Aston Martin Valhalla Spider unveiled as open-top 1,079bhp supercar

The open-top supercar gets a 4.0-litre twin-turbo V8 plug-in hybrid powertrain, revised active aerodynamics and a removable fabric roof, with deliveries scheduled to begin in Q3 2027.

Aston Martin has unveiled the Valhalla Spider, an open-top version of its mid-engined Valhalla supercar. The new model retains the Coupe's plug-in hybrid powertrain and performance credentials, while introducing a removable roof, revised aerodynamics and chassis calibrations tailored for roof-off driving. The Valhalla Spider is the British marque's first mid-engined open-cockpit production supercar and is claimed to be its fastest open-cockpit model yet.

The Valhalla Spider will make its global debut at the 2026 Concours at Wynn Las Vegas this weekend, with customer deliveries scheduled to commence in the third quarter of 2027.

Aston Martin Valhalla Spider: Powertrain and performance

Powering the Valhalla Spider is the same plug-in hybrid powertrain as the Valhalla Coupe, combining a bespoke 4.0-litre, twin-turbocharged V8 engine with three electric motors. The V8 produces 828bhp, while the electric motors contribute an additional 251bhp, taking the combined system output to 1,079bhp and 1,100Nm of torque.

The V8 features a flat-plane crankshaft and delivers a specific output of 207bhp per litre, which Aston Martin describes as the highest of any of its combustion engines. Power is transmitted through an eight-speed dual-clutch transmission (DCT).

Two electric motors power the front axle, enabling electric torque vectoring to improve agility and stability, while the third motor is integrated with the transmission to assist the V8 in driving the rear axle. With no mechanical connection between the front and rear axles, the system can independently manage torque delivery to the wheels through Aston Martin's Integrated Vehicle Dynamics Control system.

The Valhalla Spider has an electronically limited top speed of 350kmph, which Aston Martin says is achievable with the roof both on and off.

Roof system and aerodynamic changes

The Valhalla Spider comes standard with a removable, stowable black fabric roof. With this roof fitted, the car can reach speeds of up to 200kmph. Customers can also opt for a carbon fibre hardtop, which allows the supercar to reach its full 350kmph top speed with the roof in place.

For roof-off driving, Aston Martin has developed a dedicated wind deflector that manages airflow around the open cockpit. It directs cooling air towards the engine intake snorkel while helping lift airflow over the occupants to improve comfort. The snorkel has also been redesigned for the Spider and sits 35mm taller than the Coupe's version.

When not in use, the wind deflector folds into three sections and can be stored in newly added 15-litre sill storage compartments. A rain cover is also supplied for use when the car is stationary.

The Spider retains the Coupe's active aerodynamic hardware, which adjusts front and rear downforce according to driving conditions and selected drive modes. Revised active aerodynamics and Electronic Stability Programme (ESP) calibrations account for the differences in airflow between roof-on and roof-off configurations. Aston Martin claims the car can generate more than 600kg of downforce with the roof fitted.

Carbon fibre construction and revised seating

The Valhalla Spider is built around the same bespoke carbon fibre monocoque as the Coupe, developed with Aston Martin Performance Technologies (AMPT), the consulting arm of the Aston Martin Aramco Formula 1 team. The structure uses a combination of resin-transfer moulding and Formula 1-derived autoclave technology to deliver stiffness, strength and low weight.

The car retains its signature carbon fibre dihedral doors, with revised mechanisms for smoother operation and a frameless design. The upper edge of the door glass has also been reshaped slightly to improve entry and exit when the roof is fitted.

A new carbon fibre Touring Seat is standard on the Spider, offering improved comfort and easier ingress and egress. Buyers can also choose to retain the Coupe's original carbon fibre seat at no additional cost for greater support during dynamic driving.

With the Valhalla Spider, Aston Martin aims to retain the Coupe's road and track capabilities while adding the experience of open-air driving. The combination of a 1,079bhp plug-in hybrid powertrain, active aerodynamics and a removable roof positions the Spider as a performance-focused addition to the marque's mid-engined supercar line-up.