Year: 1973

For the F series, the 190bhp 911S followed the same upgrades as the 911E; the most significant being the deletion of the short-lived external oil-filler flap in the right-hand rear wing. It also adopted the fashionable black trim around the front and rear lights, and black front quarter grilles.

Total 911 Rating:

Capacity: 2341cc
Compression ratio: 8.5:1
Maximum power: 190bhp at 6500rpm
Maximum torque: 216Nm at 5200rpm
Brakes: Front: 282mm discs; rear: 290mm discs
Wheels & Tyres: Front: 15x6J, 185VR. Rear: 15x6J, 185VR
Length: 4163mm
Width: 1610mm
Weight: 1050kg
0-60mph: n/a
Top speed: n/a

Year: 1969-1971

The C series saw an increase in engine capacity to 2195cc. At the same time, other minor improvements were made to the engine, including revised cylinder heads, larger valves and stronger connecting rods. In August 1970 the D series cars had hot-zinc coated undersides and other minor changes.

Total 911 Rating:

Capacity: 2195cc
Compression ratio: 9.1:1
Maximum power: 155bhp at 6200rpm
Maximum torque: 191Nm at 4500rpm
Brakes: Front: 282mm discs; rear: 290mm discs
Wheels & Tyres: Front: 15x6J, 185VR. Rear: 15x6J, 185VR
Length: 4163mm
Width: 1610mm
Weight: 1020kg
0-60mph: 7.5 sec
Top speed: 137mph