1994 Porsche 911 Carrera 4
For the new 993 platform, Porsche heavily revised their four-wheel drive system to include a viscous coupling system that distributed power to the front and rear wheels. This made the model much smoother than the C4 it replaced.
Along with the new viscous coupler from Viscodrive, Porsche fitted a rear limited-slip differential and and automatic brake differential which applied braking force to a slipping rear wheel.
The system was vastly better than the 964’s computer controlled unit in that it added only 110 pounds to the weight of the car and had 50% less friction loss.
Outward, the Carrera 4 was distinguished by it’s titanium-finished brake calipers, clear front turn signals and rear rear turn signals.
Story by Supercars.net
In Detail
| type | Series Production Car |
| built at | Stuttgart, Germany |
| body stylist | Tony Hatter |
| engineers | Fritz Bezner |
| engine | M64 Flat-6 |
| position | Rear, Longitudinal |
| aspiration | Natural |
| block material | Aluminum Alloy |
| fuel feed | Electronic Injection |
| displacement | 3600 cc / 219.7 in³ |
| bore | 100.0 mm / 3.94 in |
| stroke | 76.4 mm / 3.01 in |
| power | 202.8 kw / 272 bhp @ 6100 rpm |
| specific output | 75.56 bhp per litre |
| bhp/weight | 188.76 bhp per tonne |
| torque | 329.5 nm / 243 ft lbs @ 5000 rpm |
| redline | 6700 |
| body / frame | Unitary Steel Monocoque w/Plastic Bumpers |
| driven wheels | 4WD |
| wheel type | Cup Design ’93 Cast Aluminum |
| front tires | 205/50ZR17 |
| rear tires | 255/40ZR17 |
| front brakes | Ventilated Discs w/4-Piston Aluminum Calipers |
| f brake size | 32 x 305 mm / 1.26 x 12.01 in |
| rear brakes | Ventilated Discs w/4-Piston Aluminum Calipers |
| r brake size | 24 x 300 mm / 0.94 x 11.81 in |
| front wheels | F 43.2 x 17.8 cm / 17 x 7 in |
| rear wheels | R 43.2 x 22.9 cm / 17 x 9 in |
| steering | Rack & Pinion |
| f suspension | MacPherson Struts w/Stabilizer Bar |
| r suspension | Multi-Link A-Arms w/Coil-Over Dampers, Stabilizer Bar |
| curb weight | 1441 kg / 3175 lbs |
| wheelbase | 2271 mm / 89.4 in |
| front track | 1445 mm / 56.9 in |
| rear track | 1473 mm / 58 in |
| length | 4244 mm / 167.1 in |
| width | 1735 mm / 68.3 in |
| height | 1316 mm / 51.8 in |
| transmission | Type 950 6-Speed Manual |
| tran clutch | Single-Disc |
| gear ratios | 3.82:1, 2.05:1, 1.41:1, 1.12:1, 0.92:1, 0.78:1 |
| final drive | 3.44:1 |
| fuel capacity | 73.43 litres or 19.4 gal. |
