round lamps in each for all 8, QV and 3.2 models, and a single homofocal rectangular unit each side of the Mondial t. U.S. market models feature rectangular side turn-indicator lamps, front and rear. Engine All Mondials are fitted with a V8 engine deriving from Ferrari's original V8 powerplant released in the 1974 Ferrari (Dino) 308 GT4, which in-turn was a two-cylinder extension of the V6 engine originally deployed in the Dino 206 GT of 1968. Mondial engines comprise a lightweight alloy V8 block with 90° bank-angle; shrink-fit cylinder liners; a five-bearing, flat-plane crankshaft with paired connecting rods on each journal; belt-driven, quad overhead camshafts (two per cylinder bank) acting directly on the valves; alloy crossflow cylinder heads; and a wet-sump lubrication system (excepting the Mondial t, which used a dry-sump system). Engine displacement started at for the Mondial 8 and QV models, increasing to for the Mondial 3.2, and culminating in for the Mondial t model. The orientation of the 3.4 V8 engine block is unique in Mondial t models. Mirroring the two-seater Ferrari V8 vehicles, all 3.0 and 3.2 L engines sit across the car with their crankshaft and cylinder planes transverse to the main vehicle axis. The 3.4 L engine in the Mondial t (and 348 GTB cousin) is rotated ninety degrees to a longitudinal orientation with respect to the car. In the Mondial 8 the V8 employs two valves-per-cylinder, and this increases to four valves-per-cylinder for the Quattrovalvole QV and all later models. All models feature a cast-alloy intake housing nestled centrally above the engine "vee" with manifold tubing running directly to each cylinder. Marelli electronic ignition is used on all vehicles with the exception of the Mondial t, and comprises twin coils, a separate distributor run off each bank of cylinders, and a common electronic control module. Again excepting the Mondial t, fuel metering is via Bosch K Jetronic continuous fuel injection with