I don't understand the issue
The Cosworth-designed FVA and DFV were funded by Ford.
As I understand it:
The FVA was sold as a Cosworth engine so Jackie Ickx drove a Formula 2 Matra-Cosworth or Formula 2 Matra-Cosworth ballasted to qualify as a Formula 1 car in his early Nurburgring races.
The DFV was branded as a Ford engine so a DFV is correctly described as a Ford.
The DFV-derived F1 engines, DFX, DFZ, and DFR are also Fords
The DFL long distance engine and the DFW 'Tasman' engine are also Fords
but the Indianapolis DFX and DFS were branded as Cosworth
Likewise, the later HB and ED V8s, the Zetec-R V10 and the turbocharged TEC V6 are also Fords although developed by Cosworth.
So, in your database they should all be Ford except the FVA.
In the case of Williams, because of their Saudi Arabian sponsors and Saudi Arabia having a sanctions policy against Ford for having dealings with Israel, the team put 'Cosworth' cam covers from the indianapolis DFX on their engines (until Ford spotted it). So these are also Ford engines, notwithstanding any photographic evidence to the contrary.
A coterie of motor racing writers headed by Denis Jenkinson (DSJ of Motor Sport) felt that credit should be given to the engineering behind an engine rather than the funding and insisted on describing the DFV and derivatives as 'Cosworth' engines. But they should still be listed in a database as 'Ford'.
Similar questions will apply with other makers - Where a production engine was developed: Conrero & Alfa Romeo, Simca & Gordini, Lea Francis and Connaught. Another nproblem is Lancia and Ferrari where Ferrari took over the Lancia racing efforts. Then there are Mugen & Honda, Megatron & BMW, Mecachrome & Renault and the other cases where an engine was rebranded.
This all illustrates clearly why every database should include an "Explanatory Notes" column for the cases that can't be neatly pigeonholed.
Edited by D-Type, 01 December 2013 - 20:42.