911 Street Model Variants
The wide world of 911 models can get confusing. Tony Callas as put together a quick-reference guide of 911 Models for easy reference of street 911 models.
1964-1968 Short wheel base (Long Hood)
-Oil and filter change – FILL QUANTITY 8.50 - 9.00 Quarts
-All engines 2.0 Liter
-All engine cases aluminum
-1967 first year of the 911S
-1967 911S introduction of Fuchs wheels – 2 versions – 4.5 in for the 911S – 7.0 in for the 911R
-1967 was the first year for factory-supplied Weber carburetors with the 911S getting 40IDS carbs – 1st 20 cars got 40 IDA special w/ no high speed circuit - but stamped S on the end.
-1968 first and only year of 911L
-1968 911 engine case now magnesium (mid-year changeover)
-1968 911S only in Europe (Heavy emissions year)
-1968 US cars had smog pumps and emissions equipment
-Bendix style fuel pumps located in engine compartment
1969 First year of Long wheel base (Long Hood)
-Oil and filter change – FILL QUANTITY 8.50 - 9.00 Quarts
-1969 first year of front and rear fender flares
-1969 911E & 911S returns to US with first year of mechanical fuel injection
-911T equipped with Zenith carburetors – no, Weber 40 IDT carbs through 1969, and 914-6.
-1969 first year of all three 911T, E and S models
-911E had hydro-pneumatic front suspension – Optional Comfort Group – included 14 x 5.5” Fuchs
-Fuel pump for MFI cars mounted to front suspension cross member with special bracket – until late ’71 when the pump moved back near the left rear sway bar bracket. It stayed there through 1976.
1969 First year of Long wheel base continued
-Fuel pump for carburetor cars was a Hardy and mounted in engine compartment
-CDI ignition was introduced … Standard - Option? – Standard for 911E and 911S – often added to the 911T as the CDI harness was available separately and the mounting bracket was present in the eng compartment left forward corner.
1970-1971 Engines upgraded to 2.2 Liter
-Oil and filter change – FILL QUANTITY 8.50 - 9.00 Quarts
-911S and 911E were fuel injected
-Fuel injection pump on MFI cars mounted on cross member
-Carburetor pump changed to roller-type and moved to front cross member – and included a return line to the tank for both MFI and Carb punps.
-911T equipped with Zenith carburetors … European cars delivered with Webers? – My guess, is Zenith for everywhere. US Zeniths had the smog valve on the side.
1972-1973 Engines upgraded to 2.4 Liter
-Oil and filter change – FILL QUANTITY 8.50 - 9.00 Quarts
-1972 Oil filler cap lid on right rear exterior fender and both year models had year specific oil tanks. By 1974, the oil tanks became more standardized – and held almost a quart more.
-915 gearbox introduced in 1972 – with the troublesome early internal main shaft seal.
-1972-1973 had Mechanical FI for all models T, E, and S
-Fuel pumps moved to back of car on driver’s side at torsion tube – (opps – yes!) actually a few 1971s got this, too.
-1973.5 introduction of CIS FI
1974-1977 Engines upgraded to 2.7 Liter
-Oil and filter change – FILL QUANTITY 10.50 - 11.00 Quarts – the oil tank changes stopped!
-Larger oil tank & filter orifice
-1974-1977 special model named Carrera (Had SC rear flares) but the std 911S engine.
1974 only - had two engine options for the US – std 911 w/ smaller intake runners, 8.0:1 compression, and a slightly milder cam timing. 911S had 8.5:1 comp, larger intake ports and runners and the camshaft that would continue through 1977S.
-1975-1979 had Smog Pump – EGR, and Thermo Reactors through 1977 – then the first cat in 1978 and 1979 with air pumps, diverter valves and EGR.
-1974 introduction of short front hood and accordion bumpers
-1976-1977 US 930 (911 Turbo) introduced with 3.0 Liter engine with aluminum case – still with the six bolt 2.4 L crankshaft.
