Aston Martin does not build many cars like the Aston Martin Cygnet with gasoline engine, made in small numbers.
Under the skin
Under the skin sits gasoline engine. Kerb weight is 988 kg. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
In context
Where it sits in Aston Martin's history is not in doubt: it was built at Gaydon. Nearby in the Aston Martin catalogue sit the Aston Martin Mark II and the Aston Martin V12 Vantage GT3.