Most steam engines except those used on tourist railroads have been replaced with the more efficient steam turbine engines.
Petrol engines are widely considered to be the most efficient of engines, because they are more refined than diesel. Since diesel is not completely refined, it cannot completely combust and so does not (in theory) produce as much energy per litre of fuel as a petrol engine. However, some diesel engines can be made to be much more efficient than petrol engines because they have a different type of fuel, and burn it in a different way. Petrol engines are widely considered to be the most efficient of engines, because they are more refined than diesel. Since diesel is not completely refined, it cannot completely combust and so does not (in theory) produce as much energy per litre of fuel as a petrol engine. However, some diesel engines can be made to be much more efficient than petrol engines because they have a different type of fuel, and burn it in a different way.
too much torque and not efficient enough
Spur Gear is the most efficient
more efficient, most efficient
The conversion of chemical energy to kinetic energy is typically the most efficient, with efficiencies in the range of 20-40% in combustion engines. In contrast, the conversion of thermal energy to mechanical work in heat engines is generally less efficient, with efficiencies typically below 30%.
Diesel engines are more efficient than gasoline engines.
Most steam engines except those used on tourist railroads have been replaced with the more efficient steam turbine engines.
Many Honda Civics came with Vtech engines which greatly increased their power and performance. These engines were designed to run at very high revolutions to produce the most efficient power curve.
In the United states the Toyota Prius is the most fuel efficient car using a hybrid of electric and fuel in a 4 cyclinder engine allows close to an average of 50 miles to a gallon on any commute.
The superlative of efficient is "most efficient."
Petrol engines are widely considered to be the most efficient of engines, because they are more refined than diesel. Since diesel is not completely refined, it cannot completely combust and so does not (in theory) produce as much energy per litre of fuel as a petrol engine. However, some diesel engines can be made to be much more efficient than petrol engines because they have a different type of fuel, and burn it in a different way. Petrol engines are widely considered to be the most efficient of engines, because they are more refined than diesel. Since diesel is not completely refined, it cannot completely combust and so does not (in theory) produce as much energy per litre of fuel as a petrol engine. However, some diesel engines can be made to be much more efficient than petrol engines because they have a different type of fuel, and burn it in a different way.
The definition of gOOgle in the Urban Dictionary would be the most efficient and reliable of internet engines available. It is the fastest and most popular and respected company.
The most fuel efficient cars on the road are smaller cars with either hybrid (gas/electric) or diesel engines. Examples of such cars are the popular Toyota Prius(44/mpg) or the Volkswagen Jetta(34/mpg) diesel.
By a generous estimate, they can be about 30% more efficient than a gasoline engine. I assume you mean "are turbines more efficient than piston engines". Depends on the running conditions. At full load, steady running conditions, turbines are better than piston Engines. At varying loads, turbines often do quite poorly.
Lighter weight, more aerodynamic, and more fuel efficient engines, transmissions, and tires.
too much torque and not efficient enough