-Fuel pump moved back to the front in 1976
1978-1983 Name changed to 911SC and upgraded to 3.0 Liter
-1978-1979 Oil and filter change – FILL QUANTITY 10.50 - 11.0 Quarts
-1980-1989 Oil and filter change – FILL QUANTITY 10.50 Quarts
-1978 all engines have aluminum case
-1980-1983 O2 sensor introduced
-1978-1989 930 engine upgraded to 3.3 Liter engine (No turbo in US from 1980-1985)
1984-1989 Name changed to Carrera
-Oil and filter change – FILL QUANTITY 10.5 - 11.0 Quarts
-1984-1989 engines upgraded to 3.2 Liter
-1984 introduction of oil fed Carrera chain tensioners
1984-1989 Name changed to Carrera continued
-1984 introduction of DME Motronic FI
-1984 introduction of integrated fog lights
-1987 introduction of G50 gearbox with hydraulic clutch
1989 964 C4 Introduced / 1990-1994 964 C2 and C4 (2DW & 4WD)
-Oil and filter change – FILL QUANTITY 9.50 - 10.50 Quarts
-1994 930 engine upgraded to 3.6 Liter
-964 engines upgraded to 3.6 Liter with Bosch ME 2.1 FI
-Sequential fuel injection introduced
-Plunge-proof and Potential free O2 sensor introduced
-1989 964 C4 has light-weight flywheel
-1990 964 C2-C4 has Dual-Mass Flywheel
1995-1998 993 C2-C4 Introduced
-Oil and filter change – FILL QUANTITY 9.50 - 10.50 Quarts (2 Oil Filters)
- Change to hydraulic lifters
-1995 with Bosch ME 2.10.1 FI
-1996 C2S - C4S introduced with Bosch ME 5.2 FI
-1996 993 OBD-2 system with quad O2 sensor system introduced
-1996 993 Vario-Ram intake system introduced
1999-2004 996 C2-C4 Introduced
-Oil and filter change – FILL QUANTITY 8.50 - 9.00 Quarts
1999-2004 996 C2-C4 Introduced continued
-3.4 Liter water-cooled M96 engine introduced
-1999 Vario-Cam Vane Adjustment systems introduced
-1999 996 BOSCH ME 5.2.2 with throttle cable introduced
-2000 996 BOSCH ME 7.2 with E-Gas introduced for 2000-2001
-2002 996 BOSCH ME7.8 introduced for 2002-2005
-2002 “Plus” type lifter adjustment system introduced
-2001-2005 996tt (Turbo) with Bosch ME 7.8
2005-2008 997 C2-C4 Introduced
-Oil and filter change – FILL QUANTITY 8.50 - 9.00 Quarts
-997 S models have 3.8 Liter engine
-2006-2008 introduction of Bosch ME 7.8_40
2009-2011 997-2 C2-C4 Introduced
-Oil and filter change – FILL QUANTITY UTILIZE Instrument Cluster
-All new MA1 DFI engine
-EMS SDI 3.1 (Siemens)
2012-2016 991 C2-C4 Introduced
-Oil and filter change – FILL QUANTITY UTILIZE PIWIS-2 TESTER (To 175%)
-EMS SDI 9 (Continental)
-First year of 991 chassis
-No MAF sensor
2017-2020 991-2 C2-C4 Introduced
-Oil and filter change – FILL QUANTITY UTILIZE PIWIS-3 TESTER (To 175%)
-All chassis are forced induction
-S 3.0 liter all new engine
-One piece cylinder heads
-New cylinder heads-fuel injector protrudes side of cylinder heads
-Plastic engine sump plate with quarter turn plastic drain plug
-EMS SDI 9 (Continental)
2020 992 S & 4S Introduced (8th Generation 911 – all redesigned)
-Oil and filter change – FILL QUANTITY UTILIZE PIWIS-3 TESTER (To 175%)
-All chassis are forced induction.
-3.0 Liter engine
-Retro square front hood (to copy 1974 G body intro -1989 911 front hood)
-Recessed exterior door handles
-DME (Bosch)
-Fuel injectors coded
-New chassis
-5X piezo electric (crystal) fuel injectors
-Dynamic engine mounts PADM (Porsche Active Drivetrain Mount system)