Driving the Porsche 911 Reimagined by Singer - ACS

Driving the Porsche 911 Reimagined by Singer - ACS

The Porsche 911 Reimagined by Singer All-terrain Competition Study (ACS) was undertaken by Singer, in partnership with renowned 911 rally specialist Richard Tuthill. The impetus came from a Singer client request for a modified air-cooled Porsche 911 that could compete in off-road racing and demonstrate extensive all-terrain exploration capabilities.

To highlight the broad repertoire of the ACS, the client commissioned two machines, one - in Singer’s iconic Parallax White - focused on high-speed desert rallying and a second – in Corsica Red - configured for high-speed, high-grip tarmac events and disciplines.

Porsche 911s prepared by UK-based off-road competition specialist Richard Tuthill have dominated rally events for decades. Tuthill's recent victory in the 2019 East African Safari Classic marked a fourth win in the grueling 3,000-mile event across Kenya and Tanzania. Such successes sit alongside deep expertise from the world of WRC competition and off-road racing events.

Modifications developed for the Porsche 911 Reimagined by Singer All-terrain Competition Study include:

• 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
• A twin-turbocharged, 3.6L, air-cooled flat-six with power starting at 450hp
• Sequential racing transmission with front, centre and rear limited-slip differentials

Summary Technical Specifications

• 1990 Type 964 Porsche 911
• Core strengthening to monocoque for heavy duty off-road use, carbon fiber body panels and off-road race modifications including:

Suspension, wheels and brakes:

• Specialised long-travel suspension with twin, 5-way adjustable dampers per corner (8 dampers total)
• Forged aluminium 8x16” wheels with BF Goodrich All-Terrain tyres
• 4-piston, monobloc steel disc brakes with hydraulic handbrake


• 3.6L twin turbo-charged, air-cooled, Porsche flat-six
• Water-to-air intercoolers, with individual-bank charge coolers housed within the plenum and cooled by clamshell-mounted radiator
• Tuned for the demands of each event, power starts at 450hp and 420lb ft torque


• 5-speed sequential dog-box enabling flat-shifting. Manual and paddle-shift capable
• Permanent AWD
• Front, centre and rear, mechanical, plated limited-slip differentials

Additional Specialised Equipment:

• Long-range fuel tank
• 2 x full-size spare race wheels and tires in front the 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 system

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