Differnce Between 1971 and 1973 Porsche E,T and S
 

What is the primary difference between Porsche 911 T, E. and S? Specifically 1970 through 1973?

motor & gearbox

or do you mean between T and E and S of each year? your question is confusing

Since I know the 1970 Model Year U.S.cars fairly well, I’ll address that year only. Note that various sources sometimes show conflicting information. 1971 cars are virtually the same as 1970. Top level summary

Engine
T =Twin Zenith 40 TIN carburetors at 125 DIN HP, Compression ratio = 8.6:1
E = Bosch Mechanical Fuel Injection at 155 DIN HP, Compression ratio = 9.1:1
S = Bosch Mechanical Fuel Injection at 180 DIN HP, Compression ratio = 9.8:1
S has the highest reline (7,200) while T and E are lower


Transmission
T = 4 Speed standard, Sportomatic = optional
E = 5 Speed standard, Sportomatic = optional
S = 5 Speed, Sportomatic = not optional, too much POWER

Suspension:
E came with (crap) Borg self leveling hydropneumatic front struts, with no front sway bar, as on the T and S. Most E’s will have been retrofitted to T/S MacPherson struts, etc. S model has a rear antisway bar which was not on the T and E.

Body:
The S came with an aluminum engine lid and aft-center bumper (license) section. T and E models used steel for these components.

Instrumentation:
S came with the full compliment of instruments. The T, and I believe the E, came with fewer gauges. Full compliment instrumentation was an option on the T and E.

Standard Wheels:
T = 5 ½ x 15 Magnesium
E = 5 ½ x 14 Fuchs
S = 6 x 15 Fuchs

That's it. Hope it clears up the 70/71.

Al

By 1973 the engines were sized up to 2.4 litre powerplants. HP ratings were progressively higher with T or Touring as the lowest, Einspritzen or "Fuel injected" in the middle, and "Super" the highest. Can get you the specific hp numbers this afternoon.

about 40K respectively over here :thumbup:

I long for an S drooooooool.

I saw the shell of one on a trailer today in Chino. nothing but rust, but definatly an early 911.

The bible says:

1970/1 2.2L
T - 125hp
E - 155hp
S - 180hp

1972/3 2.4L

T - 130hp (US 140hp)
E - 165hp
S - 190hp
RS - 210hp 2.7L

To dig deeper...get Peter Zimmermann's book "The Used 911 Story"... really fun reading and tons of valuable tips... :thumbup:

In the earlier post I forgot to mention that the 70/71 S had light alloy calipers at all four corners, and a right front fender mounted engine oil cooler which activates at 190 oF. These components were not (I think) standard/optional on the T and E. There is something called a 73 ½ 911T, which I don’t address.

Since no one has provided 72/73 T/E/S information, I’ll give it a shot. I encourage the 72/73 owners to make any corrections or additions.

Engine (2.4L):
T (U.S. only) = Bosch Mechanical Fuel Injection at 140 DIN HP. Compression ratio = 7.5:1. ROW was still carburetor.
E = Bosch Mechanical Fuel Injection at 165 DIN HP. Compression ratio = 8.0:1
S = Bosch Mechanical Fuel Injection at 190 DIN HP. Compression ratio = 8.5:1

Transmission
New this year, the 911 5 speed went to an H pattern for 1st thru 4th, with 5th being right, forward. The 70/71 were first left and back, with 2nd thru 5th being the H pattern.
The 4 speed was “offered’ on 72/73 T/E/S, and the Sportomatic and 5 speed were “available” on the T/E/S. My references are unclear as to which transmission was considered standard equipment for each model.

Suspension
The E now came standard with the MacPherson Strut system as on the T and S (and the 70/71). The hydropneumatic suspension was available as an option on the T/E/S.
One source states that the S had front and rear antisway bars, and that they were optional on the T and E. Another source says T/E/S all had standard front and rear antisway bars.

Body
The 72 only has the external oil tank filler access lid on the right rear fender. The engine grille went to black in 72, from the chrome of 70/71. Starting in 72 the external rear view mirror is rectangular in shape, changed from the round (Durant) of the 70/71. The 72S came standard with a new front spoiler that reduced lift at speed. It was initially optional on the T and E, but was so popular that it was made standard on all models. To meet new U.S. safety regulations the 73 911 grew huge front and rear rubber bumper guards.

Instrumentation
No information, but is similar to 70/71.

