1995 Porsche 911 (993) CUP 3.8 RSR EVO


  • An exceptionally well-documented example of a genuine factory race car, upgraded to RSR Evo specification by Porsche Motorsports North America.
  • At the rear is a 3.8-liter naturally aspirated M64/70 RSR Sprint flat-six engine, equipped with a slide valve induction system and Porsche programmable EFI management, producing around 410hp; coupled to a six-speed G50 manual transmission and limited-slip differential.
  • This car has reportedly only ever been driven in club racing events and has never been crashed, meaning it remains highly original compared to many other 993 Cup cars.
  • It was featured in the April 1997 issue of Excellence magazine.


  • First owned by John Ruther, the owner of Northstar Motorsports in Illinois and a former regional president of the Porsche Club of America; this 993 Cup was the first 1995 3.8-liter model to be delivered to and remain within the US market. It was converted by Porsche from Carrera RS to SuperCup specification prior to delivery to Ruther.
  • Originally raced by Ruther in Porsche Club Amateur events, in 1996 he heard of the proposed developments for the 1997 Evolution version. Subsequently, the 993 Cup was upgraded to 1997 specification by Porsche Motorsports North America, incorporating an exceptionally rare M64/70 RSR Sprint type engine, built using Carillo con-rods and uprated camshafts, twin-plug ignition, and various titanium components. In this specification it produced around 390hp.
  • The 993 Cup was further upgraded with a very rare Teilert Engineering slide valve induction system in place of the butterfly valves, and a programmable Porsche EFI unit was installed to complement this. As a result, power was up to around 410hp.
  • Its mechanical specification was also enhanced with ‘Big Red’ brake callipers and 911 Turbo discs, carbon fiber brake cooling ducts, double adjustable dampers, power steering, and twin oil coolers. The transmission was upgraded to a G50 six-speed manual gearbox with a racing clutch, lightweight flywheel and limited-slip differential.
  • Fuelling is via a 100-liter Premier cell with a reserve baffle and twin fuel pumps, while the car also has a racing ABS system, aluminium hood, Speedline split-rim centre-lock wheels, factory air jacks, and a Crawford rear wing.
  • In the cabin, a full Matter roll cage is present, plus Recaro seats, Sabelt harnesses, a quick-release Porsche Momo steering wheel, and a GT2 fire suppression system.
  • All the upgrades to car were performed by Porsche Motorsports North America in Southern California, or by the renowned ANDIAL Racing. PMNA reportedly used this car to develop and test upgrades for 993 RSRs, and as such it features the full raft of upgrades that were available.
  • Accompanying the car are five binders full of documentation, including original paperwork, invoices and correspondence with Porsche executives relating to the vehicle.
  • The car was featured in the April 1997 issue of Porsche specialist magazine ‘Excellence’, and also appeared in Adrian Streathers’ book ‘The Essential 993’.


  • There are no known prior racing incidents. Indeed, this car is reported to have never been crashed. While Porsche intended only to sell Cup cars to those participating in the race series, this car only ever competed in club and amateur events.
  • The Grand Prix White paintwork is believed to be original, with the exception of the lower rear valance that was resprayed due to heat marks from the exhaust. The fender flares also had minor damage in the past and were repaired.
  • Inside, the two Porsche Recaro bucket seats are in great shape for their age, though there are a couple of small tears visible in the driver’s seat fabric, but no other obvious damage or significant wear.
  • There are no known electrical or mechanical faults.


This Porsche 993 Cup 3.8 RSR Evo is a fantastic example of the last air-cooled factory-built racers. It is also understood to be the only original 1995 Cup car upgraded to genuine 1997 RSR Evo specifications with the hallowed M64/70 flat-six motor. Having been further enhanced in period by PMNA to produce more power and deliver even sharper responses, this is a truly thrilling track toy. It also boasts outstanding documentation, and represents an unmissable opportunity for the discerning 911 collector.

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Car Overview

  • N/A
  • manual
  • LHD
  • White
  • Black
  • 3.8L
  • VINWP0ZZZ99ZSS398084

Lot Overview

  • Lot #06119
  • trade Sale
  • Boca Raton, FL, USA



Exterior  (79)

Interior  (33)

Mechanical  (42)

Documents  (8)

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