Who bought The Chassis Data?

The Chassis Data was the first instalment of my multi-volume history of Jensen. It sold out in 2016, a quarter century after its 1991 release. A thoroughly updated version was released in August 2019 as The Jensen Genome.

The Chassis Data was the foundation on which all my subsequent Jensen books were based. None of them could have been completed without the basic research which led to this so-called "bible" of Jensen car production. With any luck, the data will continue to underpin other Jensen books which I hope are yet to come. 

With that in mind, it's interesting to see how it sold over the years. 

For a start, you could hardly call it a best seller. The print order was a notional 1000 copies which, with the overrun, ended up being 1128. Of these, 88 were given away in promotions, legal deposit, reviews and as presents and prizes. A few were issued to replace damaged or lost copies and I retain some archival copies.

The upshot is that 1118 of them made their way out into the world. Over 25 years, that's an average of about 45 books a year less than one a week. Nothing flash about that rate of sales. 

Geographically, this is where they went.

UK 46%
Australia 21%
USA 20%
New Zealand 6%
Netherlands 3%
Switzerland 2%
Sweden 1%
Others 1%
TOTAL 100%

During that time, many individuals, clubs and other outlets sold databooks. For 10 years, I did not live in Australia where the stock of books was kept, so it was hard to keep the usual outlets supplied.  Nevertheless, in 25 years the books were sold from 21 outlets, the main ones being as follows:

Jensen Owners Club 35%
Author 20%
Jensen Healey Preservation Society 8%
Jensen Owners Register & JMNZ 6%
K&D Enterprises 5%
The Jensen Club 4%
Cropredy Bridge Garage 4%
Graeme Watkins 3%
Terry McGrath 3%
Association of Jensen Owners 3%
Het Jensen Genootschap 3%
Swedish Jensen Drivers Club 1%
Swiss Jensen Owners Club 1%
Others 4%
TOTAL 100%

I use a books/cars index to determine where my books are finding the strongest support. The Chassis Data index shows that, relative to the population of Jensen cars sold into the various markets, Australia, New Zealand and the Netherlands were the strongest supporters of the book. A books/cars index of 1.0 is what may be considered "normal". The UK market falls into this band while the USA was substantially weaker as a market for databooks.  





Australia 21% 11.7
New Zealand 6% 8.6
Netherlands 3% 7.5
Switzerland 2% 2.0
UK 46% 1.2
USA 20% 0.4
Others 2% 0.7
TOTAL 100%  

25 years is a long time to be storing books, keeping them clean and dry and free from roaches and mice. The lesson in this for me has been that print runs of this size are too high for a niche market like Jensen. As a result, The Jensen Genome was produced in a print run of only 500 copies, the lowest of the five books to date. This will help ensure that the storage time is not so long but it also means that the unit cost goes up. There's a limit to how many 25 year periods you can squeeze into one lifetime. I suppose the moral of the story is this get it while you can.



Richard Calver 2016-2020