Engine bonnet cabrio Mansory Carbon for Lamborghini Aventador

Engine Bonnet Cabrio Mansory Carbon for Lamborghini Aventador

The Lamborghini Aventador LP 700-4 Roadster's engine bonnet — the rear lid that covers the naturally aspirated V12 — differs geometrically from the coupé's equivalent in the area immediately behind the greenhouse, where the Roadster's open-top roof system requires a revised rear edge profile and hinge geometry. Mansory's engine bonnet for the cabrio is engineered specifically for the Roadster's dimensional envelope, replacing the factory aluminium bonnet with an autoclave-cured 3K twill carbon component that is structurally and geometrically specific to the open-top configuration within the Mansory Carbon Fiber Body kit set for Lamborghini Aventador.

Construction & Materials

The Roadster's engine bonnet must accommodate the thermal environment immediately above the V12 while maintaining precise gap tolerance with the Roadster-specific rear body structure. Mansory's Roadster bonnet uses the same high-temperature resin system as the coupé bonnet — 150 °C continuous — but the Roadster-specific ply stack is optimised for the revised plan-view geometry and the different hinge geometry imposed by the Roadster's roof system.

• Outer face weave: 3K twill, book-matched symmetrically about the bonnet's centreline
• Internal structure: 2K plain biaxial reinforcement with UD carbon strips at hinge and striker mounting zones
• Cure: Autoclave full prepreg consolidation
• Resin system: high-temperature toughened epoxy, 150 °C continuous
• Wall thickness: 2.0 mm outer face, 3.0–3.5 mm at mounting flanges
• Finish: high-gloss UV-stable clear lacquer
• Mounting: OEM Roadster hinge positions, no modification required
• Weight: approximately 8.0 kg (vs. approximately 12.5 kg factory aluminium)
• Weight saving: approximately 4.5 kg at the car's highest-mounted major panel

The book-matched 3K twill specification is significant for the Roadster bonnet because its prominent horizontal face is the first surface fully visible when approaching the car from the rear quarter. Book-matching places the weave's symmetry axis at the bonnet's centreline, creating a mirror pattern where each side of the bonnet presents the twill at an equal and opposite diagonal — a visual symmetry that signals precision manufacturing and design intentionality rather than functional-parts pragmatism.

Design & Visual Function

The Roadster's engine bonnet occupies a larger proportion of the visual field in the three-quarter rear view than the coupé's equivalent, because the Roadster's open roof removes the greenhouse frame that partially occludes the bonnet area in the coupé view. This makes the Roadster bonnet's material quality and finish more visually prominent: the entire horizontal panel is uninterrupted by any structural element from the rear approach, presenting the 3K twill's book-matched surface as an unbroken carbon field from the rear screen surround to the spoiler mounting zone.

The weight reduction at the bonnet level has a measurable effect on the Roadster's polar moment of inertia about its vertical axis — a reduction in mass at a point well aft of the centre of mass reduces the car's rotational inertia, contributing to improved transient response in direction changes. For a Roadster used on mountain roads or circuit events, this effect is perceptible to experienced drivers and contributes to the car's handling balance complementing its engine output.

Compatibility & Fitment

This bonnet is designed specifically for the Lamborghini Aventador LP 700-4 Roadster (2013–2017) and LP 720-4 50° Anniversario Roadster. It is NOT compatible with the coupé — the Roadster's hinge geometry and rear-edge profile differ from the coupé in ways that prevent interchangeability. The coupé engine bonnet is a separate component in the Mansory programme. Aventador S (MY2017+) revised the rear body structure — confirm fitment for late-production Roadsters at order stage.

Installation & Reversibility

Installation involves removing the OEM aluminium bonnet at its hinge and striker positions, fitting the Mansory carbon bonnet in the same positions, and performing a gap and flush adjustment to the Roadster-specific rear body alignment. 90–120 minutes for a workshop familiar with the Aventador Roadster's rear structure. Full reversibility — the OEM bonnet reinstalls on the same hinge points. Panel gap alignment check with the rear screen surround and Roadster roof system is standard practice after bonnet replacement and should be performed as part of the installation process.

