1974 targa "s" engine serial #

[1988TURBOLOOK]

Hello again all. Regarding a 1974 Targa "S" VIN# 9114112451. The green shroud engine in the car serial # begins with 645 which is a 1975 engine. A 1974 engine should begin with 614- is this correct? If the engine is not original, how much does this effect the car's value? If the original owner nuked the original engine in the first year of ownership, would Porsche have put in a new 1975 engine as a replacement? Is it common for engine numbers to overlap in the 1970"s or is this a solid engine replacement scenario. Either way I love the car but want to know if a non-original engine really kills the car's collector value? Thanks for your replies!

[Mick_D]

How long have you had this car? It's 42 years old now, and engine swaps could have happened more than once for that car. The numbers don't match, but you really aren't losing any money or value on it. You should treat the car as a car, not an investment. If you don't like that motor, now you can upgrade it without worrying about making the blueboods tut-tut and tsk-tsk.

[CountD]

Originally Posted by 1988TURBOLOOK

Hello again all. Regarding a 1974 Targa "S" VIN# 9114112451. The green shroud engine in the car serial # begins with 645 which is a 1975 engine. A 1974 engine should begin with 614- is this correct?

You are half right.

A 1974 Targa engine does not start with a 614-, it starts with a 634-. A 911S Coupe and a 911S Targa from 1974 all start with a 634, not a 614. A 614 is for a regular 911 and regular 911 Targa.

A 1975 Targa S and a 1975 Targa Couple start with a 645- if they are US Cars. If they are not US cars, they would be marked with a 635-.

So the car you are looking at does have a 1975 engine from a 911S USA Coupe or Targa if it has a 645-. If the chassis is a 1974 it should have a 634-.

What month and year was the car made? If the matching is important to you, you may want to look at another car. If not, it would be money off. Probably around $4K.

[CountD]

Another thing.

You have a regular 1974 911 Targa, not a 911 S Targa.

A 1974 Targa (Regular) would be : 91141XXXXX
A 1974 S Targa (S) would be : 91143XXXXX

So if its a '41' its a regular, and if its a '43' it's a S.

Looks like you have a regular 911 Targa with 1975 911 engine.

PS. All these numbers are in the Porsche 911 RedBook and taken from the latest edition (2015)