The Porsche 964 is the company's internal name for the version of the Porsche 911 model manufactured and sold between 1989 and 1994. It featured significant styling revisions over previous versions of the 911, most prominently the more integrated bumpers (fenders), although it was still obviously a 911. It was the first generation of 911 to be offered with Porsche's optional Tiptronic automatic transmission as well as the first generation to be offered with all wheel drive.

Name

"Type" 964 (nine-sixty-four) or simply 964 (nine-six-four) is in fact the internal code name for the car; the vehicle was badged simply as Carrera 2 or Carrera 4. The official name for the model, as printed on the front of the Owner's Manual, is "Porsche 911 Carrera 2" or "Porsche 911 Carrera 4". The 964 name is now often used to distinguish this car from other generations of the Carrera, especially among Porsche enthusiasts.

Carrera 2 and 4

The 964 was considered over 85% new as compared over its predecessor, the Carrera 3.2. The first 964s available in 1989 were AWD equipped "Carrera 4" models; Porsche added the rear wheel drive Carrera 2 variant to the range in 1990. Both variants were available as a coupe, Targa or Cabriolet. The 964 Carrera was the last generation sold with the traditional removable Targa roof. Later evolutions of the Targa, starting with the 993 generation, replaced that setup with a complex glass-roof "greenhouse" system. A new naturally-aspirated engine called the M64 was used for 964 models, with a flat-6 displacement of 3.6 litres. Porsche largely revised the suspension replacing the rear torsion bars with coil springs and shock absorbers. Power steering and ABS brakes arrive to the 911 for the first time and they were both made standard. The exterior bumpers and fog lamps became flush into the car, allowing for better aerodynamics. A new electric rear spoiler raised as speeds above 50 MPH and lowered down flush with the rear engine lid at lower speeds or when stopped. A revised interior featured standard dual airbags beginning in 1990 for all North American production cars. A new automatic climate control system provided superior heating and cooling. Revised instrumentation housed a large set of warning lights that were tied into the car's central warning system which alerted the driver to a possible problem or malfunction.

Engine

Engine design: Air/oil cooled, horizontally-opposed, dry-sump lubrication, rear-mounted
Engine displacement: 3600 cc (220 cu in)
Cylinders: Six, light alloy head
Bore and stroke: 3.94 x 3.01
Compression ratio: 11.3 : 1
Fuel/ignition: Electronic fuel injection, DME controller, with twin-spark with knock regulation
Crankshaft: Forged, 8 main bearings, enclosed in light alloy case
Valve Train: Overhead cam, one per bank, double chain drive
Power: 184 kW/247 hp (SAE net)/250 PS (DIN) @ 6100 rpm
Torque: 310 N·m/228 ft·lbf @ 4800 rpm
Engine speed limitation: 6700 ±20 rpm

Performance

Top speed: 163 mph (261 km/h), 159 mph (256 km/h) (Tiptronic)
0-60 mph: 5.5 s (manual transmission), 6.2 s (Tiptronic)
1/4 mile: 13.6 s (C2), 14.0 s (Tiptronic), 14.1 s (C4)
Coefficient of drag: 0.32
Fuel consumption approx 24 mpg

Selected dimensions/capacities

Curb weight (to DIN 70020): 3,031 lb/1,375 kg (C2); 3,100 lb/1,406 kg (Tiptronic), 3,252 lb (1,475 kg) (C4)
Wheelbase: 89.4 in (2,270 mm)
Overall Length: 168.3 in (4,270 mm)
Width 65.0 in (1,650 mm)
Height: 52.0 in (1,320 mm)
Front Track: 54.3 in (1,380 mm)
Rear Track: 54.1 in (1,370 mm)
Ground Clearance: 4.7 in (US)
Fuel Tank: 20.3 gal (US)
Engine Oil: 11.5 L (12.1 qt US), oil change volume: 9 L (9.5 qt US)
Transmission Fluid: 3.6 L (3.8 qt US) (C2), 9 L (9.5 qt US (Tiptronic), 3.8 L (4.0 qt US) (C4)

Carrera RS variants

In 1992, Porsche produced a super-lightweight, rear-wheel-drive only version of the 964 dubbed Carrera RS for the European market. It was based on Porsche's 911 "Carrera Cup" race car and harkened back to the 2.7 and 3.0 RS and RSR models. It featured a revised version of the standard engine, titled M64/03 internally, with an increased power output of 260 bhp (194 kW; 264 PS) and lightweight flywheel coupled to the G50/10 transmission with closer ratios, asymmetrical Limited Slip Differential and steel syncromesh. A track-oriented suspension system with 40 mm (1.6 in) lower ride height, stiffer springs, shocks and adjustable stabilizer bars without power steering (RHD UK cars did have power steering). A stripped-out interior devoid of power windows or seats, rear seats, air conditioning, cruise control, sound deadening or a stereo system (optionally fitted) and new racing-bucket front seats were part of the package. The trunk hood was made of aluminum, the chassis was seam welded and sound deadening was deleted. Wheels were made of magnesium and the glass was thinner in the doors and rear window. The Carrera RS is approximately 345 pounds (155 kg) lighter than the US version Carrera 2 model. Also available were a heavier Touring variant (with sound deadening, power seats (optional), undercarriage protection and power windows) and an N/GT racing variant with a stripped, blank metal interior and a roll cage. They also came with optional lights on the visors.

A later ultra-limited production version, the Carrera RS 3.8 featuring the Turbo body and a 300 bhp (224 kW; 304 PS) 3.8 litre version of the M64 motor was sold briefly in Europe.

The Carrera RS was not sold in the USA because Porsche Cars North America felt the car's aggressive tuning was not suited to the American market. In 1992, 45 USA-legal cars that were very similar to the Carrera RS were imported to the USA for a proposed "Porsche Carrera Cup" racing series. This Carrera Cup series was to function as a support race for the American CART racing series just as European Carrera Cup has supported Formula One.

These 45 cars were identical to a Carrera RS other than having airbags (with required electric windows), alarm system, American lighting, American bumpers, aluminum wheels, and standard seats. The cars otherwise had the lightweight seam welded chassis, lightweight interior trim, aluminum hood, lightweight door glass, suspension, brakes, G50/10 transmission and M64/03 engine etc. of the Carrera RS. These cars were approximately 200 pounds (90 kg) lighter than a normal USA Carrera 2 model.

The plan was for Andial, the then equivalent of what is now Porsche Motorsport USA, to convert these cars to full racing specification, however, due to lack of sponsor support for the Carrera Cup series, it was canceled before it began. The 45 cars imported to the USA for this series were then sold, quietly without any advertising so as not to compete with the new RS America, through normal dealer channels. These cars were supplied with a dash plaque which indicated that they were the "Carrera Cup USA Edition".

In order to please devoted American 911 enthusiasts who wanted an RS model, Porsche produced the RS America . The RS America was produced as a model year 1993 and 1994 car based on the USA Carrera 2. The RS America featured a distinctive "whale tail" spoiler, a partially stripped interior with flat door panels (from the European RS) and carpeting along with a luggage shelf replacing the rear seats. Cloth covered sports seats, 17 inch wheels and M030 Sports Suspension were fitted as standard. The logo "RS America" was written on the deck lid along with an "RS" logo in front of the rear wheels. Deleted to save weight were power steering, cruise control, powered side mirrors, air-conditioning, sunroof and radio, although the air-conditioning, sunroof and radio as well as a limited slip differential could be ordered as options. The RS America was listed by Porsche as weighing 2,954 pounds (1,340 kg), 77 pounds (35 kg) lighter than the weight listed for a stock Carrera 2. The standard USA Carrera 2 brakes, engine and gearbox were used. North American engine.

Engine

Engine Design: Air- or oil cooled, horizontally-opposed, dry-sump lubrication, rear-mounted Engine
Displacement: 3600 cc (220 cu in)
Cylinders: Six, light alloy head
Bore and Stroke: 3.94 x 3.01 in (100.0 x 76.5 mm)
Compression ratio: 11.3 : 1
Fuel/Ignition: Electronic fuel injection, DME controller, twin-spark with knock regulation
Crankshaft: Forged, 8 main bearings, enclosed in light alloy case
Valve Train: Overhead cam, one per bank, double chain drive
Power: 191 kW/260 hp (SAE net) @ 6100 rpm
Torque: 312 N·m/230 ft·lbf @ 4800 rpm engine

Turbo

Porsche introduced the 964 Turbo model in March, 1990 as the successor to the 930. Unfortunately, they hadn't had the necessary time to develop a turbocharged version of the 3.6 litre M64 engine, and choose to re-use the 3.3 litre engine from the 930, with several minor revisions that made the eng

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