A 1993 Porsche 911 Type 964 Carrera RSR that has remained undriven for 24 years is to go to auction this May.

Once delivered, and with only 10 kilometres on the clock, this limited-production 911 vanished into a private collection, where it remained untouched, still covered with its factory-applied Cosmoline coating, never seeing the light of day again.

The exclusive Type 964 Carrera RSR, of which only 51 examples were built, was the Turbo-bodied racing version of the Carrera RS. It was fitted with a 3.8-litre type M64/04 RSR-specific engine. This dry-sumped, single-ignition powerplant developed 350 horsepower and 284 foot-pounds of torque, all fed through an uprated five-speed manual transaxle, for a reported 0–60 mph time of 3.7 seconds, quicker than a Ferrari F40.

This all-original example was special-ordered and delivered with numerous creature comforts (compared to the stripped down race cars). Specified with Polar Silver Metallic paint and trimmed in Can Can Red leather including the competition seats, headliner, upper and lower dashboard, steering column and steering wheel, door caps, and even the bolt-in roll cage.

The carpeting and six-point Schroth racing harnesses were colour-matched, while the silver-faced instruments were surrounded with silver-grey leather, as were the door pulls. The battery master switch mounted in the front boot compartment can be operated from the driver’s seat. The centres of the wide Speedline three-piece wheels were ordered in Amethyst Metallic, while the callipers for the huge disc brakes are painted a contrasting gold.

RM Sotheby's will be auctioning the 'as new' 964 at its Villa Erba sale on 27 May.