The Aston Martin Vanquish Zagato family is just getting bigger and bigger. Joining the coupé and Volante roadster bodystyles are the Speedster and Shooting Brake, announced at the Monterey Car Week in California – where the Volante is also making its world premiere.

Why is there a Speedster when there’s already the Volante, you might ask? Well, for one there’s absolutely no roof on this one, so it’s a strict fair-weather friend. Sitting where a fabric roof would normally be stowed away are twin flying buttresses that flow from the seats, representing the Milanese coachbuilder’s signature double-bubble roof design.

The more intriguing Shooting Brake model has yet to be unveiled in full, but a side view render shows an elongated, low-slung glasshouse that flows towards the back of the car, ending with a raked rear windscreen. The roof will again feature the double-bubble surfacing with glass panels, while the powered tailgate opens up to a “luxuriously trimmed” rear luggage area complete with tailored luggage. It’s still a two-seater, however.

Otherwise, the two cars are exactly the same as other Vanquish Zagato models, with shared design cues including the full-width front grille with three-dimensional “Z” motifs, deep side strakes, prominent rear haunches and Vulcan-esque LED tail light “blades.” Inside, they feature herringbone carbon fibre trim, anodised bronze rotary controls, “Z” motif quilting and optional fully-aniline leather upholstery.

As with their siblings, the Speedster and Shooting Brake are powered by Aston Martin’s venerable AM11 5.9 litre naturally-aspirated V12 from the Vanquish S, producing 600 PS. Drive is sent to the rear wheels via an eight-speed ZF automatic transmission, dubbed Touchtronic III.

The Speedster will be the most exclusive version to be sold to the public, with only 28 cars (all sold out, we’re afraid) to be built – compared to the 99-unit run proffered to the coupé, Volante and Shooting Brake. Deliveries of the two new variants will begin in 2018, rounding out a total production run of 325 cars.

GALLERY: Aston Martin Vanquish Zagato Speedster

GALLERY: Production Aston Martin Vanquish Zagato Volante