Singer Vehicle Design All-Terrain Competition Study (ACS) History

Unveiled in January 2021, the All-Terrain Competition Study (ACS) was developed in collaboration with Tuthill Porsche, a UK firm renowned for building Porsche 911s for the Safari Rally and other off-road endurance events. The ACS combined the Classic Study's bespoke coachbuilt approach with a lifted ride height, strengthened suspension, underbody protection, and all-terrain tyres.

Power came from a twin-turbocharged 3.6-litre flat-six developing around 450 hp, and pricing was quoted above $1 million USD — reflecting the bespoke, motorsport-grade build. The programme attracted significant enthusiast attention but was removed from Singer's website in March 2021 following objections from Porsche AG over the marketing presentation; it is catalogued here as a 2021 programme rather than an ongoing offering.