* Fuel efficiency: Piston engines are more efficient in converting fuel into power. This is due to their four-stroke cycle, which allows for better air-fuel mixing and combustion. Rotary engines, with their unique design, struggle to achieve the same level of efficiency.
* Compression ratio: Piston engines typically have higher compression ratios than rotary engines. This allows them to extract more energy from the fuel.
* Friction: Rotary engines have more moving parts and experience higher friction, leading to energy loss and reduced efficiency.
* Power output: For a given displacement, rotary engines typically produce less power than piston engines. This means they require more fuel to achieve the same performance.
However, it's important to note that:
* Advancements in technology: Both rotary and piston engines have seen significant advancements in recent years, leading to improved fuel efficiency in both types.
* Driving style: The mileage you achieve will also depend on factors like driving habits, vehicle weight, and road conditions.
While rotary engines might offer a unique driving experience and higher revving capabilities, they typically fall behind piston engines in terms of fuel economy.
