The 1987-1991 Porsche 928S4

Overview

The 911 Turbo 2.7 evolved from the original 911 Turbo 3.0, incorporating displacement reduction and turbocharger efficiency improvements to provide comparable performance while reducing fuel consumption. Produced from 1977 through 1978 as a transitional variant, the 2.7-liter turbocharged flat-six produced 250 horsepower in European specification and 245 horsepower in United States specification. The displacement reduction reflected Porsche engineers' confidence that turbocharged engines could deliver adequate power across a broader RPM range without requiring larger displacement.

Production remained limited as the model served as an interim variant between the 3.0-liter original and the 3.3-liter variant introduced for 1978. The 2.7-liter variant demonstrated that downsizing turbocharged engines could maintain performance while improving fuel economy, a consideration that would influence automotive design philosophies for decades to come.