Most cars have their most fuel efficient speed at around 80-100 km/h, but most main roads are 100-130 km/h in terms of maximum speed. Shouldn’t we change cars?
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>Most cars have their most fuel efficient speed at around 80-100 km/h, but most main roads are 100-130 km/h in terms of maximum speed. Shouldn’t we change cars?
A maximum speed is just that – the **maximum**. Anyone wishing to be fuel-efficient is free to drive at a lower speed.
As to the engine part, no doubt an engineer will chime in and give a more proficient answer than I ever could as to how car efficiency speeds are a mere byproduct of physics and design, not a goal post that is actively modified or striven towards.
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