The ‘Turbo Spezial’ is a homage to the one-off 935 Street from 1983

A company in Monaco has revealed a project that doffs its cap to one of the rarest Porsche 911s ever built, commissioned by a man who helped the McLaren Formula One team to enormous success in the 1980s.

Welcome then, to the ‘Turbo Spezial’: a modern 911 Turbo S wearing a suit that mirrors the one worn by the late, great Mansour Ojjeh’s breathtakingly rare and breathtakingly Eighties ‘935 Street’ from 1983.

Ojjeh’s car was in turn a one-off, designed to ape the dominant 935 racing car of the era. So, follow the money and this Turbo Spezial is a homage to a homage, and you don’t get more rare groove than that.

Or desirable. Because the 935 remains one of the coolest things Porsche has done, and Unofficial Machines’ Spezial is certainly a striking bit of kit. Designed by Alan Derosier, the reimagined body is constructed fully from carbon fibre and sits on the bones of a 992.1 Turbo S, featuring a completely redesigned front end, bonnet vents, and a deep, wide bumper and splitter.

There are flared arches, vents in front of the rear wheels, and a brand new rear section; a frame containing a single rear light bar and either a subtle, built-in ducktail spoiler or a more outlandish rear wing. Naturally, everything’s been designed to be as aero efficient – and grippy – as possible.

It’ll be punchier, too. A gentle reminder: a not-at-all regular 992.1 Turbo S, released only a few years ago, already gets a 640-odd horsepower twin-turbo flat-six, able to sprint to 62mph in 2.4s and right up to 200mph+. It is not a car that wants for pace.

So naturally UM has already upped the car’s ante to… Very Ante. The first Turbo Spezial’s engine kicks out 740-odd horsepower and 700lb ft of torque, which should feel rather sprightly indeed.

There’s a new suspension setup designed by KW, and each car will of course be tailored specifically to each individual buyer. UM is building 90 road-legal versions of the Turbo Spezial, and 10 track-only versions that’ll offer “optimal” performance (read: Very Very Ante) featuring equipment "inspired" by the GT3 RS for the chassis and interior. A gentle reminder: a 911 GT3 RS is not a car that wants for pace.

The carbon parts will be built in Torino, assembly will take place in the south of France, and it’ll be built ready for summer 2025. You’ll be able to spec a 992.1 Convertible, too, and plans are afoot to fit them over the 992.2 Turbo S.

Prices? Each one starts from €350,000, and six have already been accounted for. More as we have it.