This is the 50th enlargement (10th August 2019)

of a website which is not a commercial project, and which has now been running for 10 years. The format basically provides analyses of the engines for 'Grand Prix Cars-of-the-Year' (CoY) from 1906 to 2000.

Many items have been added which are post-2000. For these please consult Notes 108,111,112,119,120,121,129 (see list at end of Contents)

and Corrections and Additions at PP 1,7,17,31,44 and 69.

The main period is sub-divided into 5 Eras:-
As a quick introduction to the site, some visitors may like to view a small selection of the cars listed as "Grand Prix Cars-of-the-Year" (CoY).

This is provided in Note 127

Checking on this will give links to the selection.


Overview & Analyses

The 49th enlargement used the latest data to provide the following:-

These 3 sections are a set which should be read consecutively.

Chart A1, from the Analysis UPDATE Part 2, gives a general look overall using the Parameter ECOM (see below) of the basic review 1906-2000, plus some added information on 2001-2018.

Combined Efficiency (ECOM) 1906-2006


Combined Efficiency (ECOM) is defined in an Addendum to the
1st Naturally-Aspirated Era (1NA)

The details for the engines are given in Appendix 1 under row 130.

The Contents section below gives links to these Eras and to various general chapters on racing engine design and development.

Recently 4 new Appendices have been added to the site (see Contents):-

Each of these Appendices has associated ILLUSTRATIONS


Visitors should consult CORRECTIONS & ADDITIONS for the latest data on some entries where an index is provided for Engines (P.i) and another for Subjects (P.ii) to help locate changes.


The 37th enlargement added a new section:

  • 'A Century of Grand Prix Engine Weights, 1906 - 2005'.

             Figure 1 from this section is shown below:-
  • Figure 1 from 'Grand Prix Engine Weights'


    The 38th enlargement

    It was thought visitors would be interested in some research into pre-WW2 Brooklands speeds which was undertaken for a special purpose.


    The 39th enlargement

    A comparative analysis has been done on engines ranging from Series Production to Full Racing with a sample of 10 types. This is given in: