THE 1991 PORSCHE 964 Turbo

The 911 Turbo: new top model in the 911 range

Porsche 964 Turbo

The Porsche 911, the first version of which in 1975 was a trend-setter in turbocharged technology among modern production cars, made its renewed debut at the 1990 Geneva Automobile Salon in fundamentally revised form. Due to eter production in the autumn of 1990, the new 911 Turbo remains loyal to the classic rear engine, rear wheel drive concept which has been typical of Porsche sports cars ever since the original 356 model. The successful turbocharged 3.3-liter horizontally-opposed six-cylinder engine has been extensively revised. It now has exhaust emission control by closed loop, three-way catalytic converter and develops 235 kW (320 bhp) at an engine speed of 5750 1/min. This outstanding flow of power is confirmed by the maximum torque of 450 Nm, available at 4500 1/min. Among the keys to this quite impressive rise in power are the revised air intake system, an optimized exhaust system and a larger charge air intercooler. Among modifications to the engine's auxiliaries all- are an electronic ignition system, and fuel injection revised to cope with the higher performance level. By installing a double-mass flywheel, Porsche's engineers have minimized driveline noise and vibration patterns and achieved improvement the turbocharged engine in its latest, a further in refinement. Thanks to developed form, Porsche's supercar performs even more impressively than before, accelerating from 0 to 100 km/h (62mile/h) in 5.0 seconds, with a top speed of 270 km/h (167 mile/h). Noise levels lower than ever, yet this model's are unmistakable "sound" is still there. As before, the Turbo drive has a five-speed gearbox at his disposal, but one with a faster, lighter and more precise shift action than ever before. The 911 Turbo also has the new body and suspension features developed for the Carrera and 4 models with their naturally aspirated engines. The body is aerodynamically efficient, with the safety bonus freedom from liftforces; it has the characteristic widened wheel arches that have always been typical of this top 911 version. The big rear spoiler, a classic Turbo feature, is also retained. Under the new body, the suspension is also new, with toe-correcting semi-trailing the rear, optimized arms at spring-damper struts at the front, power steering and ABS short, everything needed for smooth, vice-free handling. Larger light alloy wheels of new five-spoke design are now fitted (7 J X 17 rims with 205/50 ZR 17 tires at the front, 9J x 17 rims with 255/40 ZR 17 tires at the rear). As with the basic body outline, the interior also retains many a classic 911 element, but in revised form with functional improvements for numerous even greater driving Leasure. With its exceptionally complete specification (power steering, catalytic converter, ABS, air conditioning etc.), the new 911 Turbo means driving fascination at a performance level which even these classic rear-engined cars also many interesting have never achieved before. There are special equipment options including the airbag restraint system and the new Porsche "Symphony" radio.

Technical data Porsche 911 (964) Turbo
Body  Two-door Coup√©, 2 + 2 seater 
Engine  Air-cooled, horizontalily opposed four-stroke six-cylinder with turbocharger, charge air intercooler and closed loop three-way metal catalytic converter 
Bore  97 mm 
Stroke  74.4 mm 
Displacement  3299 cm3 
Compression ratio  7,0 : 1 
Power output  235 kW (320 bhp) at 5750 1/min 
Max torque  450 Nm at 4500 1/min 
Driveline   Engine and transmission at rear, bolted : together to form a single rigid unit 
Brakes  Hydraulic, dual circuits, internally ventilated and drilled front and rear disks, 4-piston calipers, brake booster, ABS 
Wheels and tires  Front 7J x 17 with 205/50 ZR 17 
    Rear 9J x 17 with 255/40 ZR 17 
Weights  Unladen kg 1470 (3241 1b) 
Performance  Acceleration, 0-100 km/h 5,0 s 
    Top speed 270 km/h (168 mph)