Diesel engines are more efficient than gasoline because chambers are different. A diesel engine has better gas mileage.
The diesel is more efficient but more expensive to build.
Diesel engines are more efficient than gasoline engines.
It will depend upon the conditions. Under normal operating conditions a diesel engine is more efficient than a petrol engine.
The engine was cleaner and more efficient.
diesel cycle
Overall it is about 20%
CRDi
The most efficient to date is a 2-stroke design. it is a turbo desiel 2-stroke. but normally a 4-stroke is usually the more efficient of the two engine types.
Yes, the indirect injection is more fuel efficient because it provides stability to the engine.
2.5 liter engine is smaller and more fuel efficient. 3.5 liter engine is a strong engine with better acceleration, but is less fuel efficient
Generally, the more valves an engine has the more efficient it is.
The question you mean to ask is about the transmissions--standard or automatic. This has nothing to do with the engine.