La cartella del modello 964 1993 (galleria a sx a scorrimento automatico) commercializzata in USA. I modelli descritti includono, oltre le C2/4 Coupe' e Cabrio, la versione "RS America", un surrogato della RS "RoW" che non poteva essere commercializzata oltre oceano e che quindi fu ricavata alleggerendo la C2 "normale" ed adottando un alettone posteriore fisso e la versione "America Roadster", una "serie limitata" che commemorava i 40 anni dall'introduzione dell'omonima 356.

1993 Porsche 911

Porsche's benchmark 911 model has been in continuous production since the end of 1964. From that time through the present day, the Porsche 911 has been the classic 2+2 sports car. It is the production-based car that forged much of Porsche's racing heritage, a heritage which continues to this day.

911: State of the art

Since those early cars, the overall appearance and the basic concept of the 911 have remained, but almost every component has been changed, improved, and evolved. As a result, nearly three decades after the shape was first seen by the public, the 911 is still considered a leader in sports car performance.

The 911 series underwent a major redesign for the 1989 model year, when the all-wheeldrive Porsche 911 Carrera 4 was introduced on a completely re-engineered platform. The present platform first appeared in experimental form in 1984, and served as the basis for the Porsche 959.

1993 911 lineup

For the 1993 model year, the 911 is available in four distinct variations:

• 911 Carrera 2
• 911 Carrera 4
• 911 America Roadster
• 911 RS America

The 911 Carrera 2 forms the basis of Porsche's line of rear-engined sports cars, and offers high performance in a variety of body styles and with manual or automatic transmissions. The 911 Carrera 4 offers drivers the added attraction of surefooted all-wheel-drive.

Body and transmission choices

The 911 America Roadster provides a unique Cabriolet body style reminiscent of the 911 Turbo, with a fully power-operated convertible top and an extensive choice of luxury and convenience options.

The 911 RS America makes available a lower priced 911 with the emphasis on performance and handling through its pure sport suspension, lighter weight, and limited option selection.

The Carrera 2 and 4 are available as Coupe, Cabriolet and Targa. The RS America is only available as a Coupe, and the America Roadster only as a Cabriolet. Porsche's unique Tiptronic transmission is optional on the Carrera 2 and America Roadster.

The 1993 911 model line benefits from several evolutionary changes:

• CFC-free air conditioning
• recycling labels for plastic containers
• new brake fluid with greater resistance to fading
• modified stereo speaker system

CARRERA 3.6 LITER ENGINE

Legendary flat-6 engine

The heart of any sports car is its engine , and the flat - six powerplant of the 911 family has become an integral part of the legend . From humble beginnings of only 1991 cc ( 121.5 cubic inches ) and 130 DIN horsepower in 1964 , the 911 engine has gone through many changes in displacement , power , material , and detail design . In 1993 , it remains a high performance , state - of - the - art unit with 247 horsepower ( SAE ) and a displacement of 3600 cc ( 220 cubic inches ) .

Race proven design

The 3.6 liter engine was introduced on the Carrera 4 for the 1989 model year . The engine consists of a pressure - cast aluminum crankcase housing a forged steel crankshaft .

Forged pistons and connecting rods

The connecting rods are made of forged steel , and the pistons are of forged aluminum , concepts proven on the race track for nearly three decades . The aluminum alloy cylinder heads incorporate hemispherical combustion chambers and utilize two spark plugs per cylinder . The twin plugs grew out of Porsche's experience on the race track as well as feedback from high performance aircraft engines that were in turn based on the roadgoing 911 engine . Twin plugs allow the best of both worlds - higher power output as well as cleaner combustion , with less tendency to knock . The exhaust ports are ceramic - lined to lower engine cylinder head temperatures and increase the effectiveness of the catalytic converter . Each cylinder head contains a single chain - driven overhead cam , which actuates the valves through solid lifters .

Resonance induction for better torque

Air enters the engine through a resonance induction system , which assures optimum cylinder filling across a broad range of engine loads and speeds , and provides a wide , usable torque band .

