1990 Porsche 911 Carrera 4 Leichtbau

1990 Porsche 911 Carrera 4 Leichtbau

A handful of specially prepared lightweight 911s were fabricated by the Porsche factory and called the Carrera 4 RS Lightweight. These employed the same six-cylinder 3600cc boxer engine as the 260hp “regular” RS, but produced some 40 more horsepower due to the exclusion of catalytic converters and mufflers.

The RS Lightweight earned its name thanks to the combined use of an aluminum front lid, aluminum doors, Plexiglas side windows and a fiberglass rear engine lid. Its overall weight was pared down to 1100kg thus making for an exceptional power to weight ratio.


The list of features included an aluminum safety cage, two Recaro race seats with five-point safety belts, sport steering wheel coupled to a power assisted steering rack and a type 953 Paris-Dakar transmission.

964019-Our feature car sold at Bonhams 2009 Exceptional Motorcars and Automobilia at Quail Lodge Resort for $139,000 inclusive of Buyer’s Premium.

In Detail

typeSeries Production Car
built atStuttgart, Germany
positionRear, Longitudinal
displacement3600 cc / 219.69 in³
power223.7 kw / 300 bhp
specific output83.33 bhp per litre
bhp/weight272.73 bhp per tonne
body / frameUnitary Steel Monocoque w/Aluminum Doors & Hood.
driven wheels4WD
curb weight1100 kg / 2425.5 lbs

Auction Sales History

1990 Porsche 911 Carrera 4 Leichtbau

1992 Porsche 964 Carrera 4 Lightweight Chassis no. 964 015 – sold for $133,500. Mike Amalfitano bought this car directly from Porsche in 1991 but then engaged in a long, spirited and ultimately successful contest with the EPA and DOT to import it, swearing it would be used only for competition events. Amalfitano and his lawyers submitted testimony from experts of the car’s unsuitability for use on public roads. Eventually they enlisted the support of New Hampshire Governor (now U.S. Senator) Judd Gregg to intercede with the authorities and attest to the good character and honesty of Mr. Amalfitano and his assurances that the Porsche would be used only in competition events and not on public roads. Auction Source: Bonhams 2010 Exceptional Motorcars and Automobilia

1990 Porsche 911 Carrera 4 Leichtbau

1990 Porsche Carrera 4RS Lightweight Chassis no. 964019 – sold for $139,000 This exemplary 1990 Carrera 4 RS Lightweight was purchased by the vendor in January 2003. A letter of documentation and a complete list of its specifications as produced by Porsche AG via Porsche Cars of Great Britain Limited are included. Offered on a Bill of Sale. Auction Source: 2009 Bonhams Exceptional Motorcars at Quail Lodge Resort