Here are key differences in fuel consumption between cars with bigger and smaller engines:

Engine Size and Power:

Bigger Engines: Produce more power, requiring more fuel to maintain higher performance.
Smaller Engines: Use less fuel as they generate less power, making them more fuel-efficient.
Fuel Efficiency:

Bigger Engines: Tend to have lower fuel efficiency because they burn more fuel per kilometer.
Smaller Engines: Are generally more fuel-efficient, consuming less fuel for the same distance.
Driving Conditions:

Bigger Engines: Perform better under heavy loads (e.g., towing) or on highways but use more fuel in urban traffic.
Smaller Engines: Excel in city driving with less fuel consumption but may struggle when under heavy load.
Weight and Aerodynamics:

Bigger Engines: Are often found in heavier vehicles, which leads to higher fuel consumption.
Smaller Engines: Found in lighter cars, contributing to better fuel economy.
Turbocharging:

Bigger Engines: Sometimes do not require turbocharging because of their natural power output.
Smaller Engines: Often include turbochargers to improve power without sacrificing fuel efficiency.
Idle Fuel Consumption:

Bigger Engines: Use more fuel even when idling, as they have more cylinders and larger displacement.
Smaller Engines: Consume less fuel during idle periods, which helps reduce overall consumption.
Maintenance and Tuning:

Bigger Engines: Require more maintenance to maintain fuel efficiency due to their complex components.
Smaller Engines: Are easier and cheaper to maintain, keeping fuel consumption lower over time.
Fuel Types:

Bigger Engines: May require higher octane fuel for optimal performance, increasing fuel costs.
Smaller Engines: Often run efficiently on regular fuel, making them more cost-effective.
These points summarize the typical differences in fuel consumption between cars with larger and smaller engines.