the previous model's Lampredi engine with a 3967 cc Colombo. It diverged from the standard 58.8 mm stroke with a 71 mm stroke and 77 mm bore. Output was 340 to 400 PS with triple Weber carburetors.

Although the 1963 330 series also used a 3967 cc engine with the same bore and stroke as the 400 Superamerica, this 300 PS engine was quite different. It used a wider bore spacing, paving the way for future displacement increases. The spark plugs were moved and a new water