Lotus 907

With a displacement of 1,973 cubic centimetres (120.4 cu in), the engine is constructed entirely from aluminium alloy and features dual overhead camshafts (DOHC) along with a 16-valve configuration.

The engine produced approximately 144 bhp (107 kW) in most markets when equipped with dual side-draft Dell'Orto carburettors.

For vehicles destined for the United States market, the engine used Zenith-Stromberg carburettors to meet stricter emissions standards.

The Lotus 907 was colloquially referred to as "The Torqueless Wonder" due to its relatively low torque output at lower engine speeds, contrasted with its strong high-end horsepower performance.

[1]: 38  Colin Chapman, founder of Lotus, negotiated a deal with Vauxhall to purchase their cast-iron engine blocks.