Speaking of wheels, they're up from piddly 16s to meaty 19-inch rims, encasing beefy brakes and nearly bursting from the Cygnet's diminutive bodyshell.
The oft-maligned Cygnet has, since its debut, been something of an anachronism among Aston Martins.
'The V8 Cygnet shows the fun side of both Aston Martin and its customers, ' said Aston Martin vice president & special operations officer, David King.
The interior is a curious mix of Cygnet and Vantage GT3, with Aston Martin suggesting the vehicle could "easily be used for competition". Not a bad improvement over the 106 miles per hour top speed and 11 second 0-60 miles per hour time that the original car's 1.3-liter engine offered.
Based on the Toyota iQ, only 300 Cygnets were made in its two-year production run - with Aston Martin expecting to build 4,000 every year.
A roll cage was welded to a right-hand drive Cygnet's steel body shell and panels and a new front bulkhead and transmission tunnel were fabricated from sheet metal to accommodate the characterful 4.7-litre naturally aspirated V8 Vantage S powertrain. Even as rare as it now is, though, this V8 Cygnet is even rarer. It features subframes and a suspension derived from the previous-gen Vantage as well.
The manufacturer has built a one-off Cygnet through the Q by Aston Martin Commission for one of its customers which has a 4.7-litre, 430bhp V8 engine powering it. 2 seconds or less and top out somewhere around 170 miles per hour.
Nineteen-inch alloys house six-piston brake callipers up front, with four-piston units at the rear - with the wheels themselves wrapped in Bridgestone tyres.
From the outside, you'll notice this Cygnet has extra-large wheel arches because Aston Martin had to widen the front and rear tracks.
In the cabin, fixed back carbon-fibre Recaro bucket seats are found, complete with four-point harnesses. The alcantara covered steering wheel is removable and behind this sits a bespoke carbon dash with the familiar Vantage instrument cluster. It'll be showing off its stuff at the Goodwood Festival of Speed this weekend.
With 50/50 weight distribution and a 313 horsepower per tonne power-to-weight ratio, the V8 Cygnet tips the scales at just over 3,000 pounds wet and has a faster acceleration time than the V8 Vantage S from which it stole its engine.