The Porsche 911 engine is air cooled by a belt - driven fan . The 911 has always used a dry sump lubrication system , common on race cars but seldom seen on road cars because of its complexity and cost . Two principal advantages of dry sump systems are that they are less sensitive to high cornering forces , which might cause lubrication problems with conventional oil pan systems , and they keep a large quantity of oil ( in this case more than 12 quarts ) in circulation to help cool the engine .

PERFORMANCE

The engineering features of the 911 series give this time - honored design performance that few rivals can match . With the five - speed manual transmission , the Carrera 2 accelerates to 60 mph in 5.5 seconds , and can reach a top test track speed of 162 mph . The Tiptronic equipped Carrera 2 can reach 60 mph in 6.4 seconds , and a top speed of 159 mph . The America Roadster achieves the same acceleration figures as the Carrera 2 ( 0-60 in 5.5 seconds , or 6.4 seconds with Tiptronic ) , and top track speeds are 158 and 156 mph respectively . Performance of the Carrera 4 is identical to the Carrera 2 with manual transmission . Thanks to its lighter weight , the RS America will accelerate to 60 mph in only 5.4 seconds , and can reach a top track speed of 162 mph .

TIPTRONIC

The Carrera 2 and America Roadster are available with a five - speed manual transmission or Porsche's unique four - speed Tiptronic automatic transmission . The Tiptronic is the most sophisticated automatic transmission presently available in the automobile industry .

Like so many of Porsche's key engineering features , the Tiptronic owes its existence in part to experience on the race track . In the mid 1980s , Porsche experimented with a unique semiautomatic transmission , the PDK , in several Porsche 962 Group C race cars .

The Tiptronic offers Porsche drivers an even wider choice of driving styles : the transmission can be left in " Drive " like a conventional automatic , or the driver can move the lever to a special gate and manually go up and down through the gears by " tipping " the lever forward or backward .

The Tiptronic features electro - hydraulic control , a lockup torque converter ( in the upper three gears ) and feedback to the engine control system for smooth shifts . Input parameters include throttle position , throttle opening or closing speed , engine rpm , vehicle speed , lateral and straight - line acceleration .

The most intelligent automatic transmission available

Even in its full automatic mode , the Tiptronic displays capabilities unmatched by any other automatic transmission on the market today . It can virtually sense the driver's needs , avoiding unwanted up- or downshifts which detract from sporty driving with conventional automatics . This is made possible by five distinct shift programs ranging from sport to economy ( other automatic transmissions offer two or at best three driver - selected shift modes ) , additional sensors , and adaptive logic in its control unit . There is no separate switch to select a shift mode ; the system actively determines which of the five available shift maps to use . The control unit senses how the car is being driven and responds accordingly .

If the shift lever is moved straight over to the right from its " Drive " position , the transmission goes into its manual mode ; the Tiptronic shifts up on driver demand or automatically when engine speed reaches the optimum point on the torque curve , whichever occurs first . Conversely , if the driver requests a downshift that would result in over - revving , the Tiptronic defers the shift until speed has decreased appropriately .

Tiptronic advantages

The Tiptronic gives away only a small performance margin to the Carrera 2 with a five - speed manual , but offers in return greater comfort in congested driving conditions while still enabling the traditional sports car enjoyment of going through the gears . Because it is less dependent on individual drivers ' styles with clutch and shift lever , Tiptronic lends itself to an effective exhaust emissions reduction strategy and allows better control of fuel consumption and noise emissions .

SUSPENSION

Like the 3.6 liter engine , the present 911 suspension was introduced in 1989 on the Carrera 4. At the front , the suspension consists of MacPherson struts with gas - filled shocks , forged aluminum lower A - arms , and a stabilizer bar . At the rear , toe - correcting semi - trailing arms are controlled by gas - filled struts and a stabilizer bar . This system , with its coil springs over shock absorbers front and rear , replaces the torsion bar springing which had been a 911 trademark since the car's birth .

Power-assisted rack & pinion steering

The steering is a rack and pinion unit , with force - sensitive hydraulic assist ( the RS America steering is unassisted ) . This system and the new suspension design keep road irregularities and bumps from kicking back through the steering column , yet allow the driver to sense the cornering forces and interact with the car - part of the essence of sports car driving .

