The Singer All-terrain Competition Study or ‘ACS’ for short was the result of a collaboration between Singer Vehicle Design in California and renowned specialists Tuthill Porsche in the UK. Built at the request of one long-standing customer who wanted an air-cooled 911 that could "compete in off-road racing and demonstrate all-terrain exploration capabilities," the ACS was Singer's first toe in the water of competition cars, and as such was designed in partnership with historic 911 rally expert Richard Tuthill and built as his Oxfordshire base, in the United Kingdom.

The car is based on a Type 964 air-cooled Porsche 911 and was inspired by legendary rally cars including the 911 SC/RS and the Paris-Dakar 959s. Now available for sale for the first time, this represents a unique and potentially unrepeatable opportunity to acquire what is surely the ultimate off-road 911 built by two of the most experienced parties in the air-cooled 911 world. Contact us now for more information or to arrange a viewing.

Specification Highlights:

Off-road competition capability, conceived with events such as the Baja 1000 and Dakar Rally in mind, but suitable for a range of surfaces

Dramatically increased ride height, suspension travel and overall strength

Carbon fibre body panels suited to quick replacement and easy underbody access

Permanent AWD

Twin-turbocharged, 3.6L, air-cooled flat-six with power starting at 450hp

Sequential racing transmission with front, centre and rear limited-slip differentials

Core strengthening to monocoque for heavy duty off-road use, carbon fibre body panels

Specialised long-travel suspension with twin, 5-way adjustable dampers per corner

Forged aluminium 8x16" wheels with BF Goodrich All-Terrain tyres

4-piston monobloc steel disc brakes with hydraulic handbrake

5-speed sequential dog-box enabling flat-shifting. Manual and paddle-shift capable

Front, centre and rear, mechanical, plated limited-slip differentials

Long-range fuel tank

2 x full-size spare race wheels and tyres in front trunk area and rear storage area

Full FIA specification roll cage

Bespoke competition seats with FIA certification

Rehydration system for driver and navigator

State-of-the-art GPS race navigation