The Lagonda 3 Litre began production in late 1929 as successor to the 2 Litre.

In fact, the 2 Litre continued to be made in various guises until 1933, while the 3 Litre was phased out the following year.

The early 3 Litres utilised a Z-Type 10ft 9in wheelbase chassis which was an extended and modified version of that employed by the four-cylinder 2 Litre.

Elongated from the scuttle forwards, the revised frame could thus accommodate the newcomer's six-cylinder engine.

The 'heavy pattern' Z-Type gearbox and ENV rear axle were used providing a final drive ratio of 4.1:1.

The 3 Litre model's initial bore and stroke stood at 72mm x 120mm providing 2931cc capacity.

These earlier engines are instantly identified by six camshaft tunnel covers on the side of the block.

On later cars this capacity was increased to 3181cc with a bore of 75mm - the larger engine is recognised by corresponding 3 plate camshaft tunnel covers and a deeper rocker cover to accommodate longer valve stems.

Both e...