NOT ALL POWERFUL ENGINES ARE CLEAN, BUT ALL CLEAN ENGINES ARE POWERFUL
For 2005, all Mustang engines enjoy significant weight savings over their predecessors. Weight savings equal greater efficiency, that's pretty basic stuff. So where does the power come in?
The 4.6-liter, 281-cubic-inch engine used in the 2005 Mustang GT convertible and coupe generates more than 65 horsepower per liter. This compares with the 42 horsepower per liter found in the carbureted, small-block 289-cubic-inch V-8 fitted in the 1965 Mustang. By developing an engine that creates 65 horsepower per liter of engine displacement, more energy is extracted from a smaller engine, resulting in a more powerful yet more economical engine. And along with this increased efficiency and power comes all the clean-air benefits of a modern, low-emissions powerplant.
The newly designed, tuned-length exhaust manifold scavenges the burned gases from the engine, allowing a full and fresh charge of fuel and air to enter the combustion chamber. This allows for a more efficient flow of fuel and air in, burnt gases out and the reduction of tail pipe emissions. All helps the 2005 Mustang convertible emit dramatically fewer tail pipe emissions to help it secure the Ultra-low Emission Vehicle II (ULEV II) status.
It's no coincidence that greater horsepower displacement per liter, better flow of cleaner exhaust gases and an overall lighter engine makes a meaner and greener Mustang.