Aston Martin Valhalla Spider revealed as brand's fastest open-top car with 350km/h roof-off top speed

Aston Martin opens the Valhalla

Aston Martin has revealed the Valhalla Spider, an open-top version of the mid-engined plug-in hybrid Valhalla Coupe introduced earlier in 2026. Announced by the manufacturer on 28 October from Gaydon, the Spider is described by the company as its first mid-engined open-cockpit production supercar and its fastest open-cockpit Aston Martin ever made. Unlike the Coupe, which is limited to 999 units, Aston Martin has not yet detailed how many Spiders it will build, as CarExpert notes. ¹²

The Spider makes its public debut at the 2026 Concours at Wynn Las Vegas, running from 29 October to 1 November, ahead of the SEMA show. Customer deliveries are scheduled to begin in the third quarter of 2027. Whether the model will be offered in Australia has not been established in the available announcements. ¹³⁶

Powertrain carried over from the Coupe

The Spider uses the same plug-in hybrid system as the Coupe: a 4.0-litre twin-turbo flat-plane-crank V8 producing 609kW (828PS/868Nm) driving the rear wheels through an eight-speed dual-clutch transmission with an integrated third electric motor, plus two front motors with electric torque vectoring, all supplied by a 6.1kWh high-performance battery. Combined system output is 793kW and 1,100Nm. Aston Martin says the V8's 207hp-per-litre specific output is the highest of any combustion engine it has developed, according to its press release. ¹²⁵⁶

A notable packaging detail reported by Autocar India: the eight-speed dual-clutch automatic has no reverse gear, with that function handled by the front electric motors. With no mechanical connection between the front and rear axles, Aston Martin's Integrated Vehicle Dynamics Control system manages drive to each wheel, working with four modes: Sport, Sport+, Race and EV. In Race mode the active rear wing can also act as an air brake, and rises 255mm, according to Autocar India. ³²⁶

Aston Martin claims a 0-100km/h time of 2.5 seconds and an electronically limited top speed of 350km/h, both matching the Coupe's figures, though the acceleration time is described by the manufacturer as predicted rather than independently verified. The car can also travel up to 14km in electric-only mode at speeds of up to 140km/h, per TimesLIVE's coverage of the announcement. Car&bike characterises the car as a limited-run model and notes it replaces the V12 Valkyrie Spider as the brand's fastest open-top supercar at 350km/h versus that car's 330km/h with the roof off. ¹⁴⁶

Roof system and open-top compromises

The roof architecture is the Spider's defining change. A removable black fabric roof is standard in most markets, limiting top speed to 200km/h when fitted; according to Autocar India, in the US the carbon-fibre hard-top instead comes as standard fitment. The optional hard-top allows the full 350km/h with the roof in place. A rain cover is supplied for static use. Crucially, the car can also achieve its 350km/h Vmax with the roof removed, which underpins Aston Martin's claim of the fastest open-cockpit production car it has built. ²³⁵⁶

Managing airflow with the roof off required specific engineering. A wind deflector clips into place when the roof panel is removed, directing cooling air down to the engine's intake snorkel — reprofiled for the Spider and sitting 35mm taller than on the Coupe — while lifting air over the occupants. When the roof is fitted, the deflector folds into three parts and stores in new 15-litre sill stowage apertures. The deflector must be manually installed by the driver, CarExpert notes. ¹²⁶

Active aerodynamics and Electronic Stability Programme calibrations have been revised to adapt to roof-on and roof-off airflow conditions, with Aston Martin claiming maximum downforce in excess of 600kg with the roof fitted. The carbon-fibre dihedral doors carry over from the Coupe but adopt a frameless design with refined kinematics for smoother operation, and the door glass has a slightly more curved top edge to ease entry and exit with the roof up. ²³⁶

Chassis, structure and cabin

The Spider sits on a version of the Coupe's bespoke carbon-fibre tub designed and engineered by Aston Martin Performance Technologies, the consulting arm of the Aston Martin Aramco Formula 1 team, using resin transfer moulding and F1-derived autoclave technology. This is paired with aluminium subframes, a pushrod double-wishbone front suspension and adaptive Bilstein DTX dampers. Carbon-ceramic brakes are standard, with six-piston calipers and 410mm discs up front and four-piston calipers with 390mm discs at the rear. ²³⁵⁶

Dimensions reported by Autocar India are 4,728mm long, 2,208mm wide including mirrors, 1,233mm tall, with a 2,760mm wheelbase, riding on 20-inch forged wheels at the front and 21-inch at the rear on bespoke Michelin Pilot Sport S 5 tyres. The company lists a dry weight of 1,680kg with lightweight options fitted. Personalisation ranges from tinted carbon-fibre finishes to ten liveries, five of which are exclusive to the hard-top version. ³

Inside, a new carbon-fibre Touring Seat is standard, intended to improve comfort and ease of entry and exit with the roof fitted; buyers preferring more dynamic support can specify the Coupe's original carbon-fibre seat at no extra cost. The cabin features dual 10.25-inch displays with Apple CarPlay, a digital rearview mirror, and an optional Bowers & Wilkins audio system. Safety equipment includes autonomous emergency braking, adaptive cruise control with stop-and-go, lane-keeping assist and driver monitoring, per Autocar India. ³

Performance and market context

Aston Martin chief executive Adrian Hallmark said in the company's announcement that the Coupe broke new ground as the brand's first production mid-engined supercar, first plug-in hybrid, and first to use its bespoke flat-plane-crank V8 and new eight-speed dual-clutch transmission, and that the Spider preserves its dynamic bandwidth while adding open-cockpit enjoyment. Continued collaboration with AMPT on dynamics, aerodynamics and materials informed the open-top variant's development. ²

Aston Martin says the technical variance between Spider and Coupe is deliberately limited to the active aerodynamics and stability control calibrations, preserving the shared hardware and software base. First deliveries remain on track for the third quarter of 2027, with production volumes and pricing — including for any Australian allocation — not yet confirmed by the manufacturer. ²⁶