Following on the heels of the rear-wheel drive Carrera, an updated 997 Carrera 4 appeared in 2008.
Visually, the big news was the return of the classic full-width rear reflector between restyled LED rear lamps. Also at the back, the bumper was changed slightly, especially between the exhaust outlets and, as before, the car was 44mm wider across the rear.
At the front were LED daylight driving lamps, while Bi-xenon headlamps became standard and borrowed the Cayenne’s dynamic bending system. Also at the front, the air intakes were restyled. Finally, the door mirrors became slightly larger, to meet upcoming EU regulations.
However, this was more than a mere facelift. The 997 was given an all-new engine with 40 percent fewer components. The two-piece crankcase now had integrated crankshaft bearing housings, which reduced weight and size. Also, there was now no intermediate shaft driving the timing chains.
The stroke of the 3.6-litre engine increased, by 1.3mm, to 81.5mm, while the bore went up by 1mm to 97mm. This meant that the capacity increased by 18cc to 3614cc.
The cylinder heads had a simpler construction, and were now one-piece with integrated camshaft bearings and guide liners for the hydraulic cup tappets. The lubrication system was optimised to improve efficiency. Finally, and most importantly, the engine now used Direct Fuel Injection, or DFI.
An new option was the PDK (Porsche-Doppelkupplung, or Porsche double clutch) transmission, which replaced the previous Tiptronic S. This seven-speed transmission gave a choice of automatic or manual changes and was faster and more efficient than Tiptronic.
The four-wheel-drive system came from the 997 Turbo and its electronically controlled PTM (Porsche Traction Management) replaced the previous viscous multiple-plate clutch set-up.
The 997-model 911 Carrera 4 was offered with a fully electric soft-top to give open-air motoring. The roof was revised from 2008 to reduce wear on the fabric surface during opening and closing.
Compression ratio: 12.5:1
Maximum power: 345bhp at 6500rpm
Maximum torque: 390Nm at 4400rpm
Brakes: Front: 330mm discs; rear: 330mm discs. Servo assisted with ABS
Suspension: Front: Lower wishbones and MacPherson struts with combined coil springs and dampers, plus anti-roll bar
Rear: Multilink with combined coil springs and dampers, plus anti-roll bar
Wheels & tyres: Front: 18x8J with 235/40ZR18 tyres. Rear: 18×10.5J with 265/40ZR18 tyres
Weight: xxxxkg (coupé)
0-62mph: xx sec (PDK: xx)
Top speed: xxxmph (PDK: xxxmph)
Did you know?
Despite having more power, the revised 997 was actually more economical, thanks to Direct Injection and the seven-speed PDK transmission.