Chassie numbers
Chassie numbers
Can any one explane to me what the difference is between.
Chassis number.
And
Car number .
Thanks
Chassis number.
And
Car number .
Thanks
-
- Posts: 540
- Joined: Wed Nov 20, 2019 3:46 pm
- Location: Newton Mearns, Glasgow
Re: Chassie numbers
Hi Daren,
Particularly, in reference to 'our' cars, conventionally built, mostly before the second world war, the assembly of a motor car was commenced by laying down a bare Chassis or frame at the start of an Assembly Line.
in Austin practice, the Frame Number was stamped on the nearside leg of the chassis before it was painted. during the course of assembly a more easily identifiable plate was riveted either on the bulkhead (also known as the scuttle or dash), sometimes on the near (Left) side and sometimes on the face at the left hand side; or on the off (Right) side leg of the chassis behind the Steering Box.
The Chassis Number is a Serial Number preceded by a Letter which signifies the Model Range [A is for Sevens, E is for Sixteens & Eighteens, F is for Light Sixes, G is for Tens, H is for Twelves] and there are other codes for Twenties and Twenty Eights. I have a New Ascot and my Chassis Number is H38692; my Car Number is H/R38692 and my Engine Number is 1H38564. The Car Number is Usually the same as the Chassis Number but with an additional identifier showing the Series of the Model Range. The Engine Number, similarly the 'H' shows the fact it's a Twelve engine and the '1' is a factory designation in case of variants of that engine range.
Sounds complicated, but I'm sure that the system was designed so that the identification of spare parts was made easier to ensure that the correct parts were supplied for each range and model made in the factory.
Hope this answers your query.
Peter C. [6515]
Particularly, in reference to 'our' cars, conventionally built, mostly before the second world war, the assembly of a motor car was commenced by laying down a bare Chassis or frame at the start of an Assembly Line.
in Austin practice, the Frame Number was stamped on the nearside leg of the chassis before it was painted. during the course of assembly a more easily identifiable plate was riveted either on the bulkhead (also known as the scuttle or dash), sometimes on the near (Left) side and sometimes on the face at the left hand side; or on the off (Right) side leg of the chassis behind the Steering Box.
The Chassis Number is a Serial Number preceded by a Letter which signifies the Model Range [A is for Sevens, E is for Sixteens & Eighteens, F is for Light Sixes, G is for Tens, H is for Twelves] and there are other codes for Twenties and Twenty Eights. I have a New Ascot and my Chassis Number is H38692; my Car Number is H/R38692 and my Engine Number is 1H38564. The Car Number is Usually the same as the Chassis Number but with an additional identifier showing the Series of the Model Range. The Engine Number, similarly the 'H' shows the fact it's a Twelve engine and the '1' is a factory designation in case of variants of that engine range.
Sounds complicated, but I'm sure that the system was designed so that the identification of spare parts was made easier to ensure that the correct parts were supplied for each range and model made in the factory.
Hope this answers your query.
Peter C. [6515]
Re: Chassie numbers
Hi that is very interesting.
What does the H stand for ?
Do you have to take the steering box off to see number ?
Which side of box ? As if you are looking from the wheel .
What does the H stand for ?
Do you have to take the steering box off to see number ?
Which side of box ? As if you are looking from the wheel .
- peter_winney
- Posts: 1993
- Joined: Wed Nov 20, 2019 3:31 pm
- Location: BATH
Re: Chassie numbers
Daren
On the Lt12 an H prefix appears on chassis fitted with 4 cylinder engines and an F prefix on those fitted with 6 cylinder engines. From 1934 when 2 sizes of 12/6 engine were offered there was also a suffix /13 or /15 after the chassis No. Engine Nos were close to the chassis No, usually higher than the chassis No. but but not always, and prefixed IH or IF for 4 or 6 cyl Lt12
For a 10 the chassis No. prefix is G and the engine No prefix 1G (though 1G can also appear as a part No cast into the block - the engine No is stamped into the block).
Prior to August 1936 the "Car Nos" (Body Nos) and Chassis Nos did not align but from the introduction of the new programme models - New Ascot for the Lt 12/4, Goodwood for the Lt 12/6 ("Fourteen" although with the 15.9hp engine only) , and Cambridge 10 hp - the numbers aligned but the car No had a different prefix from the chassis - e.g. Peter C's with Chassis No. H 38692 and Car No. H/R 38692.
It is not unusual for the old buff logbook and modern V5 to show the wrong numbers!