Wheels
T = 5.5 x 15 Steel
E = 6.0 x 15 Steel
S = 6.0 x 15 Fuchs forged light alloy, as on 70/71

Hmmm. Seeing as how Pete's book says the 73.5 T is Porsche's "First 10" and seeing as how I have owned mine for 20 years, I figured I had to chime in! :)

Just a few additional points from memory when I bought it (and 20 year old memory is likely to be full of holes!) Before '73, the 911T and some 911Es had engine internals that were different from the S - like different quality metals and such. As the years went on, the differences became smaller and smaller. So, by 73 (and possibly '72), the insides were identical in quality. The cams were different of course, and the CIS T has special high dome pistons, but the quality was not different.

I have the original window sticker from my car. I will list the options that were added to the car at the factory, showing they were options - but, I have heard that most of the cars came with these "options" anyway:

Importers Sugg. retail price w/o access: $8,060
5-speed transmission - $165
Forged Alloy Wheels 6x15 - $543
Stabilizer bars, front and rear - $97
Oil cooler - $252 (trombone type)
Chrome strip - fender - $38 (see, it is separate from S trim)
Appearance group - $190 (assuming this is the wide chrome under the doors and S wider rubber and S wide aluminum that holds the wider rubber, and S rubber bumpers with larger cut out for wider trim, and probably S gauges and carpet)
Spoiler - $134 (this is the front metal spoiler)
Retractable Antenna, left - $62 (interesting because the radio was not listed, but written in by hand, presumably for dealer install)
Tinted glass, all around - $142

Radial Tires - NC
Fresh air heating and ventilation - NC
Leatherette cov. steering wheel - NC (interesting they say "Leatherette" as mine is leather)
Electric heated rear window - NC
Mechanical fuel injection (yes, but I have CIS???) - NC
4 wheel ventilated disc brakes - NC
3 speed windshield wipers - NC
High Capacity Disch. Ignition - NC
Undercoating - NC
Rubber bumperettes, F&R - NC

Total: $9,713.50


So, gee, I'd have an S if only I got new calipers, heads, cams and mechanical injection. Just a few critical parts!

Although most available info is sketchy, as I understand it...

Front spoiler/bumper: (1972) Std. on S, optional on T & E. (1973) Std. on E & S, optional on T.

Suspension: 1972/'73 S got 15mm sway bars front & rear std, the same bars were optional on E & T. Sway bars were not available on cars with Hydropneumatic suspension. The '70/71 S cars also used 15mm bars front and rear, and they were optional on T & E cars. T cars also had a 13mm front bar only available as an option.

Wheels: The '73 E got 6x15 cast alloy wheels std., which were optional for T models. The 6x15 steel wheel used in '72 was dropped.

Instruments: 1970/'71 E got S instruments. 1972/'73 E got a basic instrument panel, while S instruments (usually called full instrumentation) were available as an option on T & E cars.

Transmission: Sporto was considered optional equipment for '72/73 T, E & S models. Although you would be hard pressed to find a '72/73 car with a 4-speed manual, believe it or not the 4-speed was standard, the 5-speed was optional.

Bakes: All S & E models, '70-73, fitted with light alloy "S" front calipers got gray cast iron rear calipers. All '70-73 models use vented brake rotors.

Auxiliary (front) oil cooler: Factory literature shows that a front cooler was std on '72/73 S models, but is unclear if it was optional on T & E models.

Good summary of 911 history from Edmunds here - http://www.edmunds.com/porsche/911/history.html

Porsches in those days many times came only with a "radio Trim" kit leaving it to the dealer or the owner to install the radio from many choices. The factory would integrate in an antenna and 2 or 4 speakers depending upon the vintage of the car. They would close off the radio area in the center with a dash closure plate which you could easily remove and install the thing. My first ordered Porsche I ordered without a radio but it came with the radio antenna and 2 speakers.

Jay, those options you listed out --what trim level car was that from? I'm trying to restore a 73t that had the Front Spoiler. I'm arguing with a friend who says that because I have the spoiler I should have had chrome strips like the S had but according to your sticker, it appears as a separate option.

Wow. Old email. Still happily have the car! I'm glad my window sticker answered an unknown listed by Pete: Yes the front oil cooler was an option for '73.5 Ts.

In answer to your question about the spoiler always coming with the chrome strips, which S chrome strips? My car has both the S chrome strip along the rockers, and the S chrome strip around the wheel arch. I can't point you to specific factory materials to prove this. But when I bought the car in '88, I know that I knew that the wheel arch strips were not on all cars, and was an extra option. And I saw cars with and without them that had the front spoiler and wide S rockers strips.

Also note that the rocker side strips are not just more aluminum. They hold the wider S rubber. I do recall that the S front spoiler, S front and rear wide rubber, rocker strips with S rubber, and S gauges were some sort of official "package." Even if they were listed separately on the invoice. I can't see Porsche selling a car that had wide rubber front and rear but narrow rubber on the sides. So I'm going to agree with your friend. But maybe they also sold a rocker strip that had the wide rubber but not the wide chrome that I am not aware of.