Triumph TR6

The Lucas fuel injection system was originally designed for Rolls Royce. Around the end of the war Lucas designed a fuel injection system for the Merlin aero engine (Probably its tank version the Meteor and later tanks. e.g. the Centurion has Lucas fuel injection instead of a large Zenith carburrettor. It was not a direct fuel injection such as was fitted to German
Daimler Benz aero engines of World War 2 as this would have lost the effect of chargecooling. Lucas continued to design and build fuel systems for Rolls Royce gas turbine engines and they still do.
The Lucas petrol injection system however was designed for a particular application of one of the 'B' range military and commercial petrol engines produced by Crewe. These engines of four, six and eight cylinders were designed in the late 1930s for motor cars that might have replaced the Phantom III Wraith and Bentley MkV if war had not intervened.
The postwar cars were powered by versions of the B60 and B80 but a major application of these engines was and is powering military combat vehicles.
One particular application of a B-range engine was a postwar German light tank. A tight spec. was put on this engine. This led to developing a special cylinder head with individual instead of twinned exhaust ports and also to Lucas developing the fuel injection system in place of the normal carburettors. In finality the tank was not proceeded with but the fuel system was employed in racing and found its way into certain production Triumph models.