BRAKES

The brakes of Porsche's 911 family are measurably among the best in the world . The brakes of the 911 Carrera 2 , Carrera 4 and RS America consist of vented discs front and rear , 298 mm ( 11.73 inches ) at the front , 299 mm ( 11.77 in . ) at the rear . The 911 America Roadster uses larger 322 mm ( 12.68 in . ) front brakes derived from the 911 Turbo . On all models , four piston calipers are used front and rear . Anti - lock braking ( ABS ) is standard on all models .

SPECIAL OPTIONS AND EUROPEAN DELIVERY

Special-order options available for all Porsche

Porsche owners who would like to further personalize their cars can take advantage of Porsche's special options . Porsche offers a wide range of special order items to make each car uniquely individual . These include paintwork to match any sample color and leather to duplicate any sample shade . Virtually every interior item may be ordered with factory - applied leather trim .

Every Porsche may be ordered through U.S. dealers for European delivery . The European delivery program offers an unforgettable driving experience , in one's own personal car on the high - speed motorways and scenic , winding secondary roads from which Porsche's legendary road - going sports cars are bred .

PORSCHE , SPORTS CARS AND THE ENVIRONMENT

Porsche is not only a leader in high technology and high performance , but is also an industry leader in environmental responsibility . This begins with building cars to last . Of all the Porsches built since 1948 , it is estimated that fully 80 percent are still in service .

A pioneer in corrosion protection

Part of that longevity comes from the fully galvanized bodywork of the Porsche 911. Porsche pioneered the use of two - sided galvanized body panels in 1976. Since then , experience has shown the effectiveness of the fully galvanized bodywork and other rust preventive measures . Porsche can now warranty every new Porsche for ten years against rust perforation . The solidity of the bodywork has been a factor in maintaining Porsche's traditionally high resale values .

Efficient recycling

If and when a Porsche reaches the end of its useful life and is recycled , labeling of various plastic components will make it easier to reprocess the parts . Labeling will help to put plastics back into consumer products , not in landfills .

Performance with less pollution

Despite their high performance , Porsche cars are among the cleanest on the road . Highly effective three - way catalytic converters , oxygen sensors , and engine management systems have long been a part of the Porsche pedigree . All Porsche models are equipped with systems that fulfill the most stringent exhaust standards worldwide .

Engine encapsulation for reduced noise

Porsche also limits noise emissions from the 911. Although enthusiasts enjoy the sound of a Porsche engine , not everyone may be so inclined . The 911 incorporates partial engine encapsulation which fulfills even the strict Swiss drive - by noise regulations .

New ozone-friendly HFC-134a refrigerant

Growing concern about the possible effects of chlorofluorocarbons , including the CFC - 12 refrigerants used in automotive air conditioning systems , on the earth's ozone layer , has led Porsche to introduce a CFC - free refrigerant , HFC - 134a , on all of its 1993 models . The entire air conditioning system had to be redesigned to use the new refrigerant . The higher cost of HFC - 134a , and its higher salvage value , also provide a monetary recycling incentive for repair shops .

PASSIVE SAFETY

The agility , precise handling and high power of Porsche sports cars places them among the world's best cars in terms of active safety . Passive safety is also a prime consideration at Porsche . In 1990 , Porsche was the world's first auto manufacturer to equip every car sold in the United States with driver and front passenger airbags as standard equipment .

WARRANTY

Thanks to decades of experience building solid , durable high - performance cars , Porsche's warranty coverage is among the broadest of any sports car manufacturer . Each Porsche is covered by a two - year new vehicle warranty with unlimited mileage , and includes the Porsche ASSIST^TM roadside assistance program ( pending approval for vehicles sold in California ) . The fully galvanized body and 26 - step paint and anti - corrosion process enable Porsche to warranty each car for ten years and unlimited mileage against rust perforation , protection unmatched by any other sports car maker . In addition , the paintwork carries a three - year limited warranty .

For more details:

• 911 Carrera 2
• 911 Carrera 4
• 911 America Roadster
• 911 RS America