ANS:C - higher power to weight ratio.

Two-stroke engines compared to four-stroke engines typically have:

1. Higher Power-to-Weight Ratio: Two-stroke engines tend to have a higher power-to-weight ratio because they produce power with each stroke of the piston, whereas a four-stroke engine requires two complete revolutions of the crankshaft to complete one power stroke.
2. Lower Initial Cost: Two-stroke engines often have a simpler design and fewer components compared to four-stroke engines, which can result in lower manufacturing costs. This can make them less expensive to produce initially.

However, it's important to note that two-stroke engines also have some drawbacks compared to four-stroke engines, including:

• Higher Fuel Consumption: Two-stroke engines typically consume more fuel than four-stroke engines because they require a fuel-air mixture for each stroke of the piston, including the scavenging process where a portion of the fresh mixture is lost during the exhaust stroke.
• Lower Efficiency: Due to their design, two-stroke engines tend to be less fuel-efficient than four-stroke engines. They often produce more emissions and waste more fuel due to incomplete combustion and the mixing of fresh fuel with the exhaust gases.

Overall, while two-stroke engines may offer advantages in terms of power-to-weight ratio and initial cost, they generally have higher fuel consumption and lower efficiency compared to four-stroke engines. Therefore, the choice between the two depends on specific application requirements and considerations such as fuel efficiency, emissions, and operating costs.