Singer’s 373kW air-cooled Porsche 964 911 is complete

This 1990 Porsche 964 911 may well be the ultimate in air-cooled, naturally aspirated performance.

It’s been given the magic touch of both Singer Vehicle Design, a world renowned Porsche workshop based in California, and Williams Advanced Engineering which bestowed some F1-derived know-how upon the 911.

The 911’s original air-cooled engine still has pride of place in the rear of the car, but with a few tweaks.

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While it’s still air-cooled and atmo, it’s been bored out to 4.0-litres, and now has four valves per cylinder, four cam-shafts, and aluminium throttle bodies.

Cylinders and pistons link with titanium con-rods, the air box is made of carbon-fibre, and the exhaust system is one of titanium.

This work comes thanks to Porsche engineer Hans Mezger, who had a part in designing and maintaining the engine when it was being developed.

Now it is worth 373kW, and revs to over 9000rpm.

Thanks to a quick video, we know exactly how it sounds. Feast your ears:

The client who commissioned the work of automotive art, Scott Blattner, already owned the car, and asked Singer to essentially build the ultimate version of the 964 911.

“The guys at Singer have always been receptive to the question “What if?” So, the question became…what if Singer worked on restoring and modifying my beloved 27-year old Porsche 964, with the assistance of an engineering concern born from the world of F1. How would such a car look and how would it perform?”

With a kerb weight of just 990kg, Michelin Pilot Sport Cup 2 tyres keeping it stuck to the road, a lightweight Hewland 6-speed manual and obviously 373kW from a revvy atmo flat six, we imagine it’d be as close to driving nirvana as it gets.

As a result of this project, Singer will build specialised Porsches in conjunction with Williams for “more than 75 enthusiasts.”

We hope one of them lands on Aussie soil.