Peter W
Photo shows stamped chassis No. on a Cambridge
On the Lt12 an H prefix appears on chassis fitted with 4 cylinder engines and an F prefix on those fitted with 6 cylinder engines. From 1934 when 2 sizes of 12/6 engine were offered there was also a suffix /13 or /15 after the chassis No. Engine Nos were close to the chassis No, usually higher than the chassis No. but but not always, and prefixed IH or IF for 4 or 6 cyl Lt12
For a 10 the chassis No. prefix is G and the engine No prefix 1G (though 1G can also appear as a part No cast into the block - the engine No is stamped into the block).
Prior to August 1936 the "Car Nos" (Body Nos) and Chassis Nos did not align but from the introduction of the new programme models - New Ascot for the Lt 12/4, Goodwood for the Lt 12/6 ("Fourteen" although with the 15.9hp engine only) , and Cambridge 10 hp - the numbers aligned but the car No had a different prefix from the chassis - e.g. Peter C's with Chassis No. H 38692 and Car No. H/R 38692.
It is not unusual for the old buff logbook and modern V5 to show the wrong numbers!
Peter W
Photo shows stamped chassis No. on a Cambridge
Member since July 1972
Reconnaissance is seldom wasted
Reconnaissance is seldom wasted
Re: Chassie numbers
Daren wrote:
> Can any one explane to me what the difference is between.
>
> Chassis number.
> And
> Car number .
>
> Thanks
Do you still need help with car details? If yes, you can easily do this by using a simple VIN Decoder app. Just go and search on Google for more information. All the best!
> Can any one explane to me what the difference is between.
>
> Chassis number.
> And
> Car number .
>
> Thanks
Do you still need help with car details? If yes, you can easily do this by using a simple VIN Decoder app. Just go and search on Google for more information. All the best!
- peter_winney
- Posts: 1993
- Joined: Wed Nov 20, 2019 3:31 pm
- Location: BATH
Re: Chassie numbers
Might work for modern stuff but not for old Austins. The VIN at DVLA can be either the chassis # or the car (body) #
Member since July 1972
Reconnaissance is seldom wasted
Reconnaissance is seldom wasted
Re: Chassie numbers
This looks to be a helpful forum and thread. I'm pulling together some details to help sell a tatty (barn-find condition) 1934 Light Twelve-Six (Lt 12/6) Ascot.
Does its F20757/15 chassis number mean that it was originally specified with a 15.9hp engine?
Engine is supposedly 1FF1631 (is this 1,711cc capacity?), though I've been unable to locate that number on the block yet. Car No. is F/BW 2900/15 and Reg No. is BMC 284 (London, 21st April 1934).
The car is currently on long-term display at the Atwell Wilson Motor Museum in Wiltshire. We however don't have the resources to bring it back to life and have decided to try to find a new home for it.
Chris T (volunteer at AWMM)
Does its F20757/15 chassis number mean that it was originally specified with a 15.9hp engine?
Engine is supposedly 1FF1631 (is this 1,711cc capacity?), though I've been unable to locate that number on the block yet. Car No. is F/BW 2900/15 and Reg No. is BMC 284 (London, 21st April 1934).
The car is currently on long-term display at the Atwell Wilson Motor Museum in Wiltshire. We however don't have the resources to bring it back to life and have decided to try to find a new home for it.
Chris T (volunteer at AWMM)
- peter_winney
- Posts: 1993
- Joined: Wed Nov 20, 2019 3:31 pm
- Location: BATH
Re: Chassie numbers
Re: BMC 284 - Yes, Chassis No - F20757/15 indicates that this car had the "15.9hp" 1711cc engine from new. 1FF1631 is an early one. The option was only made available in 1934. The suffix on the car No. FBW 2900/15 also indicates a 15.9 engine. The 13.9 cars had suffixes /13. The 13.9hp engines had 1F as the prefix and by 1934 had been available on the Harley since 1931.
The extra capacity from the "13.9hp" 1496cc engine was all in the bore, up from 61.25mm to 65.5mm the stroke remaining at 84.63mm.
Thanks for the info about the car it fills a gap in my database and appears as the earliest 12/6 15.9hp on my list.
The extra capacity from the "13.9hp" 1496cc engine was all in the bore, up from 61.25mm to 65.5mm the stroke remaining at 84.63mm.
Thanks for the info about the car it fills a gap in my database and appears as the earliest 12/6 15.9hp on my list.
Member since July 1972
Reconnaissance is seldom wasted
Reconnaissance is seldom wasted
Re: Chassie numbers
Thank you Peter for the prompt and very detailed & helpful response.
Yes, that is indeed the car. Well spotted. BTW it's for sale with or without the non-factory (although in-period) stag's head accessory.
I'll let you know when it finds a new home. Very much appreciated,
Chris T.
Yes, that is indeed the car. Well spotted. BTW it's for sale with or without the non-factory (although in-period) stag's head accessory.
I'll let you know when it finds a new home. Very much appreciated,
Chris T.