Toyota's new dynamic force engine is super efficient

Toyota's Dynamic Force Engine Has Reached 40% Thermal Efficiency
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Toyota's "Dynamic Force Engine" is designed with torque, power, and efficiency in mind. The whole idea of the engine centers on improving the speed of combustion. If combustion is faster, the engine makes more torque, and it does so more efficiently. So how did they do this?

Well there are numerous features of the engine which encourage quick combustion. It starts with a compression ratio of 13:1 for conventional engines, or 14:1 for their engine paired with hybrid vehicles. They've increased the stroke/bore ratio, increased the angle between the intake and exhaust valves, straightened the intake path, and incorporated laser clad valve seats. All this results in combustion that you can watch side-by-side occurring significantly faster versus the previous engine.

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