Pairing within the Mansory Aventador programme

The Roadster engine bonnet completes naturally with the roof cover cabrio and rear bridge to create a comprehensive carbon rear upper for the Roadster body style. Combining these Roadster-specific components with the shared-platform programme items — replacement air intake rear, air intake cover, and air intake middle part — creates a complete carbon rear quarter architecture for the open-top specification.

Maintenance & Durability

The engine bonnet's maintenance requirements are identical to the coupé version: pH-neutral cleaning, annual inspection of hinge bolt torque (the Roadster's rear lid is operated more frequently in open-top driving conditions, increasing hinge cycle count relative to a coupé), and ceramic coating for hydrophobicity. For Roadsters used in warm climates without a roof, the bonnet's horizontal face accumulates more environmental contamination (pollen, dust, bird deposits) than a coupé's equivalent — a ceramic coating applied at installation significantly reduces the frequency of required wash cycles to maintain the lacquer's optical clarity.

Lead Time & Warranty

Lead time from order is 3–4 weeks (Roadster-specific components have longer lead time than shared-platform items due to lower production volume). Mansory covers with a 12-month warranty against manufacturing defects including outer face delamination, lacquer voids, and hinge geometry deviation attributable to manufacturing error. Book-match symmetry deviation visible from normal viewing distances (greater than 1 mm centreline offset) is considered a manufacturing conformance issue.

The 4.5 kg weight saving at the Roadster bonnet's position — well aft of the axle midpoint and elevated above the V12's centre of mass — has a measurable effect on the Roadster's yaw inertia. Weight removed at the car's extremities reduces the polar moment of inertia about the vertical axis more effectively than the same mass removed from centreline positions. For a 1,575 kg Roadster, removing 4.5 kg at a position approximately 1.5 metres from the car's estimated yaw axis reduces the polar moment of inertia by approximately 10 kg·m² — a small but perceptible contribution to the car's transient response in direction changes at the limit. Drivers who have logged sector times before and after bonnet replacement on familiar circuits consistently report a slightly more eager rear-axle response in direction changes — a qualitative benefit that is difficult to separate from other setup variables but is consistently reported across independent assessments.

The Roadster's bonnet is also a component that benefits disproportionately from book-matched weave specification in the context of convertible ownership. Roadster owners experience their car from the cockpit with the roof stowed significantly more frequently than coupé owners — by definition, the Roadster is bought for open-air driving. This means the bonnet is the component that the driver and passenger see most directly from their seating position at speed. The book-matched 3K twill's bilateral symmetry is centred in the driver's forward field of view, creating a consistent visual reference that reinforces the programme's design intentionality every time the car is driven open-top. This driver-facing aspect of the bonnet specification is an underappreciated reason why Roadster owners often prioritise the bonnet earlier in their programme build than coupé owners who specify it as part of a complete rear upper package.

FAQ

Q: Is this bonnet interchangeable with the coupé version?
A: No. The Roadster's rear structure, hinge geometry, and rear-edge profile differ from the coupé. Fitting the coupé bonnet on a Roadster creates fitment gaps at the Roadster-specific rear body junction. Always order the Roadster (cabrio) version for an open-top car.

Q: Does the book-match weave require special alignment during installation?
A: The book-matched ply orientation is fixed at manufacturing — the centreline alignment is established in the mould and does not require adjustment during installation. The bonnet's centreline rib geometry provides a visual reference for confirming correct orientation during fitting.

Q: Does fitting this bonnet affect the factory rear spoiler mechanism?
A: The Roadster-specific bonnet is designed around the factory spoiler mounting positions. The rear spoiler's mounting geometry is preserved. Confirm at order stage if your car has a non-standard spoiler specification.

Q: Can the bonnet be supplied without the high-gloss lacquer for wrapping?
A: Yes — matte lacquer and unlacquered options are available to special order. Unlacquered bonnets for PPF or vinyl wrap application require a 4–5 week lead time. Enquire via the contact details below.

Order or ask technical questions via WhatsApp +44 7488 818 747 or [email protected].