It's the time value tradition of "Paper, Scissor or Rock". The winner gets to pick the numbers.

 

it is because it is 2hp less than a 930

 

931 is 924 turbo

 

Nicole is right, for fewc and loosely other cars it was:
9 porsche
0/1/2/3/4/5/6/8/9 generation
4/6/8 cylinders (except that 1 was turbo for 931 and 951)

Not valid for many but valid for many. That is the true reason, and deviance (as in the case of the 968) was because of extraneous reasons. 968 was 944S3, but ended up being so different that a new number was required, and simply the closest available was assigned. Likely for 959 it was picked at random so that (because the car was so unusual) it could not infringe on needed number for possible later models.

 

Tuk,

The 931 is a turbo version of the 924. It was raced in the GT versions.

Dennis

 

We need to clear this up once and for all:
928 refers to September, 1928; celebrating the year that Graf Zeppelin was completed (right Nicole?)

 

So was the 911 celebrating the first Indy 500 in 1911?

 

 

Agree with you, don't understand what he means.

Although He says that 1 number is for turbo versions, but what about 937 wich was 924 carrera GT?

STL


-------
excuse for my anglisch i'm just a fench guy

 

I was looking for a muffler thread, found this one - did anyone know the answer to the above question?

 

It was probably sequential after the 934, 935, 936 race cars.

No, it was to celebrate the Colt 1911 for helping win WWII so that Porsche could design sports cars instead of kubelwagens and panzers.

 

Heinrich's post I kinda understand but what about the 912 and 914 and their variations?

911 = First model in it? 6 cyl
912 = Same body 4 cyl

914 = 4cyl
916 = 6cyl

930 was based on a 3.0L version of the earlier 911 designed 2.2/.4/.7L was my understanding but turbocharged
935 was ? displacement turbocharged

924
931 next sequence of 10's = 3, and 1st model in it?

944
951 next sequence of 10's = 4, and the first model in it?

968 a combination of 944 and 928 series cars

Michael

 

I prefer the design code name for Type 928: 'Project K'

 

Hadn't seen the confused replies. I meant: "Invalid in some cases, valid in some cases". So, the designation 937 I hadn't heard, but agreed it was likely sequential after 935. One must remember, racing Porsches did not follow the production car designations. Case-in-point, 962 etc. Contrast 964 roadcar.

 

They were supposed to be 901 and 902, but the frogs sued.

13 is unlucky (or it was designed and never built. There was a 915, but I don't think it was built unless it was a racing 914.

930 came after 928. 928 development started in 71 or 72, and I think the 930 started in 73. 935 is a race car that happened to have some street cars built by DP. IIRC, it's also 3.0liters.