one per bank, double chain drive Power: 184 kW/247 hp (SAE net)/250 PS (DIN) at 6,100 rpm Torque: 310 N·m/228 lb·ft at 4,800 rpm Engine speed limitation: 6,700 rpm Chassis The suspension was redesigned using coil springs instead of torsion bars, the first major engineering changes since the original 911. The front suspension used MacPherson struts, a system that has continued for all subsequent versions, but the rear suspension retained semi-trailing arms. 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: Overall Length: Width Height: Front Track: Rear Track: 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 harked 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 and lightweight flywheel coupled to the G50/10 transmission with closer ratios, asymmetrical Limited Slip Differential and steel synchromesh. A track-oriented suspension system with 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 and the chassis was seam welded. 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