More efficient ceramic or diesel engines can improve mileage.

More powerful engines can improve an airplane's acceleration and reduce its takeoff run.

Such an engine is overall simpler and also has improved cold starting.

The new engines improve mileage by achieving more complete combustion of gasoline.

An engine of much higher power would greatly improve performance, in spite of a shorter burning time.

The new engine improved the aircraft's performance considerably, maximum speed increased to 365 km/h.

The new engines have also improved fuel economy by 4.2% on the LS3 V8.

These engines will improve mileage in cars by 10 to 25 percent - much more economical than Detroit's offerings.

Within the next few years, new engines will reduce fuel consumption and improve exhaust cleanliness.

Rolls-Royce said the new engines would improve fuel economy by up to 12 percent, lower pollution levels, provide extended range and reduce maintenance costs.